Life Boot Camp 5.9C Predict the effects of changes in ecosystems caused by living organisms including humans such as the overpopulation of grazers or the building of highways.
Life Boot Camp
Feb 25, 2016
Life Boot Camp. 5.9C Predict the effects of changes in ecosystems caused by living organisms including humans such as the overpopulation of grazers or the building of highways. - PowerPoint PPT Presentation
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Life Boot Camp
5.9CPredict the effects of changes in ecosystems caused by living organisms including humans such as the overpopulation of grazers or the
building of highways.
STAAR 2013 #36; RC 4; Supporting, F
1. The picture below shows a type of plant called kudzu. Kudzu is a fast-growing Asian vine that was introduced into the United States. Kudzu quickly uses available resources and can completely cover the plants in an area. What effect does the rapid growth of kudzu most likely have on an ecosystem?
F. The variety of native plants decreases.G. The water supply in the area increases.H. Weather patterns in the area change.J. The number of other plants increases
STAAR 2013 #36; RC 4; Supporting
1. The picture below shows a type of plant called kudzu. Kudzu is a fast-growing Asian vine that was introduced into the United States. Kudzu quickly uses available resources and can completely cover the plants in an area. What effect does the rapid growth of kudzu most likely have on an ecosystem?
F. The variety of native plants decreases.G. The water supply in the area increases.H. Weather patterns in the area change.J. The number of other plants increases
2. According to the chart, what would most likely happen in an ecosystem if there were a sudden decrease in the number of bacteria and fungi?
A The number of plants would increase.B The number of bees would increase.C The amount of nutrients in the soil would decrease.D The amount of water in the air would decrease.
TAKS Study Guide, #13
2. According to the chart, what would most likely happen in an ecosystem if there were a sudden decrease in the number of bacteria and fungi?
A The number of plants would increase.B The number of bees would increase.C The amount of nutrients in the soil would decrease.D The amount of water in the air would decrease.
TAKS Study Guide, #13
2004—#1 (88%)
3. Clearing a forest to build a shopping mall will most likely result in woodpeckers —
A nesting on roofsB losing habitatC laying more eggsD flying slower
2004—#1 (88%)
3. Clearing a forest to build a shopping mall will most likely result in woodpeckers —
A nesting on roofsB losing habitatC laying more eggsD flying slower
2011—STAAR™ Released Test Questions, #10The picture below shows a frog in a pond containing duckweed.
4. Which of these human activities would most likely cause an overgrowth of duckweed in a pond environment?A Gradually introducing geese into the pondB Fishing in the pond as recreationC Planting trees in nearby forestsD Heavily fertilizing nearby farm fields
2011—STAAR™ Released Test Questions, #10The picture below shows a frog in a pond containing duckweed.
4. Which of these human activities would most likely cause an overgrowth of duckweed in a pond environment?A Gradually introducing geese into the pondB Fishing in the pond as recreationC Planting trees in nearby forestsD Heavily fertilizing nearby farm fields
5. Mountain lions do not live near humans. As the human population increases, the mountain lion—
A loses habitatB increases in populationC adapts to city lifeD has more cubs
5. Mountain lions do not live near humans. As the human population increases, the mountain lion—
A loses habitatB increases in populationC adapts to city lifeD has more cubs
6. When trees develop leaves in the spring, changes occur on the forest floor. Why does the development of leaves cause changes on the forest floor?
A Rainfall increases. B Sunlight is reduced.C Wind speed increases. D Animal migration is stopped.
6. When trees develop leaves in the spring, changes occur on the forest floor. Why does the development of leaves cause changes on the forest floor?
A Rainfall increases. B Sunlight is reduced. (leaves provide shade)C Wind speed increases. D Animal migration is stopped.
7. What is a likely consequence of cutting down rainforests?
A A decrease in the amount of air pollution on Earth B An increase in the number of plants living on EarthC A decrease in the variety of organisms living on EarthD An increase in the number of arctic ecosystems on
Earth
7. What is a likely consequence of cutting down rainforests?
A A decrease in the amount of air pollution on Earth B An increase in the number of plants living on EarthC A decrease in the variety of organisms living on EarthD An increase in the number of arctic ecosystems on
Earth
8. The diagram below shows an area before and after a housing development was built there.
Tall pine trees grow very well in East Texas. However, these trees do not do well in parts of West Texas. Which of the following is MOST important in determining where a plant can grow and survive?
A WindB ClimateC TidesD Sunshine
8. The diagram below shows an area before and after a housing development was built there.
Tall pine trees grow very well in East Texas. However, these trees do not do well in parts of West Texas. Which of the following is MOST important in determining where a plant can grow and survive?
A WindB ClimateC TidesD Sunshine
9. A science teacher bought some tomatoes that were still green and not yet ripened. He placed half of them in the refrigerator and half on a kitchen table at room temperature. After 4 days, the tomatoes in the refrigerator were still green, while those on the table were red and ripe. Which of the following is the BEST reason for the difference in ripening?
A Tomatoes need sunlight to ripen.B There was not enough air in the refrigerator.C The tomatoes placed in the refrigerator were just bad.D Tomatoes do not ripen well at cold temperatures.
9. A science teacher bought some tomatoes that were still green and not yet ripened. He placed half of them in the refrigerator and half on a kitchen table at room temperature. After 4 days, the tomatoes in the refrigerator were still green, while those on the table were red and ripe. Which of the following is the BEST reason for the difference in ripening?
A Tomatoes need sunlight to ripen.B There was not enough air in the refrigerator.C The tomatoes placed in the refrigerator were just bad.D Tomatoes do not ripen well at cold temperatures.
10. If a fire destroyed the grasses on a grassy plain, which animal would most likely be affected first?
A CoyotesB AlligatorsC RabbitsD Red-tail hawks
10. If a fire destroyed the grasses on a grassy plain, which animal would most likely be affected first?
A CoyotesB AlligatorsC RabbitsD Red-tail hawks
11. Female seals usually return to the same beaches year after year to give birth. If they are repeatedly disturbed by humans at those beaches, how will the seals most likely respond?
A They will change color. B They will give birth to more pups. C They will hunt for food more often. D They will give birth at different beaches.
11. Female seals usually return to the same beaches year after year to give birth. If they are repeatedly disturbed by humans at those beaches, how will the seals most likely respond?
A They will change color. B They will give birth to more pups. C They will hunt for food more often. D They will give birth at different beaches.
12. Why would fewer bees come to a plant if the petals of its flowers were removed?
A There would not be any nectar in the flowers.B The bees would not be attracted to the flowers.C The bees would not have a spot to land while sipping
nectar.D The bees would not be able to leave their scent on the flowers.
12. Why would fewer bees come to a plant if the petals of its flowers were removed?
A There would not be any nectar in the flowers.B The bees would not be attracted to the flowers.C The bees would not have a spot to land while sipping
nectar.D The bees would not be able to leave their scent on the flowers.
13. Snakes feed on mice. The mice eat grain crops. When the crops are plentiful, what will MOST LIKELY happen?
A The mouse population will decrease.B The snake population will increase.C The snake population will decrease. D The mouse population will not change.
13. Snakes feed on mice. The mice eat grain crops. When the crops are plentiful, what will MOST LIKELY happen?
A The mouse population will decrease.B The snake population will increase.C The snake population will decrease. D The mouse population will not change.
15. A wetland was drained to build a mall. Two years later, there were no more toads in that area. Why did the toads disappear?
A The toads were destroyed by the construction equipment.
B The toads died because toads cannot breathe out of water.C The toads were frightened and went into the woods.D The toads got their food from the wetland ecosystem.
15. A wetland was drained to build a mall. Two years later, there were no more toads in that area. Why did the toads disappear?
A The toads were destroyed by the construction equipment.
B The toads died because toads cannot breathe out of water.C The toads were frightened and went into the woods.D The toads got their food from the wetland ecosystem.
16. Which of these might cause a forest habitat to become a desert?
A No rainB Flooded riversC High windsD Hot summers
16. Which of these might cause a forest habitat to become a desert?
A No rainB Flooded riversC High windsD Hot summers
17. In one study, scientists found that the number of raccoons increased where people built homes in the raccoons’ habitats. Which of the following is the MOST LIKELY reason why the number of raccoons increased?
A Raccoons no longer lived in wild areas.B Raccoons found more food living near humans.C More predators of raccoons live near people’s homes.D People destroyed raccoon habitats when they built homes.
17. In one study, scientists found that the number of raccoons increased where people built homes in the raccoons’ habitats. Which of the following is the MOST LIKELY reason why the number of raccoons increased?
A Raccoons no longer lived in wild areas.B Raccoons found more food living near humans.C More predators of raccoons live near people’s homes.D People destroyed raccoon habitats when they built homes.
18. If disease removed a species of plant from a food web, how would that ecosystem MOST LIKELY be affected?
A All of the plants in the ecosystem would become extinct.B The organisms that eat the plant would become extinct.C Consumers of the plant would have a smaller food source.D Producers in the ecosystem would have a smaller energy supply.
18. If disease removed a species of plant from a food web, how would that ecosystem MOST LIKELY be affected?
A All of the plants in the ecosystem would become extinct.B The organisms that eat the plant would become extinct.C Consumers of the plant would have a smaller food source.D Producers in the ecosystem would have a smaller energy supply.
19. A gardener watered each of these pots with equal amounts of water. Only one pot was given fertilizer that increases the number of flowers on each plant. Which plant was PROBABLY given the fertilizer?
A WB XC YD Z
19. A gardener watered each of these pots with equal amounts of water. Only one pot was given fertilizer that increases the number of flowers on each plant. Which plant was PROBABLY given the fertilizer?
A WB XC YD Z
20. What might happen if the habitat of white-tailed deer decreases in size?
A White-tailed deer will have more food.B The number of white-tailed deer the habitat
can support will decrease.C The number of white-tailed deer will increase.D Weaker white-tailed deer will survive longer.
20. What might happen if the habitat of white-tailed deer decreases in size?
A White-tailed deer will have more food.B The number of white-tailed deer the habitat
can support will decrease.C The number of white-tailed deer will increase.D Weaker white-tailed deer will survive longer.
21. A certain type of wildflower grew in a sunny meadow. Over several years, nearby trees formed a shade canopy over the entire meadow. Many years later, the wildflowers no longer grew in the meadow. Which factor directly led to the extinction of this population of wildflowers?
A The building of large citiesB Pollution from nearby homesC Overpopulation of plant-eating organismsD A change in the wildflower’s habitat
21. A certain type of wildflower grew in a sunny meadow. Over several years, nearby trees formed a shade canopy over the entire meadow. Many years later, the wildflowers no longer grew in the meadow. Which factor directly led to the extinction of this population of wildflowers?
A The building of large citiesB Pollution from nearby homesC Overpopulation of plant-eating organismsD A change in the wildflower’s habitat
22. Bison are grazing animals. They travel across a prairie, eating grass. If there were too many bison in an area, there would probably be—
A fewer predators of bisonB many other large grazing animalsC tall shrubs and many treesD less grass and more bare soil
22. Bison are grazing animals. They travel across a prairie, eating grass. If there were too many bison in an area, there would probably be—
A fewer predators of bisonB many other large grazing animalsC tall shrubs and many treesD less grass and more bare soil
23. A woodland is cut down so a shopping center and many new houses can be built over the next two years. What will MOST LIKELY occur in the local ecosystem in the next five years?
A Wildlife will compete less for food.B More species of birds will live there.C Water levels will be lower when it rains.D Rain will wash more pollution into creeks.
23. A woodland is cut down so a shopping center and many new houses can be built over the next two years. What will MOST LIKELY occur in the local ecosystem in the next five years?
A Wildlife will compete less for food.B More species of birds will live there.C Water levels will be lower when it rains.D Rain will wash more pollution into creeks.
24. Highways allow people to travel between towns and cities. These highways also divide ecosystems into smaller pieces. Animals can become separated from lakes they use for breeding. For example, tiger salamanders travel long distances to breed at certain lakes. How could highway systems affect animals such as the tiger salamander?
A Tiger salamander habitats may be exposed to less pollution.B Tiger salamanders may be cut off from important resources.C Tiger salamanders could improve their ability to remember roads.D Tiger salamander habitats within ecosystems could become larger.
24. Highways allow people to travel between towns and cities. These highways also divide ecosystems into smaller pieces. Animals can become separated from lakes they use for breeding. For example, tiger salamanders travel long distances to breed at certain lakes. How could highway systems affect animals such as the tiger salamander?
A Tiger salamander habitats may be exposed to less pollution.B Tiger salamanders may be cut off from important resources.C Tiger salamanders could improve their ability to remember roads.D Tiger salamander habitats within ecosystems could become larger.
25. The Great Barrier Reef has a number of endangered species which live only in that ecosystem. What would MOST LIKELY happen if pollution killed most of the coral that made up the reef?
A The endangered species might become extinct.B The animals on the reef would find a new habitat.C The population size of the endangered species
would increase.D The endangered species would take the niche of the dead coral.
25. The Great Barrier Reef has a number of endangered species which live only in that ecosystem. What would MOST LIKELY happen if pollution killed most of the coral that made up the reef?
A The endangered species might become extinct.B The animals on the reef would find a new habitat.C The population size of the endangered species
would increase.D The endangered species would take the niche of the dead coral.
26. A species of giant pandas lives only in central China. Bamboo, a tall, green tropical plant, is the main food source for these animals. Large areas of bamboo are being cut down in central China to make room for growing other crops. What will MOST LIKELY happen to these giant pandas?
A They will become endangered or extinct.B They will migrate to warmer areas of China.C They will become carnivores.D They will begin to live in caves.
26. A species of giant pandas lives only in central China. Bamboo, a tall, green tropical plant, is the main food source for these animals. Large areas of bamboo are being cut down in central China to make room for growing other crops. What will MOST LIKELY happen to these giant pandas?
A They will become endangered or extinct.B They will migrate to warmer areas of China.C They will become carnivores.D They will begin to live in caves.
27. The marsh willow herb is a plant that naturally grows in the northeastern part of the United States. It grows best in damp habitats. Which of the following environmental changes would MOST LIKELY cause a decrease in the marsh willow herb population in an area?
A A rainstorm lasting several weeksB A drought lasting more than a yearC Unusually low temperatures during the month of JulyD Unusually high temperatures during the month of January
27. The marsh willow herb is a plant that naturally grows in the northeastern part of the United States. It grows best in damp habitats. Which of the following environmental changes would MOST LIKELY cause a decrease in the marsh willow herb population in an area?
A A rainstorm lasting several weeksB A drought lasting more than a yearC Unusually low temperatures during the month of JulyD Unusually high temperatures during the month of January
28. Teresa and Rafael each set up a terrarium for a class project. Teresa never had to add water to her terrarium, but Rafael had to water his every other day. Why do you think this happened?
A Teresa poured more water in hers before closing it up.B Rafael used different plants in his terrarium.C Rafael left the top off and the water inside evaporated quickly.D Teresa used more plant food than Rafael did.
28. Teresa and Rafael each set up a terrarium for a class project. Teresa never had to add water to her terrarium, but Rafael had to water his every other day. Why do you think this happened?
A Teresa poured more water in hers before closing it up.B Rafael used different plants in his terrarium.C Rafael left the top off and the water inside evaporated quickly.D Teresa used more plant food than Rafael did.
29. How does too much fishing in an area affect its ecosystem?
A The fish will lay many more eggs to replace the fish that were caught.B Organisms that eat the fish could become endangered due to starvation.C Organisms that eat the fish will have to start
eating plants.D People could eat too many fish and become ill.
29. How does too much fishing in an area affect its ecosystem?
A The fish will lay many more eggs to replace the fish that were caught.B Organisms that eat the fish could become endangered due to starvation.C Organisms that eat the fish will have to start
eating plants.D People could eat too many fish and become ill.
30. Which of the following would have the greatest effect on an ecosystem because of the changes made to the environment?
A Bees building a hive in a hollow treeB Wasps building a nest in a leafy bushC Beavers building a dam across a stream D Fish digging a burrow on a river bottom
30. Which of the following would have the greatest effect on an ecosystem because of the changes made to the environment?
A Bees building a hive in a hollow treeB Wasps building a nest in a leafy bushC Beavers building a dam across a stream (could slow down the water too much for other aquatic organisms)
D Fish digging a burrow on a river bottom
31. Which of the following is an example of how living organisms change their physical environment to meet their needs?
A Before building their lodge, beavers build a dam across a stream.
B A bird eats seeds from a backyard bird feeder.
C A raccoon washes a piece of fruit in a lake before eating the fruit.
D A young kangaroo climbs into its mother’s pouch for warmth.
31. Which of the following is an example of how living organisms change their physical environment to meet their needs?
A Before building their lodge, beavers build a dam across a stream.
B A bird eats seeds from a backyard bird feeder.
C A raccoon washes a piece of fruit in a lake before eating the fruit.
D A young kangaroo climbs into its mother’s pouch for warmth.
32. Which of the following is not an example of a way organisms change their environment to meet their needs?
A A wasp builds a nest made of mud.B A human builds a house.C A prairie dog digs a tunnel into the ground.D A bird rests on the limb of a tree.
32. Which of the following is not an example of a way organisms change their environment to meet their needs?
A A wasp builds a nest made of mud.B A human builds a house.C A prairie dog digs a tunnel into the ground.D A bird rests on the limb of a tree.
33. Water lilies growing on ponds and lakes can do great damage to these bodies of water. How do the water lilies affect a pond environment in a dangerous way?
A The fish will not grow and reproduce.B Water lilies pollute the pond water.C Water lilies prevent sunlight from reaching organisms below the water’s surface.D Water lilies attract many unwanted pests, such as snakes and turtles to the pond.
33. Water lilies growing on ponds and lakes can do great damage to these bodies of water. How do the water lilies affect a pond environment in a dangerous way?
A The fish will not grow and reproduce.B Water lilies pollute the pond water.C Water lilies prevent sunlight from reaching organisms below the water’s surface.D Water lilies attract many unwanted pests, such as snakes and turtles to the pond.
34. Tropical rainforests are cut down and burned at a very high rate in many parts of the world. An area the size of a football field is destroyed every second of every day. The burning wood and vegetation release large amounts of carbon dioxide. Fewer plants remain to take in carbon dioxide. How does this burning affect the carbon cycle in tropical rain forests?
A More carbon dioxide is released into the atmosphere.B More carbon dioxide is stored in animals.C More carbon dioxide is released into the soil.D More carbon dioxide is stored in plants.
34. Tropical rainforests are cut down and burned at a very high rate in many parts of the world. An area the size of a football field is destroyed every second of every day. The burning wood and vegetation release large amounts of carbon dioxide. Fewer plants remain to take in carbon dioxide. How does this burning affect the carbon cycle in tropical rain forests?
A More carbon dioxide is released into the atmosphere.B More carbon dioxide is stored in animals.C More carbon dioxide is released into the soil.D More carbon dioxide is stored in plants.
M.S. ?’s
35. All of the following are ways humans can adversely change the ecosystem EXCEPT—
A. waste dumpingB. using biodegradable productsC. overhunting animalsD. industrial pollution
M.S. ?’s
35. All of the following are ways humans can adversely change the ecosystem EXCEPT—
A. waste dumpingB. using biodegradable productsC. overhunting animalsD. industrial pollution
36. What effect would building a highway have on an ecosystem?
A. Increase in butterfly migrationB. Decrease in destruction of habitatC. Increase in carbon dioxideD. Increase in oxygen
36. What effect would building a highway have on an ecosystem?
A. Increase in butterfly migrationB. Decrease in destruction of habitatC. Increase in carbon dioxideD. Increase in oxygen
37. Overpopulation animals cause severe damage to an ecosystem and the surrounding landscape. Additionally, overpopulation can affect the food chain, water routes, and land. Based on the information provided, which of the following is the best conclusion about the effects of overpopulation?
A. Overpopulation is destroying the entire U.S.B. Overpopulation does not impact the food chainC. Overpopulation can change the entire structure of the ecosystemD. Overpopulation causes serious issues with the water cycle
37. Overpopulation animals cause severe damage to an ecosystem and the surrounding landscape. Additionally, overpopulation can affect the food chain, water routes, and land. Based on the information provided, which of the following is the best conclusion about the effects of overpopulation?
A. Overpopulation is destroying the entire U.S.B. Overpopulation does not impact the food chainC. Overpopulation can change the entire structure of the ecosystemD. Overpopulation causes serious issues with the water cycle
38. Hunting is an environmental management tool that helps control wildlife populations. Hunting is an example of—
A. the deer population creating change in an ecosystemB. the food chain creating change in an ecosystemC. humans creating change in an ecosystemD. a cycle creating change in an ecosystem
38. Hunting is an environmental management tool that helps control wildlife populations. Hunting is an example of—
A. the deer population creating change in an ecosystemB. the food chain creating change in an ecosystemC. humans creating change in an ecosystemD. a cycle creating change in an ecosystem
39. Which of the following is a positive effect of building highways in an ecosystem?
A. Enhancing access between existing communitiesB. Destruction of existing homes and businessesC. Prohibiting some species from migratingD. Increase in noise and air pollution
39. Which of the following is a positive effect of building highways in an ecosystem?
A. Enhancing access between existing communitiesB. Destruction of existing homes and businessesC. Prohibiting some species from migratingD. Increase in noise and air pollution
40. Which activity by people puts the greatest number of animals at risk for becoming endangered?
A. starting forest firesB. destruction of habitatC. hunting and fishingD. making pets of wild animals
40. Which activity by people puts the greatest number of animals at risk for becoming endangered?
A. starting forest firesB. destruction of habitatC. hunting and fishingD. making pets of wild animals
41. What is an effect of cutting down forests for the development of land and cities?
A. increase in amount of oxygenB. decrease in energy provided for producersC. lack of habitat areas for plants and animalsD. gain of habitat areas for new species of animals and plants
41. What is an effect of cutting down forests for the development of land and cities?
A. increase in amount of oxygenB. decrease in energy provided for producersC. lack of habitat areas for plants and animalsD. gain of habitat areas for new species of animals and plants
42. The Texas Blind Salamander lives in the underwater caves of the Edwards Aquifer, which is used to proved drinking water for many Texans. The Texas Blind Salamander has been on the endangered list since 1967. Which could NOT be a possible cause for the salamanders being on the endangered list?
A. motor oil draining into the sewerB. using lots of water for irrigationC. lower average rainfall totalsD. swimming and fishing activities
42. The Texas Blind Salamander lives in the underwater caves of the Edwards Aquifer, which is used to proved drinking water for many Texans. The Texas Blind Salamander has been on the endangered list since 1967. Which could NOT be a possible cause for the salamanders being on the endangered list?
A. motor oil draining into the sewerB. using lots of water for irrigationC. lower average rainfall totalsD. swimming and fishing activities
43. Biologists observe and record the deer population. They notice that the population is 4 times larger than the habitat can support. Which is LEAST likely to occur from the overpopulation of deer?
A. The grass population in the deer’s habitat will begin to decrease.B. The deer population will be stronger and healthier.C. The area’s water source will be reduced or depleted.D. The deer will spread disease to other animals and humans.
43. Biologists observe and record the deer population. They notice that the population is 4 times larger than the habitat can support. Which is LEAST likely to occur from the overpopulation of deer?
A. The grass population in the deer’s habitat will begin to decrease.B. The deer population will be stronger and healthier.C. The area’s water source will be reduced or depleted.D. The deer will spread disease to other animals and humans.
44. Based on the information given in the table, why do overpopulated animals wander?
A. Their natural ecosystem can no longer support them.B. They migrate to compete with other species for garbage.C. Their natural ecosystem has a vast supply of food and water.D. They migrate to areas where there are fewer producers.
Effects of Overpopulation of Grazers
1. Wander into areas populated by humans.
2. Wander onto roads and highways and get killed.
3. Rummage through garbage and kill farm animas.
44. Based on the information given in the table, why do overpopulated animals wander?
A. Their natural ecosystem can no longer support them.B. They migrate to compete with other species for garbage.C. Their natural ecosystem has a vast supply of food and water.D. They migrate to areas where there are fewer producers.
Effects of Overpopulation of Grazers
1. Wander into areas populated by humans.
2. Wander onto roads and highways and get killed.
3. Rummage through garbage and kill farm animas.
45. Student are given an assignment to research and document the negative and positive effects of changes in ecosystems caused by humans. Which of the following tools would be most appropriate to use for this assignment?
A. notebookB. calculatorC. hand lensD. aquarium
45. Student are given an assignment to research and document the negative and positive effects of changes in ecosystems caused by humans. Which of the following tools would be most appropriate to use for this assignment?
A. notebookB. calculatorC. hand lensD. aquarium
46. A group of students is exploring the causes of change in the physical structure of a forest ecosystem. Each student in the group makes a prediction of how changes will impact the ecosystem. The students have each—
A. made a tableB. formed a hypothesisC. developed a modelD. planned an experiment
46. A group of students is exploring the causes of change in the physical structure of a forest ecosystem. Each student in the group makes a prediction of how changes will impact the ecosystem. The students have each—
A. made a tableB. formed a hypothesisC. developed a modelD. planned an experiment
47. In order to reduce the negative impact on the ecosystem, it is important that people —
A. make informed choices in conservationB. demonstrate safety practicesC. record data using technologyD. neglect wildlife regulations
47. In order to reduce the negative impact on the ecosystem, it is important that people —
A. make informed choices in conservationB. demonstrate safety practicesC. record data using technologyD. neglect wildlife regulations
48. In class, students learned that conserving water reduces the human impact on area watershed. Students want to investigate whether 4th or 5th graders use the most water when washing their hands. Which part of the investigation should be recorded?
A. height of the studentsB. time the faucet is turned onC. size of the sinkD. grade level of the students
48. In class, students learned that conserving water reduces the human impact on area watershed. Students want to investigate whether 4th or 5th graders use the most water when washing their hands. Which part of the investigation should be recorded?
A. height of the studentsB. time the faucet is turned onC. size of the sinkD. grade level of the students
49. Students are doing outdoor experiment in a marshy area. They are collecting water samples for viewing under the microscope to determine if pollution has impacted the health of the pond. The water is oily and shiny, and students are not sure what is in the water. All are good precautions to use while gathering the water samples EXCEPT—
A. wearing rubber glovesB. running around the pondC. keeping long hair tied backD. staying with the group
49. Students are doing outdoor experiment in a marshy area. They are collecting water samples for viewing under the microscope to determine if pollution has impacted the health of the pond. The water is oily and shiny, and students are not sure what is in the water. All are good precautions to use while gathering the water samples EXCEPT—
A. wearing rubber glovesB. running around the pondC. keeping long hair tied backD. staying with the group
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