8 th Grade Science T-Cap Practice Chemical Reactions Forces of Nature Q 100 Q 200 Q 300 Q 400 Q 500 Q 100 Q 200 Q 300 Q 400 Q 500 Solids, Liquids, Gases,

8th Grade Science T-Cap Practice

Chemical Reactions

Forces of Nature

Q 100

Q 200

Q 300

Q 400

Q 500

Q 100 Q 100Q 100 Q 100

Q 200 Q 200 Q 200 Q 200

Q 300 Q 300 Q 300 Q 300

Q 400 Q 400 Q 400 Q 400

Q 500 Q 500 Q 500 Q 500

Solids, Liquids, Gases, Oh My!

Life Science

Odds ‘n Ends

100 Question Chemical Reactions

The pH of a weak acid is

A 9.1

B 8.2

C 7.0

D 6.5

100 Answer Chemical Reactions

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D 6.5

200 Question Chemical Reactions

A student applies heat to a solid substance. Which indicates that a chemical change occurred?

A.The substance becomes a liquid but solidifies when cooled. B.The substance changes color and stays that color when cooled.C. The substance goes from liquid to gas very quickly.D. The substance expands but stay s the same color.

200 Answer Chemical Reactions

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B. The substance changes color and stays that color when cooled.

300 Question Chemical Reactions

Which of these represent chemical change?

A. A match lit, creating a yellow-orange flameB. A small piece of ice melts, changing from a solid to a liquidC. A ball of clay sinks in the water, and floats when reshaped.D. A pot of water is heated to boiling, and evaporation occurs.

300 Answer Chemical Reactions

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A. A match lit, creating a yellow-orange flame

400 Question Chemical Reactions

A chemical equation is shown below:

The element zinc (Zn) can best be described as a A.CompoundB.MixtureC.GasD.reactant

400 Answer Chemical Reactions

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D. Reactant

(Starting material in a chemical reaction)

500 Question Chemical Reactions

Which sample equation best illustrates the law of conservation of mass?

A.12 grams reactant X + 10 grams reactant Y ---- 2 grams product Z

B.5 grams reactant E + 5 grams reactant F --- 20 grams product G + 5 grams product H

C.4 grams reactant U + 3 grams reactant V --- 7 grams product W

D.10 grams reactant Q + 9 grams reactant R --- 90 grams product S + 90 grams product T

500 Answer Chemical Reactions

??C. 4 grams reactant U + 3

grams reactant V --- 7 grams product W

100 Question

The Arctic environment has temperatures that range between -22° C and 6° C with snow covering some of the area. Which adaptation would most likely help a population of organisms survive this environment?

A.Long necks and tall legsB.Large shell and leathery skinC.Light colored fur and layers of blubberD.Brightly colored feathers and webbed feet

Life Science

100 Answer Life Science

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C. Light colored fur and layers of blubber

200 Question

A student observes a tree with small needle-like leaves that stay green year round. Which conclusion can the student

draw from the shape of the leaves? A.The leaves of the tree do not perform photosynthesis.B.The leaves of the tree have an illness that stunts their growth.C.The leaves of the tree are nonfunctional.D.The leaves of the tree are intended to reduce water loss.

200 Answer Life Sciences

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D. The leaves of the tree are intended to reduce water loss.

300 Question Life Science

Which organisms are most likely to

be the same approximate age?A.1 and 3B.3 and 5C.2 and 4D.5 and 6

Compare the fossil layers

300 Answer Life Science

??

C. 2 and 4

400 Question Life ScienceTwo fossils

that appear to be from the same type of organism are found in two different layers of rock. The layers of rock are shown here.

Which can be determined from the location of the fossils?

A.The prey of the organismsB.The predators of the organismC.The cause of death for each organismD.The relative age of each organism

400 Answer Life Science

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D. the relative age of each organism

500 Question Life Science

To what class does the organism

belong?

A.Cestoda B.

Gastropoda

C. Trematoda D. Bivalvia

500 Answer Life Science

??

B. Gastropoda

100 Question Forces of Nature

What keeps earth in its orbit?

A.The rotation of earthB.The gravity of the sunC.The revolution of the moonD.The gravity of the moon

100 Answer Forces of Nature

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B. The gravity of the sun

200 Question Forces of Nature

A nuclear power plant has recently been built to generate electricity for a town located near several small lakes. Which is not a benefit of this nuclear power plant being built?

A.The cost of the electricity will decrease.B.The loss of habitat for local wildlife.C.The heating of homes will be easier.D.The nuclear power plant will supply jobs.

200 Answer Forces of Nature

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B. The loss of habitat for local wildlife.

300 Question Forces of Nature

A student coils a copper wire around a bar magnet. Which action will cause the device to generate electricity?

A. The student connects the copper wire to a light bulb.B. The student insulates the copper wire with plastic.C. The student uses a horseshoe magnet instead of a bar magnet.D. The student moves the bar magnet through the copper wire coils.

300 AnswerForces of Nature

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D. The student moves the bar magnet through the copper wire coils.

400 Question Forces of Nature

Wire coils spinning between two magnets will produce

A.coldB.electricityC.steamD.chemicals

400 Answer Forces of Nature

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B. Electricity

500 Question Forces of Nature

Which diagram shows an apparatus that is correctly set up to produce and measure electricity?

500 Answer Forces of Nature

??

100 Question Solids, Liquids , Gases Oh My!

The graph below represents the percentages of gases that make up the atmosphere of Earth.

Which gas is represented in the portion labeled 1 on the graph?

A.ArgonB.HydrogenC.NitrogenD.Oxygen

100 Answer Solids, Liquids , Gases Oh My!

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C. Nitrogen

200 Question Solids, Liquids , Gases Oh My!

Which diagram best shows the type of particle arrangement associated with a gas?

200 Answer Solids, Liquids , Gases Oh My!

??

300 Question Solids, Liquids , Gases Oh My!

A student performed a classroom investigation by mixing a purple liquid and a white powder. Diagrams of the setup and the resulting blue solid are shown.

The student could best classify this reaction as a A.Physical change B. Weight changeC. mass change D. Chemical change

300 Answer Solids, Liquids , Gases Oh My!

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D. Chemical change

400 Question Solids, Liquids , Gases Oh My!

A student designs an experiment to test the acidity of the water in several ponds near an industrial area. Which tool would best help a student obtain accurate data? A.Oxygen probe

B.Metric ruler

C.pH indicator

D.Heat sensor

400 Answer Solids, Liquids , Gases Oh My!

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C. pH indicator

500 Question Solids, Liquids , Gases Oh My!

Which properties most likely indicate that a substance is a base?A.Releases hydrogen gas and reacts with metalsB.Turns red litmus blue and conducts an electric currentC.Turns blue litmus red and conducts an electric currentD.Has a pH below seven and corrodes a nail

500 Answer Solids, Liquids , Gases Oh My!

??(Bases feel slippery, change litmus blue, and become less basic when mixed with acids)

B. Turns red litmus blue and conducts an electric current

100 Question odds and ends

The main biofuel on the market today is ethanol, a fuel made from corn. Which type

of bioengineered product is ethanol?

A.AdaptiveB.AssistiveC.ResistantD.Manipulated

100 Answer odds and ends

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A.Adaptive

200 Question odds and ends

Which statement best describes what the planet Saturn, a lizard, and a steaming kettle have in common?

A. All are made of atoms. B. All are multicellular organisms.C. All are at the same internal temperature.D. All produce their own energy without help.

200 Answer odds and ends

??

A. All are made of atoms?

300 Question

Odds and Ends

A student observes that a gas is formed when chemical Y is added to chemical Z in the lab. The student’s observation of a new product being formed is the common outcome of all

A. Physical changesB. Chemical changesC. Mass changesD. Phase changes

300 Answer Odds and Ends

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B. Chemical Changes

400 Question Odds and Ends

The molecular arrangement of a solid is best represented ina.Diagram 3b.Diagram 1c.Diagrams 1 and 2d.Diagrams 2 and 3

400 Answer Odds and Ends

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B. Diagram 1

500 Question Odds and Ends

A 5-gram sample of water occupies 5 milliliters of space in a beaker. Using the formula, what is the density of the water sample?A.1 gram/milliliterB.5 grams/milliliterC.10 grams/milliliterD.25 grams/milliliter

500 Answer odds and ends

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A. 1 gram/milliliter