12/06/22 Life Processes
21/04/23
Life Processes
21/04/23
• Serious efforts to discover life on other planets have been going on for many years.
• If extra-terrestrial beings really were discovered how would scientists decide if they were alive?
A simple way of sorting everything on our planet is to divide it into 2 groups – living things and non-living things.
Signs of life
21/04/23
Life ProcessesAll living things have to perform seven life processes. Do you know what they are?
Each letter in the phrase ‘MRS GREN’ gives you the first letter of one of the life processes.
Movement
Respiration
Sensitivity
Reproduction
Growth
Excretion
Nutrition
If something does not perform all of the seven life processes then it is not alive.
For something to be classed as Dead it must have been alive once !!
21/04/23
The 7 Life ProcessesMovement
Respiration
Sensitivity
Reproduction
Growth
Excretion
Nutrition
21/04/23
Exercise 1: Animal Movement
1. Why do animals move?
Type of movement
Example of animal
Walking
Crawling
Running
Flying
Swimming
Jumping
Swinging
Humans
Insect
Horse
Bird
Fish
Kangaroo
Chimpanzee
To find food, water, shelter, to hide from predators and to reproduce.
2. Copy and complete the table below:
21/04/23
Plant Movement
1. Do plants move?•Yes, plants do move, but very slowly compared to most animals.
•Plants move towards sunlight which they need to make food.•Some flowers close during the night.•Roots will move towards water and gravity.
2. Why do plants move?
21/04/23
Respiration•Respiration is the process by which energy is released from our food.•This energy is used for the organism to perform the other life processes.
•Most of our food is digested down to glucose.
•This joins with oxygen to release the energy and gives off the waste products carbon dioxide and water.
Glucose + Oxygen ENERGY + Carbon dioxide + Water
21/04/23
Match the word to its correct meaning:
1 respiration 2 oxygen 3 carbon dioxide 4 water
5 energy
6 transport systems
A is a poisonous by-product of respiration. B take materials to and from respiring cells.
C is needed to release energy from glucose in the body.
D the process that releases energy from food.
E is made when energy is released from food.
F is needed to do the rest of MRSGREN.
D the process that releases energy from food.
C is needed to release energy from glucose in the body.
A is a poisonous by-product of respiration. E is made when energy is released from food.
F is needed to do the rest of MRS GREN.
B take materials to and from respiring cells.
21/04/23
Exercise 2: Respiration 1. Which gas is required for respiration?
2. What are the waste products of respiration?
3. Write a word equation for the process of respiration.
4. What is the chemical test for carbon dioxide gas?
Oxygen.
Water and Carbon dioxide.
Food + Oxygen Energy + Carbon dioxide + Water
It turns limewater milky (and then clear again).
21/04/23
True or false?
1. Respiration means breathing.
2. Respiration occurs in all body cells.
3. Respiration gives out oxygen.
4. Carbon dioxide is used up by respiration.
5. Respiration is a chemical process that releases energy.
6. Plants do not respire.
FALSE
TRUE
FALSE
FALSE
TRUE
FALSE
21/04/23
Living things ____________ to produce offspring.
Animals also _________ to catch food, to find a mate and
also to escape any predators.
As we get older, we ______ to reach our full size.
We use energy to do different things. Releasing energy
from food is called ____________ and eating the food we
require is called __________ .
Any waste produced is ________ from our bodies.
Living things must also react to what happens to them.
This is called _________ .
move reproduce sensitivity nutrition excreted
respiration grow
21/04/23
SensitivitySensitivity is the ability of living things to detect changes in their surroundings and respond to these changes.
Humans have five senses; do you know what they are?
TouchTasteSmellSight
Hearing
SkinTongueNoseEyesEars
Which organs are associated with these
senses?
21/04/23
Exercise 3: Sensitivity1. What is sensitivity?
2. Complete the table below:
3. Name two animals that can hear ultrasound.
Sense Body part
Sight
Ear
Taste
Nose
Touch
Eye
Hearing
Tongue
Smell
Skin
Being able to detect and respond to your surroundings.
Dogs and bats.
21/04/23
Growth
Animals grow until they reach adulthood and then
stop growing.
Plants continue to grow throughout their lives.
21/04/23
Animal ReproductionAll organisms need to reproduce. Reproduction is the making of new organisms. If organisms did not reproduce, then once those organisms died there would be no more of the species left.
Some animals reproduce by laying eggs.
Example: Birds
Some animals reproduce by giving birth to live young.
Example: Mammals
Adult and young kangaroo
Mammals suckle their young - the females provide milk for their offspring.
21/04/23
Exercise 5: Link the Matching Pairs
Acorn
Cub
Calf
Baby
Pup
Lion
Seal
Oak tree
Human
Whale
21/04/23
Plant ReproductionSome plants reproduce using the wind to carry pollen from one flower to another.
Some plants reproduce using insects or birds to carry pollen from one flower to another.
Why are insects attracted to flowers?
They are attracted by scent, colour and nectar.
21/04/23
Excretion
Carbon dioxide is a waste product of respiration. What is the other waste product? HINT! Breathe on a mirror.
Excretion is the process where an organism gets rid of waste products that would otherwise cause it harm.
The waste products of respiration are carbon dioxide and water.
Breathe through a tube into a beaker of limewater. What
do you observe?
What happened to the limewater? It went milky.
What does this tell you?
There is more carbon dioxide in the air we breathe out than the air we breathe in.
21/04/23
Exercise 6: Removing Waste
1. What do we call the process that remove waste products from an organism?
2. What are the waste products of respiration?
3. How do we remove carbon dioxide from our body?
4. What would happen if we did not remove this carbon dioxide?
Excretion.
Water and carbon dioxide.
We breathe it out.
It would poison our bodies and eventually kill us.
21/04/23
Nutrition
CARNIVORES.
Animals eat food. Some animals eat other animals. What do we call these types of animals?
Nutrition is the obtaining of food to keep an organism healthy.
Some animals eat plants What do we call these animals?
HERBIVORES.
Animals that eat plants and animals are called OMNIVORES.
Green plants make their own food using sunlight, water and carbon dioxide. This process is called PHOTOSYNTHESIS.
A carnivore
21/04/23
Exercise 7: Link the Word with the Description
Carnivore
Omnivore
Photosynthesis
Carbon dioxide
Herbivore
Plant-eating animals
Meat-eating animals
The gas needed by green plants to make food
Animals that eat meat and plants
The process by which green plants make food using sunlight
21/04/23
Exercise 8: Insert the Key Words
Animals must eat food to gain nutrition. Animals that eat plants are called _________. Animals that eat ____ are called carnivores. Animals that eat meat and plants are called _________.
Green plants gain nutrition by making their own food using _______, water and oxygen. This process is called _____________.
meat omnivores photosynthesis
herbivores sunlight
herbivoresmeat
omnivores
sunlightphotosynthesis