Plants: Structure, Function, and Importance - Year 3 Science Quiz

Question 1

In photosynthesis, what is the main job of chlorophyll?

Accepted Answer

To capture energy from sunlight

Answer

To make plants green

Question 2

Plants play a crucial role in food chains. How do they help maintain balance in ecosystems?

Accepted Answer

Plants create their own food using sunlight, which is then consumed by animals, who are in turn eaten by other animals.

Answer

Plants release oxygen for animals to breathe.

Answer

Plants help purify the air.

Answer

Plants are not essential in food chains.

Question 3

What do plants NOT need to grow healthily?

Accepted Answer

Human care

Answer

Sunlight

Answer

Water

Answer

Air

Question 4

What is NOT an advantage of the connection between plants and tiny living things in the soil?

Accepted Answer

Plants grow taller.

Answer

Plants can take in more nutrients from the soil.

Answer

Plants can better resist diseases.

Answer

Plants require less fertilizer.

Question 5

How do seeds help plants to survive and spread?

Accepted Answer

Seeds protect the baby plant inside from harm.

Accepted Answer

Seeds can travel far away from the parent plant, helping the plant to spread.

Accepted Answer

Seeds store food for the baby plant to use when it starts to grow.

Answer

Seeds can only survive in very specific conditions.

Question 6

Imagine a plant is placed in a shady area where it doesn't get much sunlight. How do you think this will affect the plant's growth?

Accepted Answer

The plant's growth will be slower.

Answer

The plant will grow taller to reach more sunlight.

Answer

The plant will not be affected because all plants need the same amount of sunlight.

Answer

The plant will produce more leaves to capture more sunlight.

Question 7

How could we test if different colors of light help plants grow taller?

Accepted Answer

Put plants in boxes with different colored paper over them and measure how tall they are after a week.

Answer

Plant seeds in soil and give them different amounts of water.

Answer

Count the leaves on plants growing in different places around a tree.

Answer

Put plants in a dark room and see if they grow.

Question 8

Which of these is NOT a function of plant hormones?

Accepted Answer

Preventing leaves from falling in autumn

Answer

Ripening fruits

Answer

Dividing and growing cells

Question 9

How does photosynthesis benefit living things on Earth?

Accepted Answer

It produces oxygen and removes carbon dioxide from the air.

Accepted Answer

It creates food for plants, animals, and humans.

Answer

It helps regulate the Earth's temperature.

Answer

It helps plants grow taller and stronger.

Question 10

How do plants sense changes in their environment, such as light, touch, or gravity?

Accepted Answer

Plants have special cells that can detect these changes.

Answer

Plants use their leaves to sense changes in the environment.

Answer

Plants can only respond to changes in temperature.

Answer

Plants don't have any way of knowing what's happening around them.

Question 11

Which of these is not a part of a plant?

Accepted Answer

Animal

Answer

Stem

Answer

Leaf

Answer

Flower

Question 12

Mycorrhizal fungi are tiny creatures that live on the roots of some plants. What is their most important job?

Accepted Answer

Help the plant absorb nutrients from the soil

Answer

Help the plant absorb water from the soil

Answer

Help the plant make its own food

Question 13

Which of these is NOT required for photosynthesis in plants?

Accepted Answer

Nitrogen

Answer

Sunlight

Answer

Water

Answer

Carbon dioxide

Question 14

What are the three main stages of a plant's life cycle?

Accepted Answer

Seed, germination, seedling

Answer

Pollination, fertilisation, seed dispersal

Answer

Germination, pollination, fruit formation

Answer

Seed, seedling, flower

Question 15

Which of these is an example of a monocotyledon?

Accepted Answer

Grass

Answer

Oak

Answer

Rose

Answer

Sunflower

Question 16

What is the job of the stem in a plant?

Accepted Answer

To transport water and nutrients

Answer

To absorb sunlight

Answer

To store food

Answer

To reproduce

Question 17

What is the process where plants use sunlight to make their own food?

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Transpiration

Answer

Germination

Question 18

Which of these trees loses its leaves in autumn?

Accepted Answer

Oak

Answer

Pine

Answer

Palm

Answer

Cactus

Question 19

What gas do plants release into the air during photosynthesis?

Accepted Answer

Oxygen

Answer

Carbon dioxide

Answer

Water vapour

Answer

Nitrogen

Question 20

Which of these plants eats insects?

Accepted Answer

Venus flytrap

Answer

Rose

Answer

Sunflower

Answer

Daisy

Question 21

Which plant loves to spread its seeds like tiny parachutes in the wind?

Accepted Answer

Dandelion

Answer

Apple tree

Answer

Rose bush

Answer

Sunflower

Question 22

Where do plants keep their precious seeds safe and sound?

Accepted Answer

Fruit

Answer

Stem

Answer

Leaves

Answer

Roots

Question 23

Which plant part is like a highway for water and food to travel?

Accepted Answer

Stem

Answer

Roots

Answer

Leaves

Answer

Flowers

Question 24

What do plants do to release water into the air, like when you sweat?

Accepted Answer

Transpiration

Answer

Photosynthesis

Answer

Breathing

Answer

Growing

Question 25

Which of these is NOT a type of plant?

Accepted Answer

Fish

Answer

Flowers

Answer

Pine trees

Answer

Ferns

Question 26

What gives plants their beautiful green colour and helps them make food?

Accepted Answer

Chlorophyll

Answer

Red blood cells

Answer

Brown stuff

Answer

Yellow stuff

Question 27

What is the process by which plants make their food using sunlight, water, and air?

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Evaporation

Answer

Transpiration

Question 28

Which of these is NOT a stage in the life cycle of a plant?

Accepted Answer

Sleeping

Answer

Seed dispersal

Answer

Flowering

Answer

Growing

Question 29

How do plants help keep the air we breathe balanced?

Accepted Answer

They make oxygen through photosynthesis and take in carbon dioxide.

Answer

They take in oxygen through photosynthesis and release carbon dioxide.

Answer

They release both oxygen and carbon dioxide through photosynthesis.

Answer

They don't have much to do with the air we breathe.

Question 30

What are the little holes on leaves called that help plants breathe?

Accepted Answer

Stomata

Answer

Sunspots

Answer

Pores

Answer

Air vents

Question 31

What is the part of a flower that makes pollen?

Accepted Answer

Stamen

Answer

Pistil

Answer

Petal

Answer

Sepal

Question 32

Why is it good to have many different types of plants and animals in an ecosystem?

Accepted Answer

It makes the ecosystem stronger and more able to handle changes.

Answer

It means there is more competition for food.

Answer

It can make the ecosystem less stable.

Answer

There is no benefit to having many different types of plants and animals.

Question 33

What do plants mainly use for energy?

Accepted Answer

Sunlight

Answer

Water

Answer

Soil

Answer

Air

Question 34

Which part of the plant soaks up water and nutrients from the ground?

Accepted Answer

Roots

Answer

Stem

Answer

Leaves

Answer

Flowers

Question 35

What's the green stuff in plant leaves that helps them make food?

Accepted Answer

Chlorophyll

Answer

Water

Answer

Oxygen

Answer

Carbon dioxide

Question 36

Which of these is a good example of a tree?

Accepted Answer

Oak

Answer

Rose

Answer

Daisy

Answer

Strawberry

Question 37

Which of these is NOT a living part of a plant?

Accepted Answer

Soil

Answer

Root

Answer

Leaf

Answer

Stem

Question 38

What do we call the way plants grow towards the sun?

Accepted Answer

Tropism

Answer

Photosynthesis

Answer

Transpiration

Answer

Germination

Question 39

Which of these can grow back naturally?

Accepted Answer

Trees

Answer

Oil

Answer

Coal

Answer

Water

Question 40

What is the green stuff in plants that helps them make their own food?

Accepted Answer

Chlorophyll

Answer

Water

Answer

Glucose

Answer

Oxygen

Question 41

Which of these plants eats insects?

Accepted Answer

Venus flytrap

Answer

Rose

Answer

Sunflower

Answer

Tulip

Question 42

What are the different parts of a flower called?

Accepted Answer

Petals, sepals, stamens, pistil

Answer

Roots, stems, leaves, flowers

Answer

Leaves, seeds, fruit, roots

Answer

Bud, stem, leaf, root

Question 43

Which of these is a fruit?

Accepted Answer

Apple

Answer

Potato

Answer

Carrot

Answer

Spinach

Question 44

What do the tiny hairs on a plant's roots do?

Accepted Answer

Suck up water and food

Answer

Hold the plant in the ground

Answer

Store food

Answer

Make flowers

Question 45

Which of these can be replaced over time, like a tree?

Accepted Answer

Plants

Answer

Fossil fuels

Answer

Minerals

Answer

Water

Question 46

Which part of a plant takes in water and nutrients?

Accepted Answer

Root

Answer

Stem

Answer

Leaf

Answer

Flower

Question 47

What substance in plants helps them make their own food?

Accepted Answer

Chlorophyll

Answer

Carotenoids

Answer

Anthocyanin

Answer

Tannins

Question 48

What is the flower's job?

Accepted Answer

To make seeds

Answer

To absorb sunlight

Answer

To store water

Answer

To hold up the stem

Question 49

Which one can grow back over time?

Accepted Answer

Trees

Answer

Coal

Answer

Oil

Answer

Water

Question 50

What process do plants use sunlight for?

Accepted Answer

Making food

Answer

Breathing

Answer

Moving water

Answer

Sprouting

Question 51

What part of the plant carries water from its roots?

Accepted Answer

Xylem

Answer

Phloem

Answer

Epidermis

Answer

Cambium

Question 52

What is the green-colored substance in plant leaves that helps them make their own food?

Accepted Answer

Chlorophyll

Answer

Oxygen

Answer

Water

Answer

Sugar

Question 53

Which part of the plant absorbs water and nutrients from the soil?

Accepted Answer

Roots

Answer

Stem

Answer

Leaves

Answer

Flowers

Question 54

What is the process called when plants use sunlight, water, and carbon dioxide to make their own food?

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Transpiration

Answer

Pollination

Question 55

Which of these is NOT a part of a flower?

Accepted Answer

Leaves

Answer

Petals

Answer

Sepals

Answer

Stamen

Question 56

What are the small openings on the underside of leaves called that allow gases to enter and exit the plant?

Accepted Answer

Stomata

Answer

Lenticels

Answer

Tracheids

Answer

Vacuoles

Question 57

What is the process called when plants lose water through their leaves?

Accepted Answer

Transpiration

Answer

Evaporation

Answer

Condensation

Answer

Precipitation

Question 58

Which of these is NOT a stage in a plant's life cycle?

Accepted Answer

Butterfly

Answer

Seed

Answer

Flower

Question 59

Which part of the plant sucks up water from the earth?

Accepted Answer

Roots

Answer

Stem

Answer

Leaves

Answer

Flower

Question 60

Which of these plants eats insects?

Accepted Answer

Venus flytrap

Answer

Sunflower

Answer

Daisy

Answer

Rose

Question 61

What do 'recyclers' in nature do?

Accepted Answer

Break down dead plants and animals

Answer

Make oxygen

Answer

Clean water

Answer

Provide homes for animals

Question 62

Which of these trees has needles?

Accepted Answer

Pine tree

Answer

Oak tree

Answer

Rose bush

Answer

Fern

Question 63

What's the job of the 'tubes' that carry water up a plant?

Accepted Answer

To pump water and minerals up

Answer

To send food down

Answer

To hold the plant up

Answer

To store food and water

Question 64

Which part of the plant takes in water and nutrients from the soil?

Accepted Answer

Roots

Answer

Stem

Answer

Leaves

Answer

Flowers