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PetMat · 3rd Grade (8-9)

Nature & science worksheet — 3rd Grade (ages 8-9)

Name:

Date:

1. What Is a Habitat?

Ecosystems Basics & Human Impact

1. What is a habitat?

AA type of food animals eat

BThe place where a living thing lives and finds what it needs

CA kind of weather

DA large ocean

2. Which of these is an example of a habitat?

AA supermarket

BA pond

CA road

DA factory

3. What do we call it when many different habitats are found together in a large area?

AA desert

BA city

CAn ecosystem

DA season

4. A forest and a river can both be habitats inside the same ecosystem.

True

False

5. Match each habitat to an animal that lives there.

		Your answer
1. Pond	A. Camel
2. Forest	B. Dolphin
3. Ocean	C. Deer
4. Desert	D. Frog

2. Plant Diagram Reading

Structure Of Living Things & Body Systems Intro

1. In a plant diagram, a label with an arrow pointing to the top colourful part says 'Used for reproduction'. Which part is this?

ARoot

BLeaf

CStem

DFlower

2. If a diagram shows water arrows entering from the soil, they should point towards the:

AFlower first

BLeaves first

CRoots first

DStem first

3. A plant diagram shows small dots on the leaves labelled 'tiny openings'. These are called:

ASeeds

BStomata

CPores only found in animals

DChloroplasts

4. Scientific diagrams use lines, arrows, and labels to explain complex ideas in a simple, visual way.

True

False

5. Match each arrow in a plant diagram to what it would represent.

		Your answer
1. Arrow from soil to roots	A. Pollen leaving the flower
2. Arrow from roots to stem	B. Sunlight reaching the leaf
3. Arrow from sun to leaf	C. Water moving up the plant
4. Arrow from flower outward	D. Water being absorbed

3. Why Water Is Important for Our Body

Food, Digestion Basics & Healthy Habits

1. What does water help carry around the body?

ABones

BNutrients and oxygen through blood

CChewed food

DHeat only

2. How does water help control body temperature?

ABy making us cold all the time

BThrough sweating, which cools us down

CBy stopping us from breathing

DIt has no effect on temperature

3. How does water help digestion?

AIt makes food harder to digest

BIt helps break down food and move it through the intestines

CIt replaces saliva completely

DIt stops the stomach from working

4. Our bodies are made up mostly of water.

True

False

5. Match each role of water to what it does in the body.

		Your answer
1. Transport	A. Cushions and lubricates bones
2. Temperature	B. Helps break down food in the stomach
3. Digestion	C. Helps cool the body through sweating
4. Joints	D. Carries nutrients and waste through the blood

4. Metamorphosis vs. Direct Development

Life Cycles & Reproduction (plants and Animals)

1. What is metamorphosis?

AWhen an animal builds a nest

BA dramatic change in body form during an animal's life cycle

CWhen a plant grows flowers

DAn animal moving to a warmer place

2. Which animal goes through metamorphosis?

ADog

BCat

CButterfly

DHorse

3. Which animal does NOT go through metamorphosis?

AFrog

BButterfly

CDog

DBeetle

4. In complete metamorphosis (like a butterfly), the animal passes through egg, larva, pupa, and adult stages.

True

False

5. Match each animal to the type of life cycle it has.

		Your answer
1. Butterfly	A. No metamorphosis (direct development)
2. Frog	B. No metamorphosis (direct development)
3. Dog	C. Incomplete metamorphosis
4. Bird	D. Complete metamorphosis

5. Broken Chains in Nature

Ecosystems Basics & Human Impact

1. In the food chain Leaves → Caterpillar → Bird → Cat, if all birds disappeared, what might happen to caterpillars?

ACaterpillars would disappear too

BCaterpillar numbers might grow very large

CCats would eat caterpillars instead

DNothing would happen

2. Why do scientists worry when an animal species becomes extinct?

ABecause extinct animals are boring

BBecause it can break food chains and affect many other species

CBecause it makes zoos empty

DBecause animals never die in nature

3. What does it mean when scientists say a food chain is 'out of balance'?

AThe food chain is on a seesaw

BOne part has grown too much or disappeared, upsetting all the others

CAll animals have the same amount of food

DThe food chain is working perfectly

4. Removing a herbivore from a food chain has no effect on the plants it used to eat.

True

False

5. Match each missing organism to the effect it would have on the food chain.

		Your answer
1. Bees disappear	A. Deer population grows too large
2. Frogs disappear	B. Rabbits have nothing to eat
3. Grass disappears	C. Insects they eat increase
4. Wolves disappear	D. Many plants are not pollinated

6. Comparing Leaves and Stems

Structure Of Living Things & Body Systems Intro

1. Which of these is a difference you might observe between leaves of different plants?

ASome leaves are alive, some are not

BSome leaves are smooth and some have jagged edges

CAll leaves are exactly the same size

DLeaves only come in one shade of green

2. A cactus has spines instead of flat leaves. This helps it to:

AMake more food

BLose less water in hot, dry conditions

CGrow taller

DAttract more insects

3. A tree trunk and a grass stem are both types of stem, but they differ in:

AColour only

BSize, thickness, and texture

CBeing alive or not

DThe type of soil they grow in

4. Scientists can compare leaves by looking at their shape, size, colour, and edge pattern.

True

False

5. Match each plant to a feature of its leaves or stem.

		Your answer
1. Oak tree	A. Long thin leaves and thin hollow stem
2. Pine tree	B. Oval leaves and thorny green stem
3. Rose bush	C. Needle-like leaves and rough bark stem
4. Grass	D. Large lobed leaves and thick woody trunk

7. Sorting Foods – Fruits and Vegetables

Food, Digestion Basics & Healthy Habits

1. Which of the following is a vegetable?

AApple

BCarrot

CCheese

DRice

2. Which food group do oranges and bananas belong to?

AGrains

BDairy

CFruits

DProteins

3. Why are fruits and vegetables important for our body?

AThey give us lots of fat

BThey provide vitamins and fibre

CThey make our teeth hurt

DThey are only for adults

4. A tomato is a type of fruit.

True

False

5. Match each food to its correct group.

		Your answer
1. Banana	A. Vegetable
2. Broccoli	B. Fruit
3. Strawberry	C. Vegetable
4. Spinach	D. Fruit

8. Basic Needs of Young Animals

Life Cycles & Reproduction (plants and Animals)

1. Which of the following is NOT a basic need of a young animal?

AFood

BWarmth

CA mobile phone

DProtection from danger

2. Why do young animals need warmth?

ATo run faster

BBecause their bodies cannot always regulate temperature on their own

CTo find food

DTo attract mates

3. What do most newborn mammals drink for their first food?

AWater only

BSolid meat

CMother's milk

DJuice

4. Young animals need protection because they are small and cannot defend themselves well.

True

False

5. Match each need with why young animals require it.

		Your answer
1. Food	A. Needed for digestion and body processes
2. Warmth	B. Keeps the young animal safe from predators
3. Protection	C. Keeps body functions working properly
4. Water	D. Provides energy and nutrients to grow

Nature & science worksheet — 3rd Grade (ages 8-9)

Answer Key

1. What Is a Habitat?

1.B) The place where a living thing lives and finds what it needs

2.B) A pond

3.C) An ecosystem

4.True

5.Pond → Frog, Forest → Deer, Ocean → Dolphin, Desert → Camel

2. Plant Diagram Reading

1.D) Flower

2.C) Roots first

3.B) Stomata

4.True

5.Arrow from soil to roots → Water being absorbed, Arrow from roots to stem → Water moving up the plant, Arrow from sun to leaf → Sunlight reaching the leaf, Arrow from flower outward → Pollen leaving the flower

3. Why Water Is Important for Our Body

1.B) Nutrients and oxygen through blood

2.B) Through sweating, which cools us down

3.B) It helps break down food and move it through the intestines

4.True

5.Transport → Carries nutrients and waste through the blood, Temperature → Helps cool the body through sweating, Digestion → Helps break down food in the stomach, Joints → Cushions and lubricates bones

4. Metamorphosis vs. Direct Development

1.B) A dramatic change in body form during an animal's life cycle

2.C) Butterfly

3.C) Dog

4.True

5.Butterfly → Complete metamorphosis, Frog → Incomplete metamorphosis, Dog → No metamorphosis (direct development), Bird → No metamorphosis (direct development)

5. Broken Chains in Nature

1.B) Caterpillar numbers might grow very large

2.B) Because it can break food chains and affect many other species

3.B) One part has grown too much or disappeared, upsetting all the others

4.False

5.Bees disappear → Many plants are not pollinated, Frogs disappear → Insects they eat increase, Grass disappears → Rabbits have nothing to eat, Wolves disappear → Deer population grows too large

6. Comparing Leaves and Stems

1.B) Some leaves are smooth and some have jagged edges

2.B) Lose less water in hot, dry conditions

3.B) Size, thickness, and texture

4.True

5.Oak tree → Large lobed leaves and thick woody trunk, Pine tree → Needle-like leaves and rough bark stem, Rose bush → Oval leaves and thorny green stem, Grass → Long thin leaves and thin hollow stem

7. Sorting Foods – Fruits and Vegetables

1.B) Carrot

2.C) Fruits

3.B) They provide vitamins and fibre

4.True

5.Banana → Fruit, Broccoli → Vegetable, Strawberry → Fruit, Spinach → Vegetable

8. Basic Needs of Young Animals

1.C) A mobile phone

2.B) Because their bodies cannot always regulate temperature on their own

3.C) Mother's milk

4.True

5.Food → Provides energy and nutrients to grow, Warmth → Keeps body functions working properly, Protection → Keeps the young animal safe from predators, Water → Needed for digestion and body processes