Grade 3 STEM Worksheet: Ecosystems Skill Builder

Ecosystems Skill Builder

Grade 3 STEM Ecosystems Skill Builder Challenging 25 Questions 22 Views

Classroom Worksheet

Grade 3 STEM Worksheet: Ecosystems Skill Builder

Ecosystems Skill Builder

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Grade: Grade 3

Subject: STEM

Topic: Ecosystems

Time: 20 Minutes

Difficulty: Challenging

Questions: 25

Instructions:
Read each question carefully. Use what you know about plants, animals, habitats, and food chains to answer. Write your answers in complete sentences when needed. Questions get harder as you go.

Skills Practiced:

Ecosystems
STEM
Critical Thinking
Problem Solving

1Question

What is an ecosystem?

2Question

Name one living thing found in an ecosystem.

3Question

Name one nonliving thing found in an ecosystem.

4Question

Which part of an ecosystem do plants need to grow: sunlight or a flashlight?

5Question

What do animals need to survive in most ecosystems: air, water, and food or only water?

6Question

What is a habitat?

7Question

Name one habitat where fish can live.

8Question

Why do birds build nests?

9Question

What do we call a plant that makes its own food using sunlight?

10Question

What do we call an animal that eats plants or other animals?

11Question

Which is a producer: grass or rabbit?

12Question

Which is a consumer: deer or tree?

13Question

Put these in order to show a simple food chain: grass, grasshopper, bird.

14Question

In a food chain, what does the arrow show?

15Question

What might happen to a rabbit population if there is very little grass?

16Question

How can a pond ecosystem be different from a desert ecosystem?

17Question

Why are worms helpful in soil?

18Question

What would happen to many plants if a long drought happened?

19Question

How can one dead tree be important to an ecosystem?

20Question

Choose the best example of a predator and prey pair: hawk and mouse or cow and grass.

21Question

Why do some animals migrate to different places?

22Question

What might happen if all the bees disappeared from a garden ecosystem?

23Question

Explain how sunlight helps a forest ecosystem.

24Question

A new pond is built in a field. Name two living things that might move into or live near the pond.

25Question

Think of a local ecosystem. Describe one living thing, one nonliving thing, and one way they depend on each other.

Answer Key

#	Answer
1	An ecosystem is a place where living things and nonliving things interact.
2	A plant, animal, or fungus is a living thing in an ecosystem.
3	Water, sunlight, air, soil, or rocks are nonliving things in an ecosystem.
4	Plants need sunlight to grow.
5	Animals need air, water, and food to survive.
6	A habitat is the place where a plant or animal lives.
7	Fish can live in a pond, lake, river, or ocean.
8	Birds build nests to keep their eggs and babies safe.
9	A producer.
10	A consumer.
11	Grass is a producer.
12	Deer is a consumer.
13	Grass → grasshopper → bird.
14	The arrow shows what eats what or where energy goes.
15	The rabbit population may decrease because there is less food.
16	A pond has lots of water and many water plants and animals, while a desert is very dry and has fewer water-loving living things.
17	Worms help break down dead material and make soil healthy.
18	Many plants would have trouble growing or might die because they do not get enough water.
19	A dead tree can become a home or food source for insects, birds, and fungi.
20	Hawk and mouse is a predator and prey pair.
21	Some animals migrate to find food, water, warmer weather, or a safer place.
22	Many flowers might not get pollinated, so some plants would make fewer fruits and seeds.
23	Sunlight helps plants make food, and plants are the beginning of many food chains in the forest.
24	Frogs, fish, ducks, insects, turtles, and plants might live near the pond. Any two are correct.
25	Example: In a backyard ecosystem, a tree is a living thing, sunlight is a nonliving thing, and the tree depends on sunlight to make food. Answers may vary.