Ecosystems and Interactions: Online Learning Quizzes for 4th Grade Science

Question 1

Which living thing in an ecosystem makes its own food?

Accepted Answer

Grass

Answer

Rabbit

Answer

Mushroom

Question 2

Which of the following is a living thing that makes its own food using sunlight?

Accepted Answer

Grass

Answer

Rabbit

Answer

Hawk

Answer

Bacteria

Question 3

What is the name for all the different food chains that are connected in an ecosystem?

Accepted Answer

Food web

Answer

Habitat

Answer

Population

Answer

Community

Question 4

How do animals get energy in an ecosystem?

Accepted Answer

From eating other animals or plants

Answer

Directly from sunlight

Answer

Through photosynthesis

Answer

From breaking down dead plants and animals

Question 5

Which of these things helps keep an ecosystem healthy and balanced?

Accepted Answer

Having lots of different plants and animals

Answer

Having very few disturbances, like storms or fires

Answer

Having a lot of one type of plant or animal

Answer

Having no decomposers

Question 6

What do decomposers do in an ecosystem?

Accepted Answer

Break down dead plants and animals

Answer

Make oxygen

Answer

Eat plants

Answer

Hunt other animals

Question 7

How does competition affect animals in an ecosystem?

Accepted Answer

It makes it harder for them to find food and shelter

Answer

It makes there be more different types of animals

Answer

It helps animals work together better

Answer

It doesn't really affect them

Question 8

Which of the following is NOT part of an ecosystem?

Accepted Answer

A plastic bag

Answer

Living organisms

Answer

Their physical environment

Answer

Interactions between organisms

Question 9

What is a group of organisms that live in the same area and interact with each other called?

Accepted Answer

Ecosystem

Answer

Biosphere

Answer

Habitat

Answer

Food web

Question 10

Which of the following makes its own food from sunlight?

Accepted Answer

Plants

Answer

Animals

Answer

Fungi

Answer

Bacteria

Question 11

How are food chains and food webs different?

Accepted Answer

Food webs show more possible food pathways.

Answer

Food chains only include plants and animals.

Answer

Food webs show the movement of energy.

Answer

Food chains are more common in nature.

Question 12

How do decomposers help in an ecosystem?

Accepted Answer

Break down waste and recycle nutrients.

Answer

Produce oxygen through photosynthesis.

Answer

Control the population of predators.

Answer

Eat only plants.

Question 13

What breaks down dead leaves and logs in a forest?

Accepted Answer

Mushroom

Answer

Grass

Answer

Deer

Answer

Sunlight

Question 14

What do decomposers do in an ecosystem?

Accepted Answer

Break down dead plants and animals

Answer

Make food for other organisms

Answer

Eat other animals

Answer

Provide shelter for other organisms

Question 15

Where does most of the energy in an ecosystem come from?

Accepted Answer

Sunlight

Answer

Wind

Answer

Water

Answer

Soil

Question 16

Which of these is NOT found in a food web?

Accepted Answer

The weather

Answer

Plants that make their own food

Answer

Animals that eat other animals

Answer

Animals that break down dead plants and animals

Question 17

How are food chains different from food webs?

Accepted Answer

Food chains show how energy flows through an ecosystem, while food webs show how organisms interact with each other.

Answer

Food webs show how energy flows through an ecosystem, while food chains show how organisms interact with each other.

Answer

They are the same thing.

Answer

Food chains include only plants, while food webs include all organisms.

Question 18

In a forest ecosystem, which organism makes its own food?

Accepted Answer

Tree

Answer

Rabbit

Answer

Mushroom

Answer

Wolf

Question 19

Which of the following is NOT part of an ecosystem?

Accepted Answer

Human activities and buildings

Answer

Living organisms (plants, animals)

Answer

Non-living things (water, rocks, air)

Answer

Food chains and food webs

Question 20

What do we call a group of the same type of living things that live in the same area?

Accepted Answer

Population

Answer

Community

Answer

Ecosystem

Answer

Habitat

Question 21

Which type of organism starts a food chain?

Accepted Answer

Producer

Answer

Consumer

Answer

Decomposer

Answer

Predator

Question 22

Which of these is an example of animals helping each other?

Accepted Answer

A shark swimming next to a remora

Answer

A lion eating a zebra

Answer

A fungus growing on a tree

Answer

A bee collecting pollen from a flower

Question 23

How do changes to one living thing affect the rest of an ecosystem?

Accepted Answer

It can change food chains and how nutrients move through the system

Answer

They usually don't affect other living things

Answer

Only changes to plants and animals affect other living things

Answer

Decomposers are the only ones that can affect the whole ecosystem

Question 24

Which of the following is the primary role of producers in a food chain?

Accepted Answer

Produce their own food

Answer

Consume other organisms

Answer

Decompose organic matter

Answer

Provide shelter for other organisms

Question 25

Which type of interaction between living organisms involves both species benefiting?

Accepted Answer

Mutualism

Answer

Competition

Answer

Predation

Answer

Parasitism

Question 26

A habitat can be defined as:

Accepted Answer

The specific area where an organism lives

Answer

The diet of an organism

Answer

The function an organism serves in its environment

Answer

The number of individuals in a population

Question 27

Which physical adaptation helps animals survive in cold environments?

Accepted Answer

Thick fur or feathers

Answer

Large ears

Answer

Long tails

Answer

Striped patterns

Question 28

Which of the following describes the general pattern of energy flow through an ecosystem?

Accepted Answer

From producers to consumers to decomposers

Answer

From consumers to producers to decomposers

Answer

From decomposers to producers to consumers

Answer

Energy does not flow through ecosystems

Question 29

What is the main difference between a food chain and a food web?

Accepted Answer

Food chains are linear while food webs are interconnected

Answer

Food webs are linear while food chains are interconnected

Answer

Food chains only include plants and animals while food webs include non-living things

Answer

There is no difference between food chains and food webs

Question 30

What is the primary role of decomposers in an ecosystem?

Accepted Answer

To decompose dead organisms and recycle nutrients

Answer

To produce food for other organisms

Answer

To control populations of other organisms

Answer

To provide shelter for other organisms

Question 31

How can human activities, like adding pollution to the air or cutting down forests, impact ecosystems?

Accepted Answer

They can disrupt the stability and functioning of ecosystems.

Answer

They help ecosystems become more balanced.

Answer

They have no effect on ecosystems.

Question 32

What do we call the different connected food chains in an ecosystem?

Accepted Answer

Food web

Answer

Habitat

Answer

Niche

Answer

Population

Question 33

Which of these is a plant that makes its own food?

Accepted Answer

Grass

Answer

Hawk

Answer

Snake

Answer

Mouse

Question 34

What do we call the special place where an animal lives and gets its food?

Accepted Answer

Habitat

Answer

Environment

Answer

Community

Answer

Population

Question 35

Which of these is NOT a sign of a healthy ecosystem?

Accepted Answer

Plenty of pollution

Answer

Lots of different types of living things

Answer

Clean air and water

Answer

Animals and plants depending on each other

Question 36

Which animal plays a very important role in its ecosystem even though it is not very big?

Accepted Answer

Bacteria

Answer

Grass

Answer

Shark

Answer

Hawk

Question 37

Why are food webs helpful for scientists?

Accepted Answer

They show how energy moves through the ecosystem

Answer

They tell us which animals are in danger

Answer

They stop pollution

Answer

They make new plants grow

Question 38

In an ecosystem with diverse plants and animals, what is the primary function of a keystone species?

Accepted Answer

Maintaining ecosystem balance and health

Answer

Dominating the ecosystem's population

Answer

Being the apex predator

Answer

Having minimal impact on other species

Question 39

Which adaptation helps polar bears survive in their icy environment by keeping them warm?

Accepted Answer

Thick fur

Answer

Webbed feet

Answer

Echolocation

Answer

Poisonous claws

Question 40

How can we use our understanding of ecosystems to safeguard the diversity of life on Earth?

Accepted Answer

Study ecosystems to learn about human impacts and find ways to minimize harm

Answer

Ignore ecosystems

Answer

Build new ecosystems to replace damaged ones

Question 41

In a food chain, who or what fills the role of producing their own food from sunlight?

Accepted Answer

Plant

Answer

Hawk

Answer

Snake

Answer

Mouse

Question 42

Most ecosystems on Earth rely on a common source for their energy. What is it?

Accepted Answer

Sun

Answer

Water

Answer

Rocks

Answer

Moon

Question 43

Which of these animals eats only plants?

Accepted Answer

Deer

Answer

Lion

Answer

Owl

Answer

Frog

Question 44

What is the important job that decomposers do in an ecosystem?

Accepted Answer

Break down dead plants and animals, returning nutrients to the soil

Answer

Provide food for other organisms

Answer

Create new organisms

Answer

Protect the ecosystem from predators

Question 45

When two organisms have a close relationship in which both benefit, it's called:

Accepted Answer

Mutualism

Answer

Predation

Answer

Competition

Answer

Parasitism

Question 46

What simple actions can we take to protect the health of ecosystems?

Accepted Answer

Reduce waste, reuse items, recycle materials

Answer

Cut down more trees

Answer

Drive more often

Answer

Use more energy

Question 47

Why is having a variety of species in an ecosystem important?

Accepted Answer

It makes the ecosystem more stable and able to recover from changes

Answer

It means there will be more food for humans

Answer

It makes the ecosystem more fragile and at risk

Question 48

What is a producer in a food chain?

Accepted Answer

An organism that makes its own food, such as plants

Answer

An organism that eats other organisms, such as a deer

Answer

An organism that breaks down dead organisms, such as a hawk

Answer

An organism that eats plants and other animals, such as a snake

Question 49

What do decomposers do in an ecosystem?

Accepted Answer

They break down dead plants and animals into nutrients that can be used by other organisms.

Answer

They provide shelter for animals.

Answer

They produce food for other organisms.

Answer

They consume plants and animals.

Question 50

Which type of organism in an ecosystem eats both plants and animals?

Accepted Answer

Omnivore

Answer

Producer

Answer

Carnivore

Answer

Herbivore

Question 51

What is the name of the area where an organism lives and gets its resources?

Accepted Answer

Habitat

Answer

Food chain

Answer

Ecosystem

Answer

Population

Question 52

What is a characteristic of a healthy ecosystem?

Accepted Answer

Balanced populations of different species

Answer

High levels of pollution

Answer

Few different types of plants and animals

Answer

Frequent storms and natural disasters

Question 53

Where do most ecosystems get their energy from?

Accepted Answer

Sunlight

Answer

Minerals

Answer

Water

Answer

Wind

Question 54

What can limit the number of organisms in an ecosystem?

Accepted Answer

Availability of resources, such as food and water

Answer

Lack of sunlight

Answer

No predators

Answer

Too much rain

Question 55

What type of interaction occurs when organisms compete for the same resources?

Accepted Answer

Competition

Answer

Predation

Answer

Symbiosis

Answer

Mutualism

Question 56

Which of these is an example of a symbiotic relationship?

Accepted Answer

A lichen, which is a fungus and an alga living together

Answer

A deer eating grass

Answer

A plant absorbing sunlight

Answer

A fox hunting a rabbit

Question 57

What is the process by which plants use sunlight to make their own food called?

Accepted Answer

Photosynthesis

Answer

Combustion

Answer

Decomposition

Answer

Respiration