What is an Ecosystem?
Food Chains & Food Webs
Cycles in Nature
Photosynthesis & Energy Flow
Ecosystem Changes
100

What is an ecosystem?

An ecosystem is all the living and nonliving things in an area that interact.

100

What does a food chain show?

How energy moves from one organism to another.

100

What cycles through an ecosystem?

Matter like water, carbon, and nutrients.

100

What is photosynthesis?

The process plants use to make food from sunlight, water, and carbon dioxide.

100

What happens when an ecosystem is disrupted?

Organisms may struggle to survive or move away.

200

Name one type of ecosystem.

Forest, desert, ocean, or grassland.

200

What is a producer?

An organism that makes its own food, like a plant.

200

What is the water cycle?

The movement of water through evaporation, condensation, and precipitation.

200

What do plants need for photosynthesis?

Sunlight, water, and carbon dioxide.

200

Name one way humans disrupt ecosystems.

Pollution, deforestation, or building cities.

300

What do living things in an ecosystem need?

Food, water, shelter, and space.

300

What is a consumer?

An organism that eats other organisms.

300

How do plants get nutrients?

From the soil and water.

300

What is the role of the sun in ecosystems?

It provides energy for plants to make food.

300

What is invasive species?

Non-native species that harm the ecosystem.

400

What is a nonliving part of an ecosystem?

Sunlight, water, soil, or air.

400

What is a decomposer?

An organism that breaks down dead plants and animals.

400

What is decomposition?

The process of breaking down dead plants and animals.

400

What is an herbivore?

An animal that eats only plants.

400

How do ecosystems recover from disruption?

Through natural processes or human help like conservation.

500

How do ecosystems change?

They change naturally or because of human activity.

500

Why are food webs better than food chains?

Because food webs show many connected food chains.

500

Why are cycles important?

They recycle nutrients needed for life.

500

How does energy flow in an ecosystem?

From the sun to producers to consumers and decomposers.

500

Why is it important to protect ecosystems?

To keep plants, animals, and humans healthy and balanced.