Ecosystems Basics
Biomes & Climate
Living Roles & Interactions
Layers & Environments
Putting It All Together
100

A community of living and nonliving things interacting in one area is called this.

Ecosystem

100

This describes the long-term weather patterns of a region.

Climate

100

An organism’s role or job in an ecosystem is called this.

Niche

100

Plants growing beneath taller trees in a forest make up this layer.

Understory

100

A pond ecosystem includes both living and nonliving components such as fish and this.

Sunlight

200

All living things in an ecosystem are called this.

Biotic factors
200

Large regions with similar climate and organisms are called this.

Biomes

200

The place where an organism lives is called this.

Habitat

200

Very little sunlight reaches this part of a dense rainforest.

Forest floor

200

Algae and fish in a pond are examples of this type of factor.

Biotic factors

300

Water, sunlight, and temperature are examples of this.

Abiotic factors
300

This biome is known for extremely low rainfall, not necessarily extreme heat.

Desert

300

A fish eating smaller organisms is an example of this ecological role.

Niche

300

This imaginary line marks where trees stop growing on a mountain.

Tree line

300

Oxygen in the water is an example of this type of factor.

Abiotic factor
400

A pond, forest, or desert can each be considered this type of system.

Ecosystem

400

This frozen ground layer is found in tundra regions.

Permafrost

400

This field of science studies interactions between organisms and their environment.

Ecology

400

This aquatic environment may have zones based on depth and light availability.

Lake/ocean ecosystem

400

Grasslands and savannas are known for supporting many of these animals.

Grazing animals

500

The largest level of ecological organization that includes all ecosystems is this.

Biosphere

500

In forests, this layer is made up of tall trees forming a “roof.”

Canopy

500

This describes how ecosystems can be divided into regions based on factors like depth or elevation.

Zonation

500

These regions in ecosystems are shaped by abiotic factors like sunlight and temperature.

Zones/zonation areas

500

Scientists divide the biosphere into smaller regions to make it easier to study. These are called this.

Biomes