Ecosystems

A place where living and nonliving things interact

• population

• community

• ecosystem

• nutrient cycle

Which aquatic ecosystem has both salt and fresh water that is mixed together (brackish water)?

• estuary
• lakes
• ponds
• oceans

Identify the ecosystem

• Forest

• Tundra

• Freshwater

• Desert

Which of the following is an abiotic factor that plants depend on?

• seed-eating birds

• insect pollinators

• ants building their nests in trees

• nutrients in the soil

Which of the following is a biotic factor?

• humans

• bridges

• roads

• water

Identify the ecosystem

• Forest

• Tundra

• Freshwater

• Grassland

Prairies, steppes, and savannas are all types of ____________. 

• forests
• grasslands
• wetlands
• estuaries

_____________ are bodies of freshwater that are surrounded by land.

• Oceans
• Estuaries
• Lakes/Ponds
• Forests

Biotic factors are...

• living things

• non-living things

• undead things

This ecosystem has very few trees and a lot of varieties of grasses.

• Forest
• Grassland
• Wetland
• Lakes/Ponds