Land Biomes and Aquatic Ecosystems

An ecosystem has :

• living things
• living and nonliving things
• nonliving things
• nothing

This is a wetland marsh composed of a mixture of both salt and freshwater (brackish water) because this is where a river flows into the ocean. What type of ecosystem is it?

• estuary

• fen

• bog

• river

Wetlands are good for everything EXCEPT...?

• they help filter dirty water

• they provide a habitat for many plants and animals

• they help control flooding

• throwing old tires in

A living or once-living organisms in an ecosystem is a

• population
• biotic factor
• abiotic factor
• community

Bromeliads (pictured here) have long, stiff leaves that collects rainwater that provides the plant with nutrients. They grow on trees to get sunlight for photosynthesis. Which biome does it grow in?

• Taiga

• Tropical Rainforest

• Temperate Deciduous Forest

• Temperate Rainforest

Which of the following is not an abiotic factor?

• pH

• temperature

• salinity

• grass

Which of the following is not a biotic factor?

• mushroom
• air
• elephant
• coyote

What biome is this?

• deciduous forest

• taiga

• desert

• grassland

Is a weather an abiotic or biotic factor? 

• abiotic
• biotic

This biome has very little rainfall, extremely cold temperatures for most of the year, and has frozen soil called permafrost.

• Deciduous forest

• Tundra

• rain forest

• Grassland