Ecosystems and Biomes

The organisms in an ecosystem are called:

• abiotic environment

• biotic community

• biome

• ecosystem

The term for precipitation and temperature in an environment is called:

• abiotic environment

• biome

• humus

• climate

The non-living environment is called:

• abiotic environment

• biotic community

• climate

• biome

A biome is:

• decaying plant and animal matter in soil

• the non-living environment

• a large area with similar climate and ecosystems

• the organisms in an ecosystem

The name for decaying plant and animal matter in the soil is called:

• decomposer

• humus

• leaching

• biome

Leaching is:

• a species that no longer exists

• decaying plant and animal matter in the soil

• rainwater removing nutrients from the soil

• the non-living environment

An example of an extinct species is:

• red panda

• cougar

• black-footed ferret

• passenger pigeon

All of the following are reasons soil crumbs are important EXCEPT:

• spaces between crumbs allow plant roots to spread out

• spaces between allow air into the soil

• provide food for decomposers

• help keep the soil moist and excess water to drain

Which biome has the thickest layer of topsoil?

• grassland

• forest

• desert

What is the correct order of particle size in soil from largest to smallest?

• gravel, silt, clay then sand

• gravel, sand, silt then clay

• clay, silt, sand then gravel

• clay, gravel, sand then silt