Ecosystems Unit Test

Rocks, temperature, and water are what part of the environment?

• biotic
• abiotic
• population

What do several different populations living together make?

• A biosphere
• An organism
• A community

Which is an example of an abiotic element changing an area?

• introducing a new type of grass
• water flooding the area
• two species of brids competing

Grass that gains energy from the sun is an example of a:

• parasite
• decomposer
• producer

A diagram with arrows showing energy flow from grass, to a rabbit, to a fox is:

• An energy pyramid
• a food web
• a food chain

In a food web, arrows point in just one direction because they show:

• which animals are related
• how energy goes to the animal that is eating
• how energy fos to the animal that is eaten

After one species disappears, the other species in the ecosystem:

• are thrown out of balance
• die
• are unaffected

Limiting factors determine an area's carrying capacity because:

• ecosystems are small
• animals need resources to survive
• the number of animals is unlimited

Two members of the same species fight over who gets a certain food. Members of different species try to take over a certain nesting area. These are both examples of:

• community
• competition
• mutualism

In which type of symbiosis do organisms help each other?

• Parasitism
• Mutualism
• Community