Interactions of Living Things

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

• biotic
• abiotic
• population
• living

What do several different populations living together make?

• a biosphere
• an organism
• a community
• an ecosystem

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

• introducing a new type of grass
• water flooding an area
• two species of birds competing
• algae growing on crabgrass

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

• consumer
• 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
• a population chart

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

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

After one species disappears, the other species in the ecosystem

• benefit
• are thrown out of balance
• die
• are unaffected

Limiting factors determine an area's carrying capacity because

• the number of animals is limited
• 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
• commensalism

In which type of symbiosis do organisms help each other?

• parasitism
• mutualism
• community
• ecosystem