Factors in Ecosystems

Limiting factors are sometimes helpful because they can keep the population from getting too large.

• True
• False

Any thing or organism that regulates the size of a population of another organism is known as __________.

• a limiting measure
• a limiting factor
• factorization
• materialization of precipitation

If a disease destroying barley plants swept through an ecosystem, what would happen to the bird population that eat barley plants?

• The bird population would stay the same

• The bird population would infinitely increase

• The bird population would decrease

What happens when an environment reaches its carrying capacity?

• Populations will decrease
• Resources such as food, water, and space will be unlimited
• Populations will increase
• Nothing, everything will stay the same.

Temperature, light, air, water, and soil are all  _____  parts of the environment

• alive
• biotic 
• abiotic
• living

When a population grows past the ecosystem's carrying capacity, what happens to the population?

• Continues to grow
• The population starts to die off to return to carrying capcity
• The population will go extinct due to lack of resources
• The population grows then finds a new carrying capacity

Which of the following is NOT a biotic factor?

• Walrus
• Squid
• Salinity
• Algae

Living things depend on many different _________ in order to survive.

• resources
• environments
• ecosystems
• interactions

Environments include both _____ and _____ things.

• resources; factors
• air; water
• living; nonliving
• buildings; animals

Plants compete for air, water, ________ within ecosystems.

• space, and sound
• sunlight, and wind
• space, and sunlight