7th Grade Science STAAR Review

What is biodiversity?

• Maintaining something at a stable level

• All of the living and non-living things in an environment

• All of the members of the same species in an area

• All of the different types of living things

What is an ecosystem?

• Maintaining something at a stable level

• All of the living and non-living things in an environment

• All of the members of the same species in an area

• All of the different types of living things

What is sustainability?

• Maintaining something at a stable level

• All of the living and non-living things in an environment

• All of the members of the same species in an area

• All of the different types of living things

What is a population?

• Maintaining something at a stable level

• All of the living and non-living things in an environment

• All of the members of the same species in an area

• All of the different types of living things

Biodiversity makes an ecosystem ______ stable

• More

• Less

• Equally

• Not

All of the following are catastrophic events, except...

• Tornado

• Hurricane

• Wildfire

• Thunderstorm

• Earthquake

Which type of ecological succession occurs in places that have never had an ecosystem before?

• Primary succession

• Secondary succession

Which type of ecological succession occurs in places that had an ecosystem that was destroyed by a catastrophic event?

• Primary succession

• Secondary succession

What is the correct order of the stages of ecological succession?

• Shrubs, Lichens, Grasses/Flowers, Trees

• Lichens, Grasses/Flowers, Shrubs, Trees

• Trees, Shrubs, Grasses/Flowers, Lichens

• Lichens, Grasses/Flowers, Trees, Shrubs

There are many processes at work in the human stomach. The stomach is part of which larger system?

• circulatory

• digestive

• nervous

• respiratory