Science Chapter 4 Changes in Ecosystems

When an area undergoes a disaster, such as a forest fire, and the area is left with soil, it is called ________________________ ________________________.

• urbanization

• secondary succession

• primary succession

• biodiversity

The number and variety of organisms is _____________________________.

• eutrophication

• conservation

• biodiversity

• urbanization

Tags

NGSS.MS-LS2-5

The protection and wise use of natural resources is called ______________________________.

• biodiversity

• urbanization

• succession

• conservation

A __________________ _____________________ is the first species to appear after a disaster in an area.

• pioneer species

• primary succession

• keystone species

• secondary succession

When a disaster strikes, such as a volcano erupts, and the area is left with only bare rock, it is called _____________________________ _______________________.

• primary succession

• secondary succession

• natural eutrophication

• biodiversity

___________________________________ happens when too many nutrients get into a body of water and cause algae to grow.

• succession

• eutrophication

• biodiversity

• urbanization

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

How is secondary succession different from primary succession?

• Secondary succession occurs after a disturbance in an area that was previously uninhabited.

• Secondary succession occurs after a disturbance in an area in which the soil has remained intact.

• Secondary succession occurs over a longer period of time than primary succession.

• Secondary succession occurs when animals are introduced to an area that had only plants.

How do pioneer species make ecological succession possible on an island formed from volcanic eruptions?

• They use chemicals to produce food.

• They establish homes in which animals can live.

• They break down rock into soil in which plants can grow.

• The adjust the climate by altering the average temperature in a region.

Tags

NGSS.MS-LS2-2

Which statement best describes ecosystems?

• They can never change once they are established.

• They constantly change in different ways over time.

• Ecosystems always revert back to their original state.

• Each ecosystem can exist for only a specific length of time.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which term best describes the number and variety of organisms in a given area during a specific period of time?

• carrying capacity

• biodiversity

• succession

• eutrophication

Tags

NGSS.MS-LS2-5