Tennessee Science Grade 8

Chapter 3: Conserving Life

TCAP Preparation

1
Which of these sentences gives the best definition of biodiversity?
A)Biodiversity concerns the seasonal movements of fish in rivers.
B)Biodiversity is the total variety of plants in a field.
C)Biodiversity is the total variety of organisms in an ecosystem.
D)Biodiversity is the study of climate changes.
2
Part of Earth's atmosphere is made of ozone. The ozone layer
A)transmits sunlight
B)concentrates the Sun's energy
C)releases warmth
D)blocks ultraviolet radiation
3
Global warming may be caused by
A)carbon dioxide gas
B)coastal flooding
C)the polar ice caps
D)acid rain
4
One of the reasons that scientists are concerned that the ozone layer may be thinning is that ozone loss may
A)slow down global warming
B)divide habitats
C)capture species
D)result in more skin cancer
5
Which of the following species cannot be reintroduced into the wild?
A)a threatened species
B)an introduced species
C)a captive species
D)an extinct species
6
Occasionally, conservation biologists hold members of a species captive for breeding in order to
A)reintroduce the species
B)protect an endangered habitat
C)get legal protection
D)restore a lost habitat
7
Which of the following does not promote biodiversity?
A)an ecosystem's stability
B)a climate's temperature range
C)a species' resistance to disease
D)an arid environment
8
Some animal species move into new ecosystems as a result of human activities. When this happens, that species is called
A)reintroduced
B)introduced
C)endangered
D)captive
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