Grade 9 Exam Revision

Which of these levels of organization includes all the other levels?

• community

• ecosystem

• individual

• population

Lack of iron in seawater can restrict the growth of certain plankton populations. What kind of factor is iron for marine plankton?

• distribution

• tolerance

• limiting

• biotic

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which type of heterotroph best describes this hyena?

• herbivore

• carnivore

• omnivore

How does energy first enter a pond ecosystem?

• through growth of algae

• through light from the sun

• through decay of dead fish

• through runoff from fields

What is the name of the process in which bacteria and lightning convert nitrogen into compounds that are useful to plants?

• ammonification

• denitrification

• nitrate cycling

• nitrogen fixation

Tags

NGSS.MS-LS2-3

Which of the following is NOT a process in the water cycle?

• precipitation

• evaporation

• condensation

• runoff

Tags

NGSS.MS-ESS2-4

Which term best describes this collection of locations: a forest, a freshwater lake, a desert?

• genetic diversity

• extinction

• ecosystem diversity

• species diversity

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NGSS.MS-LS2-2

NGSS.MS-LS2-5

One of the factors that is increasing the current rate of extinction is ___________, or excessive use of species that have economic value.

• overexploitation

• natural resources

• habitat fragmentation

• edge effect

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NGSS.HS-LS2-7

NGSS.HS-LS4-5

______________ occurs when fertilizers, animal waste and sewage flow into waterways.

• acid precipitation

• eutrophication

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-5

Those resources that are replaced by natural processes faster than they are consumed are called ______________.

• nonrenewable resources

• renewable resources