Georgia Science Grade 6

Chapter 20: Our Impact on Land

CRCT Practice

1
Why do some farmers use no-till farming?
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A)to improve crop yields
B)to reduce soil erosion
C)to save fuel
D)to reduce the use of fertilizer
2
Which term means decreasing the amount of material used?
A)recycle
B)compost
C)reduce
D)reuse
3
Which term describes using land to grow crops and raise farm animals?
A)agriculture
B)landfill
C)development
D)remediation
4
Which material made up the largest portion of the municipal solid waste produced in the year 2000?
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A)plastics
B)paper
C)metals
D)wood
5
What percentage of waste was food scraps?
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A)11.2
B)6.7
C)5.5
D)37.4
6
Which term describes all the individuals of one species that occupy an area?
A)population explosion
B)carrying capacity
C)population
D)population limit
7
What percentage of municipal wastes were recycled in 2000?
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A)30.00%
B)30.10%
C)70.00%
D)16.20%
8
How much higher is the percentage of waste recycled in 2000 than in 1960?
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A)35.70%
B)25.00%
C)24.50%
D)20.00%
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