Georgia Science Grade 6

Chapter 7: Weathering and Soil

CRCT Practice

1
Which method for reducing soil erosion is shown on the hillsides in the photo?
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A)no-till farming
B)terracing
C)contour farming
D)shelter belts
2
Which soil horizon often has a dark color because of the presence of humus?
A)E horizon
B)C horizon
C)B horizon
D)A horizon
3
According to the table, which horizon in this soil has the lowest percentage of sand?
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A)A horizon
B)B horizon
C)C horizon
D)R horizon
4
Which of the following is the R horizon?
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A)topsoil
B)humus
C)bedrock
D)gravel
5
Which of the following might damage a soil's structure?
A)a gentle rain
B)organic matter
C)earthworms
D)compaction
6
Which of the following is most likely to cause erosion of farmland during a severe drought?
A)water runoff
B)soil creeping downhill
C)wind
D)ice
7
What is the total amount of phorphorus lost from each acre?
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A).61 kg
B)16.20 kg
C)15.59 kg
D)16.81 kg
8
What is the difference between the amount of phosphorus added and the amount of phosphorus lost?
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A)2.99 kg
B)6.10 kg
C)9.09 kg
D)5.00 kg
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