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15
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The land becomes infertile due to ......................, .................... or ....................... which causing desertification.
deforestation, drought, or overgrazing
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monster
Reset all scores!
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seesaw
Swap points!
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gift
Win 15 points!
Okay!
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lifesaver
Give 25 points!
Oops!
15
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Increasing the inclination of Earth's surface leads to the increase of ...................... process of the soil.
erosion
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15
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Adding sand and ............................ to the soil helps in decreasing the effect of moving ....................... over the soil.
silt - water
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15
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Give reasons: The increase in the inclination of Earth's surface causes the erosion of the soil.
Because the increase in the inclination of Earth's surface leads to increasing the speed of moving water over the Earth's surface.
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15
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To reduce the erosion process, ........................... areas should be increased.
planted
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boom
Lose 50 points!
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magnet
Take 25 points!
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shark
Other team loses 10 points!
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thief
Give points!
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25
15
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Overuses of ............................ and .......................... cause depletion of the soil
pesticides and chemical fertilizers
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15
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What are the ways to reduce soil erosion?
Increasing planted areas - Digging canals or trenches - Adding sand and silt to the soil
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15
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What happens when soil particles are washed away by moving water?
Soil erosion occurs
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