Soil Erosion and Conservation Quiz
Quiz
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Science
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5th Grade
•
Practice Problem
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Hard
Dervin Lewis
FREE Resource
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9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these does not cause weathering of rocks?
rain
pollution
wind
force of flowing water
Answer explanation
Weathering refers to the breakdown of rocks at or near the Earth's surface. It is caused by various physical and chemical processes. Rain, wind, and flowing water are all agents that can contribute to weathering. Pollution, while harmful to the environment in many ways, is not a direct physical force that causes rocks to break down.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these ways of soil erosion is not caused by humans?
deforestation
fast flowing river
overgrazing
ploughing
Answer explanation
While humans can contribute to increased river flow through activities like deforestation, the natural flow of a river itself is a geological phenomenon independent of human actions. Deforestation, overgrazing, and ploughing are all human activities that significantly increase soil erosion by removing vegetation cover that protects the soil from wind and water.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these can be caused by soil erosion?
drought
cyclone
flood
earthquake
Answer explanation
When soil is eroded, the protective layer of vegetation and topsoil is removed, exposing the underlying soil to the elements. This lack of vegetation cover makes the soil more susceptible to wind and water erosion, further exacerbating the drought conditions. Drought is a period of prolonged dryness, and with less vegetation to hold the soil in place, the erosion process intensifies, leading to a decrease in water retention capacity and even desertification in extreme cases.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these measures is most useful in preventing soil erosion by water in hilly areas?
covering the soil
building embankments
step farming
growing hedges along farmlands
Answer explanation
Terrace farming, or step farming, creates flat platforms on slopes, which slows down water flow, allowing it to infiltrate the soil rather than washing it away. This significantly reduces erosion and also increases the amount of cultivatable land on hillsides.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Soil takes more time to form than to get eroded.
Answer explanation
Yes, the statement is accurate. Soil formation is a very slow process, taking hundreds or even thousands of years to create a thin layer of topsoil. In contrast, soil erosion, the removal of topsoil by natural forces or human activities, can occur relatively quickly, even within a single year.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Roots of plants bind the soil particles and prevent soil erosion.
Answer explanation
Yes, it's true that plant roots play a crucial role in preventing soil erosion. They act as natural anchors, binding soil particles together and reducing the likelihood of them being washed away by wind or water. This binding effect is due to the physical presence of roots interwoven within the soil and also due to biological processes where roots release compounds that help cement soil particles together.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Soil erosion due to flowing water is more on hill slopes than on plains.
Answer explanation
Yes, it's true that soil erosion due to flowing water is generally more pronounced on hill slopes than on plains. This is primarily because steeper slopes cause water to flow faster, increasing its erosive power and ability to carry away soil particles.
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Soil in farmlands is less likely to get eroded after a crop is harvested
Answer explanation
No, it is incorrect to state that soil in farmlands is less likely to get eroded after a crop is harvested. In fact, the opposite is generally true. After a crop is harvested, the soil is often left bare and exposed, making it more susceptible to erosion from wind and water.
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Terrace farming is done mainly to reduce soil erosion due to wind.
Answer explanation
The statement is false. Terrace farming is primarily used to reduce soil erosion caused by water, not wind. While it can have some indirect effects on wind erosion, its main purpose is to create flat platforms on sloped land to slow down water runoff and prevent it from carrying away topsoil.
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