Unit 15
Unit 15
학년 · 단어 14개 · 표현 17개 · Q&A 0개
기적의 직독직해 120A
단어14 words
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erosion
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removal
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gravity
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surface
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peak
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valley
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coastline
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stream
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muddy
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rainstorm
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landscape
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area
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pebble
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glacier
문장17 expressions
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wear away
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take place
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carry away
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Water, wind, and ice wear away the land.
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This is called erosion.
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Erosion is the removal of rocks and soil by wind, water, ice, and gravity.
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Erosion changes the earth’s surface.
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This can change mountain peaks, valleys, and coastlines.
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Erosion can happen quickly or take thousands of years.
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Do you know why streams and lakes get muddy after a rainstorm?
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It is a sign that erosion is taking place.
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Rainstorms change the landscape.
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Wind causes erosion, especially in dry areas.
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Wind picks up and carries away sand, light rocks, and pebbles.
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Wind changes the landscape, too.
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Ice causes erosion in cold areas.
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Giant rivers of ice, called glaciers, move slowly and change the valleys and mountains.
질문 & 답변0 항목
Q
A
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