Introducing
Prezi AI.
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
Loading content…
Loading…
1
Transcript
7p 2번
2. 위 글의 주제로 가장 적절한 것은?
1.how to make erosion pins
2.finding a solution to wind erosion
3.various ways to prevent soil erosion
4.measuring soil erosion by using pins
5.making different kinds of erosion pins
In the 1990s, Ritchie and his team of researchers began to measure erosion rates by using simple tools known as erosion pins.
They were developed in the 1960s and 1970s by scientists working for the U.N. Food and Agriculture Organization.
By using many pins over a wide area and averaging their readings, scientists can determine an overall erosion rate for the area.
위 글에서 erosion pin으로 사용될 수 있는 것으로 언급된 두 가지를 찾아 영어로 쓰시오.
bamboo stakes or pieces of plastic pipe
Over time, if soil in the area is eroding, the soil surface will recede, and the erosion pins will be increasingly exposed.
The pins, each cut to a uniform length, are driven into the soil until their tops are level with the ground’s surface.
Erosion pins are spikes that can be made from almost anything, including bamboo stakes or pieces of plastic pipe.
Choose a template
Presentations from around the world
Learn more about creating dynamic, engaging presentations with Prezi