Think of a piece of paper that is enhanced to grow forever. This would
fit the definition of a plane. A plane is a flat surface that has no
thickness. A plane contains an infinite number of lines and extends
without end in the directions of its lines.
Less than a percent (1.2%) of the earth's total water is Surface and aquifer freshwater sources hold.
Earth is 70% covered in water. Of this water, 97% is saline water which is found in the ocean and the rest is fresh water. Less than 1% of the earth's surface fresh water is in ground and surface water. And about 2% is available in the form of glaciers. Only 1% of aquifer water is usable in the form of rivers, lakes, or ponds. The atmosphere also holds some quantity of water in the form of tiny droplets.
In the US 49% of fresh water is used in electricity production by thermal electric power production,31% in agriculture irrigation,11% for public use, and the rest for industries as compared to developing countries where 70% is used in agriculture or industries.
Read about the distribution of water:
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Answer:
an ice sheet covering a considerable part of a continent
Answer:
The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma. At the center of the Earth is a hot, dense metal core.
