Question

how does the water cycle maintain the amount of water on earth.​

Answer 1

Answer:

Water is one of the key ingredients to life on Earth. About 75 percent of our planet is covered by water or ice. The water cycle is the endless process that connects all of that water. It joins the Earth’s oceans, land, and atmosphere.

The Earth’s water cycle began about 3.8 billion years ago when rain fell on a cooling Earth, forming the oceans. The rain came from water vapor that escaped the magma in the Earth’s molten core into the atmosphere. Energy from the sun helped power the water cycle and Earth’s gravity kept water in the atmosphere from leaving the planet.

The oceans hold about 97 percent of the water on Earth. About 1.7 percent of Earth’s water is stored in polar ice caps and glaciers. Rivers, lakes, and soil hold approximately 1.7 percent. A tiny fraction—just 0.001 percent—exists in the Earth’s atmosphere as water vapor.

When molecules of water vapor return to liquid or solid form, they create cloud droplets that can fall back to Earth as rain or snow—a process called condensation. Most precipitation lands in the oceans. Precipitation that falls onto land flows into rivers, streams, and lakes. Some of it seeps into the soil where it is held underground as groundwater.

When warmed by the sun, water on the surface of oceans and freshwater bodies evaporates, forming a vapor. Water vapor rises into the atmosphere, where it condenses, forming clouds. It then falls back to the ground as precipitation. Moisture can also enter the atmosphere directly from ice or snow. In a process called sublimation, solid water, such as ice or snow, can transform directly into water vapor without first becoming a liquid.

Answer 2

Energy from the sun helped power the water cycle and Earth's gravity held water in the air back from leaving the planet.

How is it so?

• The seas hold around $97%$ per cent of the water on Earth.
• Around $1.7$per cent of Earth's water is put away in polar ice covers and glacial masses.
• Streams, lakes, and soil hold roughly $1.7$ per cent.

How does the water cycle change how much water is in the water table?

• Variances in the water table level are brought about by changes in precipitation among seasons and years.
• During pre-spring and spring, when snow melts and precipitation is high, the water table ascents.
  There is a slack, in any case, between when precipitation penetrates the immersed zone and when the water table ascents.

How much has water on the Earth changes?

• Most importantly, water on the Earth and in its climate stays steady as it goes through the water cycle.