Water is always moving in a continuous cycle. What is the name of this process?
Water cycle
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Explain evaporation.
When the sun heats up the water in the oceans, rivers, lakes, the water evaporates and turns into the gas called water vapour.
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What is precipitation?
Any form of water that falls from the sky. Examples : rain, snow, sleet. hail
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Explain how a waterfall is formed.
River flows over hard rock - Soft rock will erode forming a small step - more soft rock erode, larger step - eventually leading the the formation of a waterfall
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Where Rivers start from?
mountains.
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What is the largest river in the world
The Amazon
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What is the longest river in the world?
the Nile.
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What is a spring?
Water that runs through the ground and comes out from an opening
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What are meanders?
Wide S-shaped bends
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What is a tributary?
A small river that joins the main river and makes the main river larger.
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The side of a river is called the.... The bottom of the river is called the ______bed
bank / bed
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To turn (change) from a gas into a liquid.
condense
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What is a dam and why do we build it?
We build a dam to stop the flow of river. Water is collected and held in a reservoir. we use them for crops, drinking water, and hydroelectric power.
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The measure of how much water vapor is in the air is called ______.
humidity
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The temperature at which water vapor in the air condenses into water.