Presentation on theme: "Earth’s surface is covered mainly by water."— Presentation transcript:
1Essential question: How does Earth’s water move through the water cycle? Standard 6.4.2
2Earth’s surface is covered mainly by water. Oceans cover about 70% of our planet’s surface.
3What is the Water Cycle?Earth has been recycling its water supply for 4 billion years.The Water Cycle is the continuous process by which water moves from Earth’s surface to the atmosphere and back.Driven by energy from the SUN.
5Processes of the Water Cycle The Sun heats up the water in Earth’s oceans and lakes.
6Processes of the Water Cycle 2. Evaporation: liquid water changes to a gas called water vapor.
7Processes of the Water Cycle Transpiration: water vapor is released by plants.
8Processes of the Water Cycle 3. Condensation:Warm air carries water vapor upward.The air cools and condenses into liquid water.Tiny droplets of water clump together around tiny dust particles in the air, forming clouds.
9Licancabur Volcano is located on the border between Chile and Bolivia.
10If a cloud is on, or just above, Earth’s surface, it is called FOG.
11Processes of the Water Cycle 4. Precipitation:As more water vapor condenses, the drops of water grow larger and heavier.The heavy droplets fall as precipitation (rain, snow, sleet, hail).
12Processes of the Water Cycle 5. The precipitation that falls on land may:soak into the soil and become groundwaterORRun off the land, eventually flowing back into the ocean.
16How is Earth’s Water Distributed? About 97% of Earth’s water is salt water found in oceans.Only 3% is freshwater.
17How is Earth’s Water Distributed? Oceans: the Pacific, Atlantic, Indian, and Arctic Oceans are all interconnected, covering the majority of Earth’s surface.
18How is Earth’s Water Distributed? Ice: most of Earth’s freshwater is locked in thick sheets of ice near the Earth’s poles.
19How is Earth’s Water Distributed? Rivers and Lakes: Only 0.02% of Earth’s water, but an important source of freshwater for people who live near them.The Great Lakes contain almost 20% of all the water in Earth’s freshwater Lakes
20How is Earth’s Water Distributed? Groundwater: water that fills the cracks and spaces in underground soil and rock layers.
22How does Earth’s water move through the water cycle? Summarize. The ______ powers the _______ ________. Water vapor _________ to form clouds. Clouds produce _________. Precipitation either becomes _______ ______ or ______ ________ into lakes and streams. Water _______ from the land and bodies of water. Water also leaves plants through a process known as ____________. The cycle begins again.