Distribution of Earth’s Water. The Oceans Water covers about 75% of the Earth’s surface 97% is salt water 3% is fresh water only 1% of fresh water can be used. There are 4 major bodies of water: Atlantic Ocean Pacific Ocean Indian Ocean Arctic Ocean.
Water covers about 75% of the Earth’s surface
97% is salt water
3% is fresh water
only 1% of fresh water can be used
Ice- 76% of fresh water - Most of Earth’s fresh water is locked in thick sheets of ice near the North and South Poles. - Icebergs – huge chunks of floating ice made of fresh water.
Rivers and Lakes
a. Tributary – streams and smaller rivers that feed into a main river
b. Watershed – land area that supplies water to a river system.
c. Divide – separates one watershed from another by a ridge of land
Lakes- Body of fresh water that no sunlight reaches the bottom- Deep and big- Formed two ways Same as a pond Powerful forces that shape Earth’s surface such as ice depressions, crust movement or volcanoes
Wetlands – a land area that is covered with water during part or all of the year.
How People Use Fresh Water
Pollution – addition of any substance that has a negative effect on water or the living things that depend on the water