1. D O N OW – I N N OTEBOOKS List some important properties or facts about water.

2. S TATISTICS Water covers 75% of Earth 60% of the human body is made up of water People in North America use ~106 gallons of water every day Agriculture accounts for ~80% of water consumption worldwide 97.5% of the earth's water is saltwater. If the world's water fit into a bucket, only one teaspoonful would be drinkable. Humans can live for up to a month without food, but only 2 days without water

3. Oceanography

4. WATER Essential Question: Why is water essential to life on Earth? Objectives: Discuss and investigate properties of water

5. W ATER F ACTS Exists in solid, liquid and gas forms Covers 70% - 75% of Earth 4 Oceans: Pacific, Atlantic, Indian, Arctic N. Hemisphere: 61% S. Hemisphere: 81% Average Depth: 3,800m

6. W ATER F ACTS 97% Saltwater 3% Freshwater Most freshwater located in glaciers Sea Level Level of ocean water Varies due to melting of glaciers

7. W ATER – P HYSICAL P ROPERTIES Water is tasteless and odorless Water is transparent - light can pass through Water is a strong solvent, mixes well with other substances (salt, sugar, CO 2 ) Water is less dense as a solid than a liquid

8. W ATER – P HYSICAL P ROPERTIES Chemical Formula: H 2 O Boiling temp: 100ºC Freezing temp: 0ºC Very high Specific Heat Takes a lot of energy to raise the temperature

9. Water Cycle

10. W ATER C YCLE Evaporated from Earth’s surface Transpired from trees and plants Condensed into water droplets, forms clouds Precipitates back to Earth Runoff into large bodies of water, enters ground The cycle repeats

11. S O WHY IS WATER SO IMPORTANT ? Determines climate and weather Shapes the landscapes on Earth through weathering and erosion Supports life on Earth (Plants and Animals) Agriculture, Drinking Form of energy Hydroelectric power Recreation Cleaning – shower, clothes

12. P ROPERTIES OF W ATER Cohesion Water molecules sticking together Adhesion Water molecules sticking to other substances Surface Tension Waters resistance to objects attempting to break through its surface