1. Hydrosphere Review

2. What is the structure of water? Water is a compound that contains two hydrogen atoms (+) and one oxygen atom (-). Due to the electrical charges water is known as a polar molecule. Chemical formula is H 2 O. Looks like Mickey Mouse. Draw a diagram of 2 water molecules attaches to each other due to its polarity.

3. What happens when water changes states of matter? Draw and label a diagram of water changing between its three states. What happens to the molecules of water as it changes states?

4. What are water’s key properties? Cohesion-water’s ability to cling to substances around it. Surface tension-water’s ability to form bubbles. –Which statement best explains the reason insects can walk across the surface of a lake? A. Water is a polar molecule, and its adhesiveness causes good capillary action. B. Water is a non-polar molecule, and its cohesiveness causes good capillary action. C. Water is a polar molecule, and its cohesiveness causes high surface tension. D. Water is a non-polar molecule, and its high adhesiveness provides high surface tension.

5. What are water’s key properties? Universal solvent—water’s ability to dissolve most substances. –What are some examples of water being a Universal Solvent? Specific heat—water’s high amount of energy need to heat or cool it. (ocean is cool on hot summer days)

6. What are water’s key properties? Buoyancy: water ability to defy gravity and allow objects to float. –An experiment is conducted, three solids are placed into a wide beaker of water. The scientist is recording where each object settles in the beaker. Which property of water is being tested? A. solubility B. cohesion C. Polarity D. buoyancy –Choose three objects, place them in order of where they would settle in the beaker of water.

7. Where on Earth is water? Draw and label a diagram of the water cycle:

8. Where on Earth is water? What percentage of water on Earth is fresh and salt? Where is the majority of freshwater located? Where is the majority of fresh surface water located?

9. How do we protect our water? What are the two types of water pollution? –State, define, and draw and image of each type of water pollution. Point-Source Non-point Source

10. How do we protect our water? What government agency is in charge of water pollution? What types of policies and rules has this agency put into place?