Hydrosphere Review

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 H2O.
• 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 waters key properties?

• Cohesion-waters ability to cling to substances
  around it.
• Surface tension-waters 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 waters key properties?

• Universal solventwaters ability to dissolve
  most substances.
• What are some examples of water being a Universal
  Solvent?
• Specific heatwaters high amount of energy need
  to heat or cool it. (ocean is cool on hot summer
  days)

6
What are waters 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?