Water Planet Review (Unit 2)

The greenhouse effect is a process that:

• increases the Earth's temperature by trapping heat in the atmosphere.

• decreases the Earth's temperature by reflecting sunlight back into space.

• has no impact on the Earth's temperature.

• is caused by the depletion of the ozone layer.

If there were NO greenhouse effect, what would happen to the Earth’s water and organisms?

• The Earth would become extremely hot, and water would evaporate.

• The Earth would become extremely cold, and water would freeze.

• There would be no change in the Earth's temperature or water state.

• Organisms would thrive due to stable temperatures.

Why is most of Earth’s freshwater not available for people to use?

• It is frozen in glaciers and ice caps.

• It is too salty to use.

• It is polluted and unsafe.

• It is located too deep underground.

Identify what happens at each of the following states: a. Freezing point: ________ b. Melting point: ________ c. Boiling point: ________

• Freezing point: The temperature at which a liquid turns into a solid. Melting point: The temperature at which a solid turns into a liquid. Boiling point: The temperature at which a liquid turns into a gas.

• Freezing point: The temperature at which a solid turns into a liquid. Melting point: The temperature at which a liquid turns into a solid. Boiling point: The temperature at which a gas turns into a liquid.

• Freezing point: The temperature at which a liquid turns into a gas. Melting point: The temperature at which a gas turns into a liquid. Boiling point: The temperature at which a solid turns into a liquid.

• Freezing point: The temperature at which a gas turns into a solid. Melting point: The temperature at which a solid turns into a gas. Boiling point: The temperature at which a liquid turns into a solid.

Determine the state (solid/liquid/gas) the water is changing to AND the process that is occurring (evaporation, condensation, melting, freezing) for the following scenarios: a. Liquid has heat removed b. Liquid has heat added c. Water vapor cools d. Ice has heat added

• a. State: Solid, Process: Freezing; b. State: Gas, Process: Evaporation; c. State: Liquid, Process: Condensation; d. State: Liquid, Process: Melting.

• a. State: Gas, Process: Condensation; b. State: Solid, Process: Freezing; c. State: Liquid, Process: Melting; d. State: Gas, Process: Evaporation.

• a. State: Liquid, Process: Melting; b. State: Solid, Process: Freezing; c. State: Gas, Process: Evaporation; d. State: Liquid, Process: Condensation.

• a. State: Gas, Process: Evaporation; b. State: Liquid, Process: Condensation; c. State: Solid, Process: Freezing; d. State: Gas, Process: Melting.

Directions: Complete the following questions to prepare for the unit test. Understand the difference in what occurs to molecules in a solid and a gas. How closely are they packed? What speed do they move?

• Molecules in a solid are closely packed and move slowly, while molecules in a gas are far apart and move quickly.

• Molecules in a solid are far apart and move quickly, while molecules in a gas are closely packed and move slowly.

• Molecules in a solid and gas are both closely packed and move slowly.

• Molecules in a solid and gas are both far apart and move quickly.

These are clouds that form at or above 18000 feet.

• cirrus

• cumulus

• stratus

• nimbus

Another name for a stratus cloud that is on ground-level is called ___fog___.

• fog

• mist

• haze

• smog

The amount of water on Earth has changed over billions of years.

• It has increased significantly.

• It has decreased significantly.

• It has remained relatively constant.

• It has fluctuated wildly.

The major source of energy that powers the water cycle is:

• wind

• sun

• moon

• geothermal heat