Ch.11,12,13

The feature of the ocean floor where old crust sinks back to the mantle.

• seamount
• abyssal plain
• trench
• mid-ocean ridge

Percentage of freshwater on Earth.

• 1%
• 3%
• 5%
• 97%

Water that fills the cracks and spaces in underground soil is called ________.

• groundwater
• infiltration
• sublimation
• transpiration

Deep currents in the ocean are caused by differences in _____________.

• altitude
• temperature
• salinity
• none of these

Step in the water cycle that forms clouds.

• transpiration
• evaporation
• precipitation
• condensation

As depth in the ocean increases, pressure...

• decreases
• remains the same 
• levels off
• increases

Occurs when ice changes directly to water vapor, such as dry ice.

• sublimation
• infiltration
• transpiration
• density

Instrument used to find air pressure.

• thermometer
• anemometer
• barometer
• all of these

As altitude increases, air pressure ______.

• descreases
• increases
• levels off
• never changes

The atmospheric layer where weather occurs.

• troposphere
• stratosphere
• mesosphere
• thermosphere