Tides, Waves and Current

Where is most of the Earth’s freshwater located?

• in lakes
• in rivers
• in oceans
• in glaciers

What percent of the earth is covered by water?

• 20%
• 50%
• 70%
• 85%

Water on Earth is either freshwater or saltwater. What is the percent ratio of freshwater to percent saltwater on Earth?

• 1% freshwater : 99% saltwater
• 3% freshwater : 97% saltwater
• 30% freshwater : 70% saltwater
• 50% freshwater : 50% saltwater

Rain, hail, sleet and snow are all examples of

• deposition
• frozen water
• precipitation
• tornado warning signs

Which sequence lists the water cycle in order?

• condensation, evaporation, runoff/storage, precipitation
• evaporation, condensation, precipitation, runoff/storage
• condensation, precipitation, evaporation, runoff/storage
• condensation, runoff/storage, precipitation, evaporation

The Gulf Stream current shown here makes the waters of the North Atlantic

• warmer
• cooler
• more dense
• less nutrient rich

As a wave moves towards the shore into shallower water, the wave length _____________ and its height _____________.

• decreases, increases
• increases, decreases
• remains the same, decreases
• remains the same, increases

What is the MOST important factor affecting the movement of water in an ocean?

• currents 
• molecules
• tides
• waves

When the Moon, Earth, and Sun are lined up as seen here, the gravity of the sun plus the gravity of the moon cause _________ tides on Earth.

• low
• neap
• slow
• spring

Tides are caused by

• gravity
• heat
• waves
• winds