Science - Ch. 7 - Water

Plants use water to...

• release as a waste product.

• keep predators away.

• make their own food.

• attract pollinators.

What causes cold, deep currents to form in the oceans near the poles?

• sinking of dense, cold water with high salinity.

• the Coriolis force.

• movement of a large mass of warm water across the Pacific.

• sinking of cold freshwater from melting icebergs.

As a wave nears shore, the wave height increases and the wavelength...

• decreases.

• increases.

• stays the same.

• doubles.

Approximately what percentage of Earth's water is fresh water?

• 97%

• 71%

• 30%

• 3%

A large stream of moving water that flows through the ocean is called a(n)...

• current.

• tsunami.

• tide.

• undertow

The water in ponds and lakes is...

• moving.

• deep.

• still.

• salty.

Clay is highly porous. However, clay does not allow water to permeate very easily. Why?

• Clay contains very few pores

• Clay contains many pores.

• The pores in clay are very large.

• The pores in clay are very small.

Water that falls to Earth as rain, snow, sleet, or hail is called...

• condensation

• evaporation

• precipitation.

• transpiration.

A deep canyon in the ocean floor is called a(n)...

• abyssal plain.

• seamount.

• trench.

• continental shelf.

What is the most abundant salt in sea water?

• sodium chloride

• magnesium chloride

• calcium chloride

• potassium chloride