Unit 4: Test Review

Which atom in a water molecule has a partial negative charge?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon

Water molecules sticking to each other is called:

• Adhesion

• Cohesion

• Surface tension

• Capillary action

Which property allows insects like water striders to “walk” on water?

• Adhesion

• Cohesion

• Surface tension

• Specific heat

Which property allows water to move upward in plant stems (xylem)?

• Capillary action

• Surface tension

• Freezing expansion

• Solubility

Why is water less dense as a solid?

• Molecules move faster

• Molecules spread apart when frozen

• Hydrogen bonds break

• Surface tension weakens

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Why is water’s high specific heat important for climate?

• It resists temperature change, moderating climate

• It evaporates quickly

• It absorbs salt

• It reduces greenhouse gases

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Which heats up faster: land or water?

• Land

• Water

• Both equal

• Neither

Why does coastal NC have cooler summers than inland NC?

• More trees inland

• Water moderates temperature due to high specific heat

• Clouds block heat inland

• Less air pressure inland

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What drives deep ocean currents?

• Temperature and salinity differences

• Wind

• Tides

• Earthquakes

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Surface currents are driven mostly by:

• Density

• Wind and Earth’s rotation

• Volcanoes

• Earthquakes

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