Understanding Water: Properties and the Water Cycle

What is the chemical formula for water?

• H2O2

• H2O

• HO2

• O2H

Which property of water allows it to dissolve more substances than any other liquid?

• Universal solvent

• Low boiling point

• High density

• High viscosity

What causes water droplets to form a spherical shape?

• Adhesion

• Cohesion

• Evaporation

• Condensation

How does capillary action benefit plants?

• It helps in photosynthesis

• It aids in seed dispersal

• It pulls water from roots to leaves

• It prevents water loss

What type of bond holds the hydrogen and oxygen atoms together in a water molecule?

• Covalent bond

• Ionic bond

• Metallic bond

• Hydrogen bond

Why is water considered a polar molecule?

• It has a neutral pH

• It has one positive and one negative end

• It is colorless

• It is tasteless

What percentage of global evaporation occurs over the ocean?

• 50%

• 60%

• 86%

• 78%

How does ocean salinity change during the water cycle?

• It remains constant

• It decreases with evaporation

• It increases with precipitation

• It increases with evaporation

Where is the majority of Earth's fresh water stored?

• Rivers

• Lakes

• Polar ice caps and glaciers

• Underground aquifers

Why is fresh water considered one of the most precious substances on Earth?

• It is scarce and essential for life

• It is used in industry

• It is abundant

• It is easy to access