Exploring the Unique Properties of Water

What percentage of Earth's surface is covered by water?

• 60%

• 80%

• 50%

• 70%

Why is water considered a universal solvent?

• It cannot dissolve any substances.

• It can dissolve only organic substances.

• It can dissolve a wide variety of substances.

• It can dissolve only inorganic substances.

What property of water allows insects to walk on its surface?

• High specific heat

• Solvent capability

• Polarity

• Surface tension

How does water's high specific heat benefit Earth?

• It helps moderate the planet's temperature.

• It makes water a good solvent.

• It allows water to evaporate quickly.

• It helps in the formation of ice.

What is the panspermia theory?

• Life originated from deep ocean trenches.

• Life can only exist on Earth.

• Life can be spread via comets or space ice.

• Life originated from volcanic vents.

What is the significance of water's slight blue tinge?

• It absorbs more red light.

• It reflects all light equally.

• It absorbs less blue light.

• It absorbs more blue light.

Which molecule is considered a potential substitute for water in supporting life?

• Oxygen

• Ammonia

• Carbon dioxide

• Nitrogen

On which moon of Saturn is methane found in liquid form?

• Titan

• Europa

• Callisto

• Ganymede

What effect would life on Titan have on its atmosphere?

• Decrease in methane levels

• Increase in nitrogen levels

• Decrease in hydrogen levels

• Increase in oxygen levels

Why is NASA focused on finding water on other planets?

• Water is necessary for all known life forms.

• Water is abundant in the universe.

• Water is the only indicator of life.

• Water can be used as fuel.