Importance of water

Multiple Choice

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

Multiple Choice

When a molecule has an opposite electrical charge on each end, it is known as what?

• cohesion
• polar molecule
• hydrogen bond
• solution

Multiple Choice

How much of Earth's water is salt water?

• 50%
• 66%
• 75%
• 97%

Multiple Choice

How much of Earth's water is available to drink?

• 2%

• 12%

• 1%

• 97%

Multiple Choice

The ability of water molecules to stick to each other, creating surface tension is called:

• Cohesion

• Adhesion

• Insulation

• Ph

Multiple Choice

The fact that water can stick to other substances is called:

• Ph

• Adhesion

• Cohesion

• Insulation

Multiple Choice

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Multiple Choice

When water molecules stick easily to other water molecules, this is called what?

• cohesion
• adhesion
• solution
• polar molecule

Multiple Choice

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

• Water is an acid.
• Water is a versatile solvent.
• Water has a high heat capacity.
•  Water acts as a buffer.

Multiple Choice

Why does ice float?

• As water freezes, it expands and its density decreases.
• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Multiple Choice

The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form

• less polar
• more polar
• less dense
• more dense

Multiple Choice

This molecule structure is

• Ice

• Water

• Vaporized water

Multiple Choice

This molecule structure is

• Ice

• Water

• Vaporized water

Multiple Choice

This molecule structure is

• Ice

• Water

• Vaporized water

Multiple Choice

Colder water rises

• True

• False

Multiple Choice

Warmer water is less dense than cold water

• True

• False

Multiple Choice

Currents are essential to life in the ocean

• True

• false