Water and Solutions

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Tags

NGSS.HS-ESS2-5

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.

Tags

NGSS.HS-ESS2-5

The attraction that causes water and other liquids to form drops is called ________________. This is also water’s ability to be attracted to other water molecules.

• adhesion
• capillary action
• cohesion
• surface tension

Tags

NGSS.HS-ESS2-5

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

A mixture of two or more substances; dissolved particles are spread evenly throughout the mixture

• solvent

• solute

• mixture

• solution

What is a the freezing point of water?

• 100 ^oC

• 100 ^oF

• 32 ^oF

• 32 ^oC

Tags

NGSS.MS-PS1-4

What is the boiling point of water?

• 32 degrees fahrenheit

• 100 degrees celsius

• 32 degrees celsius

• 100 degrees fahrenheit

The depression of the freezing point of water occurs when salt is added. Why?

• The reason that the freezing point

  lowers is because the salt melts the ice.

• The reason that the freezing point

  lowers is because more energy is needed to be removed from the water for it to freeze

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

According to the United States Geological Survey, approximately 71% of the Earth’s surface is covered by water.

• True

• False

Tags

NGSS.MS-ESS2-4

How many valence electrons does the water molecule (H₂O) have?

• 1

• 8

• 2

• 6

Tags

NGSS.MS-PS1-1