Water Chemistry

Why don't oil and water mix together?

• Oil is nonpolar and water is polar.

• Water is nonpolar and oil is polar.

• Both substances are polar and repel each other.

• Both substances are nonpolar and repel each other.

Tags

NGSS.MS-PS1-2

Which property of water causes water droplets to stick to your car's windshield as you drive through the rain?

• adhesion

• cohesion

• surface tension

• density

Which property of water causes water drops to stick together and make larger water drops as they slide down the windshield of your car?

• cohesion

• adhesion

• surface tension

• density

How is a steel paperclip able to float in a glass of water?

• Steel is less dense than water, so it floats.

• Steel is nonpolar, so it is repelled by water.

• Water has high surface tension, which supports the weight of the paperclip.

• Water has high density, which supports the weight of the paperclip.

What is happening to the ocean's pH as it decreases?

• The ocean is becoming more acidic.

• The ocean is becoming more basic.

• The ocean is becoming more polar.

• The ocean is becoming more turbid.

Tags

NGSS.MS-PS1-2

How can you decrease the specific heat of a water sample and make it boil faster?

• add salt

• add sand

• add acid

• add oxygen

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Which two (2) variables are required when solving for salinity?

• mass of salt and volume of water

• mass of water and volume of salt

• mass of water and volume of water

• mass of salt and volume of salt

What is the average salinity of the ocean?

• 3.5%

• 35%

• 3.5 ppt

• 0.35 ppt

Which option is an example of biogenous sediment?

• pieces of shells

• eroded rocks

• tektites

• salt crystals

Which option contains examples of terrigenous sediment?

• eroded rocks and minerals

• pieces of shells and exoskeletons

• salt crystals and dissolved metals

• meteorites and cosmic dust