Gr. 9 Environmental Chemistry Review

Acids have a pH...

• 7 and lower

• lower than 7

• Exactly 7

• Greater than 7

The nitrogen in the atmosphere is in the form of:

• NO3

• N2

• NO4-

• N3

Organic compounds:

• Contain carbon

• Do not contain carbon

Tags

NGSS.HS-LS1-6

NGSS.HS-LS2-5

If a blue litmus paper is placed in an acid, the paper will turn:

• blue

• red

• purple

True or False. The acidity of a substance is based on the concentration of carbon atoms that it has.

• True

• False

How much more basic is a solution that is 5 pH than 3 pH?

• 2

• 10

• 100

• 1000

The approximate pH of stomach acid is...

• 4

• 6

• 1.5

• 10

One of the main purposes of carbohydrates is to:

• Energy storage

• Building blocks of cells

• Carry genetic information

• Provide energy and help with cellular structure

Tags

NGSS.MS-LS2-3

When molecules move from an area of higher concentration to lower concentration this is called:

• Diffusion

• Osmosis

• Active transport

• Cellular respiration

CO₂ is also known as...

• carbon dioxide

• carbon monoxide

• carbon footprint