Water Quality and Pollution

True or False: A substance with a pH of 9 is considered basic.

• True

• False

What is pH?

• The property of containing salt

• The measure of the amount of oxygen that is dissolved in water

• The amount of suspended solids in water

• The measurement of the acidity or basicity of water

Which glass contains water with high turbidity?

• Glass 1

• Glass 2

Tags

NGSS.MS-PS1-2

A body of water showed a high turbidity level, high levels of nitrates and phosphates, a pH of 7.5, and low dissolved oxygen levels. Would this body of water be considered healthy?

• Yes

• No

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the healthiest combination listed?

• low pH, high nitrates, neutral temperature
• low temperature, neutral pH and low nitrates
• as many nitrates as possible, low temp and low pH
• high temp, high nitrates and high pH

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A measure of warm or cold a body of water is. Cool water is better for organisms.

• temperature

• dissolved oxygen

• turbidity

• nitrates & phosphates

• bioindicators

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

A measure of how cloudy the water is. Water that is healthy for organisms is generally clear.

• pH

• dissolved oxygen

• turbidity

• nitrates & phosphates

• bioindicators

A measure of the amount of oxygen in the water that is available for organisms to use. Healthy water has a lot of this!

• pH

• dissolved oxygen

• turbidity

• nitrates & phosphates

• bioindicators

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

An overload of nutrients can cause overgrowth of algae and other problems in a lake or pond.

• pH

• salinity

• turbidity

• nitrates & phosphates

• bioindicators

Tags

NGSS.MS-ESS3-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Why are too many nutrients (like nitrates and phosphates) bad for our waters?

• Nutrients decrease the pH of the water, causing it to become increasingly acidic

• Nutrients change the salinity of the water

• Wetlands filter out runoff that may contain nutrients

• Nutrients in the water cause too much algae growth, which decrease the level of oxygen in the water

Tags

NGSS.MS-LS2-4