Water Quality and Salinity Warmup

Which biological factor is important for predicting the potability of water supplies?

• Soil texture

• Bio-indicators

• Sunlight exposure

• Air quality

How do bacteria affect Dissolved Oxygen (DO) in water bodies?

• increase DO through decomposition

• DO stays the same

• decrease DO through decomposition

• bacteria multiply DO by 8

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What can add dissolved oxygen to the water?

• Photosynthesis

• Diffusion from the air above

• Wave and Wind Action

• All of the above

Tags

NGSS.MS-LS1-6

A measure of the amount of salt dissolved in a body of water.

• pH

• salinity

• turbidity

• nitrates & phosphates

• bioindicators

High levels of nitrates and phosphates in water can indicate what?

• Potential for eutrophication

• High water clarity

• Low pollution

• Decreased water temperature

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which glass contains water with high turbidity?

• Glass 1

• Glass 2

Why are bio-indicators used to assess water quality?

• To measure temperature

• To indicate the presence of pollutants

• To increase pH levels

• To decrease turbidity

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-LS2-3

NGSS.MS-LS2-4

What does a high turbidity level indicate about water?

• Lower pollution

• Less clarity

• Higher potability

• More dissolved oxygen

What is the primary factor that affects the salinity of ocean water?

• Evaporation

• Rainfall

• Wind speed

• Sunlight

Tags

NGSS.MS-ESS2-4