water conservation and treatment

What is the first step in the water treatment process?

• coagulation
• filtration
• flocs
• concentation

What word means the solid particles that have settled out during the sedimentation process.

• sediment
• solubility
• settlement
• solidifying

What is the purpose of using ultraviolet light on the water?

• To bleach it out

• To "sterilize" any bacteria

• To remove chlorine

• To kill viruses

What does chlorination do to the water?

• Removes microorganisms
• Cleans the water
• Makes the water taste nice
• Removes twigs and sediment

What is the first step of preliminary wastewater treatment, which removes large items such as plastic wrappers and sticks?

• screening

• sedimentation

• aeration

• disinfection

Which human activity has the most negative impact on water quality?

• agriculture

• flushing toilets

• washing clothes

• recreational boating

Where is most of the freshwater found on Earth?

• lakes
• glaciers
• oceans
• rivers

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

Approximately what percentage of Earth's water is SALT water?

• 97 %
• 71%
• 30%
• 3%

This picture shows....

• irrigation

• aeration

• chlorination

• filtering

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-3

This is a picture of....

• aeration

• chlorination

• filtering

• irrigation