Water Quality Ted Talk (Mod)

What percentage of people globally cannot be sure their water is safe to drink?

• 75%

• 10%

• 25%

• 50%

What is the first step in the water treatment process?

• Boiling

• Sedimentation

• Disinfection

• Filtration

Which chemical is primarily used to disinfect water?

• Hydrogen

• Chlorine

• Nitrogen

• Oxygen

What can excessive chlorine in water lead to?

• Pipe corrosion

• Decreased bacteria

• Increased clarity

• Improved taste

Tags

NGSS.HS-PS1-5

Why is it difficult to assess the risks of chemically contaminated water?

• Complex chemical interactions

• Lack of technology

• Water is too clear

• Chemicals are invisible

What is a sign that water might be unsafe to drink?

• It has a foul odor

• It tastes sweet

• It is cold

• It is colorless

What ancient civilization used the sun's heat to purify water?

• Mayans

• Egyptians

• Romans

• Greeks

What is a modern method of point-of-use water treatment?

• Sedimentation

• Adsorption filtration

• Sun exposure

• Boiling

How many people globally lack regular access to clean water?

• More than 1 billion

• Less than 300 million

• About 500 million

• Nearly 800 million

Tags

NGSS.MS-ESS2-4

What is essential for fulfilling one of the most basic human needs?

• Clean water access

• Technological advancements

• Economic stability

• Global peace

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1