Grade 8 Water

Aluminum Sulfate has a positive charge

• True

• False

About how much of the earth's water is freshwater?

• 5%

• 12%

• 3%

• 1%

Dirt and debris found in water usually has a positive charge

• True

• False

About how much of the earth's freshwater is stored in glaciers?

• 34%

• 7%

• 22%

• 68%

The first step of Water Purification process is filtration

• True

• False

What is a floc?

• Fine sand that the water filters through to remove debris

• A chemical added to water to start coagulation

• A mass formed when the debris is the water coagulates

• A special pipe that the water flows through when exposed to UV light

About how much water do Canadians use each day?

• 145 litres

• 329 litres

• 45 litres

• 1000 litres

What is coagulation?

• When the particles stick together to form larger particles

• The final step of the Water Treatment process

• When the water is filtered to remove debris

• The process of collecting water from a natural water source

What is sedimentation?

• When the water is disinfected so it can be consumed

• When gravity causes the coagulated flocs to sink to the bottom of the water treatment basin so they can be easily removed

• The first step of the water treatment process

• A type of rock

What type of disinfectant do we use in our water in Hamilton, Ontario?

• UV light

• Chlorine

• Allum

• Aluminum Sulfate