Processing Water

True or False? If water is clear, colourless, and odourless, then it is safe to drink.

• True

• False

When we put water through a process to make it safe to drink, this is called water ______.

The first step of water treatment is

• using ultraviolet radiation

• putting it in a silo

• leaving it where we found it

• removing large objects

• adding chemicals

Alum is

• a chemical that makes water taste better.

• another name for water.

• a chemical that attracts most liquid waste in water.

• a chemical that attracts most solid waste in water.

Floc are

• groups of sheep

• sticky clumps formed by alum, sand, and other solid wastes

• groups of birds

• chemicals in water

Which substances are commonly used to eliminate bacteria and microorganisms from water? HINT: there can be more than 1 answer.

• ozone

• sulfur

• methane

• chlorine

• candy

Reverse osmosis is a process by which

• viruses and microorganisms are destroyed

• water absorbs bacteria

• mechanical pressure allows only water particles to pass through

• water changes state

Ultraviolet radiation effectively

• destroys viruses and microorganisms

• mechanically filters large objects out of water

• absorbs bacteria into water

• changes the state of water

Hard water is created when water _____ calcium and magnesium from surrounding rock.

True or False? Hard water is safe to drink.

• True

• False