Water Filters and Purification Quiz

What is the main purpose of a water filter?

• To make water taste better

• To remove impurities from water

• To add minerals to water

• To change the color of water

Which of the following is NOT a method of water purification mentioned?

• Solar water disinfection

• Boiling water

• Using water purification tablets

• Adding sugar to water

What is the first step in making a water filter at home?

• Pour muddy water

• Add pebbles

• Cut the plastic drink container

• Add charcoal

What material is recommended to plug the bottle neck in a water filter?

• Cotton wool or coffee filter

• Plastic wrap

• A piece of cloth

• A sponge

What is the ideal size of pebbles to use in a water filter?

• Around 2cm in diameter

• Around 0.5cm in diameter

• Around 1cm in diameter

• Around 5cm in diameter

What is the last layer in a homemade water filter?

• Pebbles

• Charcoal

• Fine clean sand

• Cotton wool or coffee filter

How long should you boil water to purify it?

• 1 minute

• 3 minutes

• 10 minutes

• 5 minutes

What is the active ingredient commonly found in water purification tablets?

• Calcium

• Magnesium

• Sodium

• Chlorine

What is the purpose of activated charcoal in a water filter?

• To make the water colder

• To change the color of the water

• To absorb toxins

• To add flavor to the water

What is a simple method to filter water using paper towels?

• Using a siphon

• Using a sponge

• Using a funnel

• Using a straw