More cards in this set

Card 6

Front

What is hard water?

Back

Preview of the front of card 6

Card 7

Front

What is the difference between scale and scum

Back

Preview of the front of card 7

Card 8

Front

Water can be softened by removing the salts that produce scale and scum. How?

Back

Preview of the front of card 8

Card 9

Front

What is the difference between pure water and water that is fit to drink

Back

Preview of the front of card 9