LO6- What Are Things Made Of - mixtures,solutions and separation

Which word do we use to refer to a substance that dissolves in water?

• Soluble

• insoluble

• solvable

• unsolvable

Which of these materials are soluble in water?

• Salt, sugar, honey

• Sand, rock, wood

• Salt, rock, glass

• Oil, glass, plastic

Which of these materials is insoluble in water?

• Sugar

• Sand

• Coffee

• Salt

Which is the best way to get salt from salty water?

• Evaporation

• Distillation

• Filtration

• It cannot be done

When a soluble substance such as sugar dissolves in a liquid, it has disappeared.

True or False?

• True

• False

If I have 3 glasses of water 1= almost empty, 2= half full, 3= full.

I put a teaspoon of salt in each glass which glass will the salt dissolve the least?

• The almost empty glass

• The half filled glass

• The full glass

What is the correct order for obtaining salt from a mixture of sand and salt?

• Dissolving in water - filtration - evaporation

• Evaporation - filtration - dissolving in water

• Filtration - dissolving in water – evaporation

• Filtration – evaporation – dissolving in water

How could you separate iron filings from a mixture of iron and sand?

• Using a magnet

• By adding water and filtering

• By distillation

• By evaporation

Materials can only dissolve in water.

True or False

• True

• False

If I mix salt with water and then heat it up, what will happen?

• The salt will not dissolve

• The salt will dissolve slower

• The salt will fall to the bottom of the glass

• The salt will dissolve faster