Review Material 3 "Material Changes"

The process of changing a solid to a liquid is called______.

• melting

• boiling

• freezing

• solidifying

Candle wax melting by a match is an example of _____________.

• freezing

• biological changes

• physical changes

• chemical changes

which of following are irreversible changes? Tick (v) 2 Boxes

• boiling an egg

• freezing ice cream

• pour viegar on baking soda

• boiling water

Which of these mixtures could you separate using filtration? Mark them with tick (V)

• paper clips and water

• sand and water

• instant coffe granules in water

• sugar and water

The factors affecting rate of dissolving, except?

• Temperature

• Surface area

• warmth

• Stirring

Which of the following substances is a mixture?

• sugar

• oxygen gas

• air

• water

Two part of solutions are ______

• Liquid and metal

• Solute and solvent

• Metal and solvent

• Solute and metal

Raw egg to fried egg is an example of _____________.

• chemical changes

• physical changes

• freezing

• biological changes

Which of the following substances is a pure subtances?

• water

• sea water

• air

• a sachet of milk

Leroy has a beaker containing salt and sand. He wants to separate the salt from the sand.

how to separated sand and water?

• sorting

• mixing

• magnetic separation

• shieving