Science - Change in Matter Part 1

When a solid turns into a liquid, we call this _______point.

• boiling

• melting

• evaporating

• freezing

When a gas turns into liquid, we call this ______ point.

• freezing

• condensation

• melting

• evaporating

What happens to the speed of particles when liquid is cooled?

• The particles start to move faster.

• The particles start to move slower

What happens to the volume juice when placed in the freezer?

• The volume stays the same.

• The volume changes and increases.

• The volume changes and decreases.

What is a solution made out of?

• liquid and rocks

• solute and solvent

• sand and water

A mixture is:

• a combination of two or more substances in which each substance maintains (keeps) its physical properties.

• a combination of two or more substances in which a substance is dissolved in liquid.

A substance is soluble if it dissolves in a solvent and can be measured by how much it dissolves.

• True

• False

Name the different ways of separating mixtures:

How can I separate a mixture of iron filings, sand, marbles and salt from each other?

• attract the iron fillings from the mixture by using a magnet, then filter out the marbles by using a sieve, add water to the sand and salt and filter out the sand by using filter and funnel then evaporate the water leaving the salt at the bottom.

• filter the mixture using a sieve, then add water and evaporate the water to get the salt.

• pick out the marbles by hand and filter the rest.

If a chocolate bar melts, will its mass change?

• Yes

• No