Properties and Changes of Materials

Tina investigates how quickly water evaporates

she does her experiment three times.

what variable is Tina changing in this investigation?

• the size of the beakers

• the material the beakers are made from

• the temperature of the water

• the time she leaves the beakers for

Look at the diagrams below. which shows a change that is reversile?

• A

• B

• C

• D

Mr Glen stirs different substances into four beakers.

which beaker contains a solution?

• A ( sand and water)

• B ( oil and water)

• C (salt and water)

• D (oats and water)

what will happen if a beaker of sugary water is placed in sunlight for a week?

• all the mixture will evaporate

• the sugar will stop the water evaporating

• only the sugar will evaporate

• only the water will evaporate

Tony observes an object adn writes down some of its properties

The object is most likely to be made from...

• A. paper

• B. rubber

• C. plastic

• D. glass

The table below shows the properites of four materials.

which material should be used to make a cheap pan to heat soup in?

• A. copper

• B. plastic

• C. limestone

• D. steel

Which cannot be separated using a sieve?

• A. rice and water

• B. meatballs and sauce

• C. juice and fruit

• D. oil and milk

Mrs. Helen has four spoons made of different materials.

She pours hot water into four cups and stirs each cup with a different spoon.

which material is most likely to be the first to feel hot?

• rubber

• wood

• metal

• plastic

Laila lights a cnadle. As it burns, the wick turns black and the candle wax melts.

Laila blows the candle out. After some time, the wax becomes a solid again. The wick stays the same. This is because...

• burning candle wick is not a reversile change

• solids cannot change back into liquids

• it is not possinle to make the wick cold enough agian.

• the wick needs to be dissolved in a liquid

Christina stirs a teaspoon of salt into hot water. The salt dissolves in the water. Christina plans an experiment to separate the salt from the water again.Which method should she use?

• separating with a magnet

• evaporating

• filtering

• sieving