Properties and Changes of Materials

Thermal insulators…

• do not allow heat to pass through easily.

• allow heat to pass through easily.

• keep heat contained but don't keep things warm.

• do not keep heat contained and allow things to cool.

An example of an electrical conductor is….

• copper
• plastic
• wood
• rubber

If a material is translucent it:

• will catch fire and burn

• will be attracted to magnets

• dissolves so you can no longer see it

• lets some light pass through it

____________are materials that keep their shape unless force is applied to them. They can be hard, soft or squishy.

Which of these changes of state happen because of an increase of heat:

• water becoming a solid

• water becoming a gas

• wax melting

• a gas becoming a liquid

Materials that dissolve are:

• insoluble
• soluble
• a solution
• a solvent

When solid particles dissolve in a liquid, this is called a:

• mixture

• evaporation

• solution

• substance

Which two of these substances will dissolve in water?

• salt

• flour

• sugar

• pepper

What could you do to make a material dissolve faster?

• Stir it

• Raise the temperature of the liquid

• Add more of the material

• Make the particle size bigger

What is the scientific name for turning water vapour into water?

• evaporation
• melting
• freezing
• condensation