Y7 - Topic 1 - Solids, liquids and gases - 3

Which best explains the change from solid to liquid?

• The particles move apart

• The wax around the particles melts

• Solid particles (hard) change to liquid particles (runny)

• The particles start to move about from place to place, keeping close together

Lead must be heated to a higher temperature than wax before it melts. Which best explains why lead melts at a higher temperature?

• Lead is harder and stronger than wax.

• Lead is a better conductor of heat.

• Lead particles are closer together than wax particles.

• The attraction between lead particles is stronger.

What piece of scientific apparatus does this diagram represent?

• beaker

• tripod

• gauze

• Bunsen burner

What piece of scientific apparatus does this diagram represent?

• beaker

• tripod

• gauze

• Bunsen burner

What piece of scientific apparatus does this diagram represent?

• beaker

• tripod

• gauze

• Bunsen burner

What piece of scientific apparatus does this diagram represent?

• beaker

• tripod

• gauze

• Bunsen burner

Complete the sentence: When water vapour is left to cool, the particles lose energy and move _____________ to each other.

Complete the sentence: There is no change in temperature when a change in __________________ is occurring.

What is occurring at the point labelled "X" on the cooling curve?

• melting

• condensing

• freezing

• boiling

What is occurring at the point labelled "X" on the cooling curve?

• melting

• condensing

• freezing

• boiling