change of state

When a liquid boils to form a gas, which two of the options apply?

• The molecules lose kinetic energy and slow down

• The molecules move closer together

• The molecules gain kinetic energy and speed up

• The molecules move further apart

Which terms below describe "vaporising".

• Boiling

• Evaporating

• Condensing

• Fusing

When a solid melts to form a liquid, which of the options apply?

• The molecules gain kinetic energy and vibrate more quickly.

• The molecules start to change their position relative to the other molecules

• The molecules gain kinetic energy and speed up

• The molecules move much further apart.

When a gas condenses to form a liquid, which two of the options apply?

• The molecules lose kinetic energy and slow down

• The molecules move closer together

• The molecules gain kinetic energy and speed up

• The molecules move further apart

Latent heat is given out when water boils.

• True

• False

Where do we read the level of liquid?

• The highest point the liquid touches
• The bottom of the meniscus
• Half way between, we make an educated guess and round it
• Somewhere about there

Which of the following statements best describes the First Law of Thermodynamics?

• Whenever there is an opportunity for energy dispersal, energy spreads out.

• Thermal energy transfers from a warm object to a cold object.

• The addition of thermal energy increases the entropy of a substance.

• The change in thermal energy of an object is equal to the heat added to the object minus the work done by the object.

Between which two points is iron a solid?

• A to B

• B to C

• C to D

• D to E

• E to F

If a balloon is cooled what will happen to the volume?

• Volume will increase
• Volume will decrease
• Volume will not change

___________ is the average speed of the particles in a given sample of matter.

• temperature

• energy

• melting

• speed