fluids

Question 1

Changes of State

Answer 1

Changing from one state of matter to another. Physical changes because no new chemicals are made.
Turning from a solid to a liquid- occurs at melting point

Question 2

Melting

Answer 2

Turning from a solid to a liquid- occurs at melting point

Question 3

Freezing

Answer 3

Turning from a liquid to a solid- occurs at freezing point

Question 4

Condensing

Answer 4

Turning from a gas into a liquid.

Question 5

Sublimation

Answer 5

Turning from a solid to a gas.

Question 6

Evaporation

Answer 6

Turning from a liquid into a gas. Can occur at the surface of a liquid at any temperature.

Question 7

Boiling

Answer 7

When evaporation occurs within a liquid- occurs at the boiling point

Question 8

Pure

Answer 8

A substance made up of a single type of atom or compound.

Question 9

Pure Substances Changing State

Answer 9

Occurs at a set temperature.
The temperature stays constant when changing state as bonds are broken or made.

Question 10

Mixtures Changing State

Answer 10

Occurs over a range of temperatures as it contains substances with different melting/boiling points.

Question 11

Water

Answer 11

Contracts as it is cooled up until 4oc and then it expands slightly. Ice takes up more space than water and is less dense