Yr 7 2024 Chemistry Checkpoint Quiz

Identify which image shows the particle model of a gas.

• A

• B

• C

Identify which image shows freezing.

• A

• B

• C

• D

The heating curve for gold shows the change in temperature over time as gold is heated.  From the graph, identify the melting point of gold in degrees Celsius.

• -500

• 0

• 1000

• 3000

Mixtures can be made up of two or more pure substances that can be __________ separated.

• chemically

• physically

• magnetically

• electrically

Density is how much _____ is packed into a _____

• mass, volume

• volume, mass

• matter, volume

• volume, pressure

A substance has no fixed shape if it is a...

• gas

• solid or liquid

• liquid or gas

• solid or gas

Identify which of the following is NOT a pure substance:

• gold

• helium gas

• diamond

• concrete

Identify which of the following is NOT a mixture:

• air

• salt

• blood

• orange juice

Identify which of the following is an example of a mixture of gas and liquid:

• lemonade

• smoke

• muddy water

• steam

Identify the order of energy of particles from lowest to highest.

• solid, liquid, gas

• gas, liquid, solid

• liquid, solid, gas