Year 7 Matter Review

Identify the changed variable below

• Heat source

• Type of saucepan used

• Amount of water heated

• Type of thermometer used

• Time taken to heat the water

Identify the measured variable below

• Heat source

• Type of saucepan used

• Amount of water heated

• Type of thermometer used

• Time taken to heat the water

Identify which variables below were kept the same

• Heat source

• Type of saucepan used

• Amount of water heated

• Type of thermometer used

• Time taken to heat the water

How could Alex improve the reliability of her results?

• Get a new saucepans for the investigation

• Use a Bunsen burner instead of the stove

• Repeat the investigation using 1 L water

• Carry out five trails under the same conditions

At school, Alex investigated the heating of water using the apparatus in the diagram.

identify the piece of equipment labeled A

• Tripod

• Beaker

• Bunsen burner

At school, Alex investigated the heating of water using the apparatus in the diagram.

identify the piece of equipment labeled B

• Tripod

• Beaker

• Bunsen burner

At school, Alex investigated the heating of water using the apparatus in the diagram.

identify the piece of equipment labeled C

• Tripod

• Beaker

• Bunsen burner

At school, Alex investigated the heating of water using the apparatus in the diagram.

Alex found that she could not heat the water above 100°C. The best explanation is that, at 100°C water particles

• react chemically

• take up less space

• turn into different particles

• absorb enough energy to escape as a gas

What quantity would a measuring cylinder measure?

• time in seconds

• change from 15^oC to 100^oC

• 500 mL water

What quantity would a stopwatch measure?

• time in seconds

• change from 15^oC to 100^oC

• 500 mL water