Solids, liquids and gases

Worked examples (9)

• 1Match the unit to the quantity (Getting started)
• 2Convert an area (Getting started)
• 3Convert a volume (Getting started)
• 4Convert a density (Building confidence)
• 5Celsius and kelvin (Building confidence)
• 6Check a relationship using units (Building confidence)
• 7Spot the implausible value (Stretch)
• 8Mixed conversions before a calculation (Stretch)
• 9Two forms of the pressure unit (Stretch)

Model answers (9)

• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style

Worked examples (9)

• 1Direct substitution (Getting started)
• 2Rearrange for the mass (Getting started)
• 3Volume from dimensions first (Getting started)
• 4Float or sink (Building confidence)
• 5The displacement practical (Building confidence)
• 6Density of a liquid (Building confidence)
• 7Why a steel ship floats (Stretch)
• 8Effect of experimental errors (Stretch)
• 9Combined materials (Stretch)

Model answers (9)

• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style

Worked examples (9)

• 1Direct substitution (Getting started)
• 2Convert the area first (Getting started)
• 3Weight first, then pressure (Getting started)
• 4The drawing pin (Building confidence)
• 5Count all the legs (Building confidence)
• 6Which face gives the greatest pressure (Building confidence)
• 7Find the area needed (Stretch)
• 8Skis and snowshoes (Stretch)
• 9Work back to a mass (Stretch)

Model answers (9)

• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style

Worked examples (9)

• 1Pressure in all directions (Getting started)
• 2The can with holes (Getting started)
• 3How a gas exerts pressure (Getting started)
• 4Compressing a gas (Building confidence)
• 5Heating a gas at constant volume (Building confidence)
• 6Force versus pressure on different walls (Building confidence)
• 7Why a tyre's pressure rises on a journey (Stretch)
• 8Correcting a flawed explanation (Stretch)
• 9Why fluids differ from solids (Stretch)

Model answers (9)

• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style

Worked examples (9)

• 1Direct substitution (Getting started)
• 2Check the units (Getting started)
• 3Total pressure on a diver (Getting started)
• 4Does the container's shape matter? (Building confidence)
• 5Find the depth (Building confidence)
• 6Difference between two depths (Building confidence)
• 7Why dam walls are thicker at the base (Stretch)
• 8Work back from a total pressure (Stretch)
• 9Identify a liquid from its pressure (Stretch)

Model answers (9)

• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style

Worked examples (9)

• 1Convert both ways (Getting started)
• 2State and explain absolute zero (Getting started)
• 3Change versus value (Getting started)
• 4The extrapolation experiment (Building confidence)
• 5Why heating speeds molecules up (Building confidence)
• 6Why gas laws need kelvin (Building confidence)
• 7Cooling towards absolute zero (Stretch)
• 8Correct the statements (Stretch)
• 9Why different gases give the same answer (Stretch)

Model answers (9)

• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style

Worked examples (9)

• 1Constant temperature calculation (Getting started)
• 2Constant volume calculation (Getting started)
• 3Temperature and kinetic energy (Getting started)
• 4Why compression raises pressure (Building confidence)
• 5Why heating raises pressure (Building confidence)
• 6The shapes of the graphs (Building confidence)
• 7A bubble rising in a lake (Stretch)
• 8Find the temperature (Stretch)
• 9Which law applies? (Stretch)

Model answers (9)

• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style
• ✓Model answer — 4SD0/1P style