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Atmospheric pressure test with answers for grade 7 science (free PDF download)

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Quick answer: Air is a mixture of gases, mainly 78 % nitrogen and 21 % oxygen, and it has mass: about 1.2 kg per cubic metre. This grade 7 science test on atmospheric pressure has 8 questions worth 20 marks, to do in 45 minutes: composition of air, evidence for mass and air in a hall. The mark scheme is on a separate page; free printable PDF.

Atmospheric pressure test with answers for grade 7 science (free PDF download)

This test covers the composition of air, the mass of air, atmospheric pressure and barometers. Use a calculator, show your working and give units. Where a question asks for an explanation, use full sentences. Marks are shown beside each part.

Level: Grade 7 science (Year 8 · Class 7) · Curriculum: MS-ESS2-5

Time: 45 minutes · 8 questions · Total: 20 marks · Calculator allowed

Question 1 Composition of air (3 marks)

  1. Name the most abundant gas in air. (1 mark)
  2. State the approximate percentage of oxygen in air. (1 mark)
  3. Name one other gas found in air in a small amount. (1 mark)

Question 2 Evidence for mass (2 marks)

A football is weighed flat and then inflated. Describe what is measured and what it shows about air.

Question 3 Air in a hall (3 marks)

A hall is 5.0 m long, 4.0 m wide and 2.5 m high. The density of air is 1.2 kg/m³.
  1. Calculate the volume of the hall. (1 mark)
  2. Calculate the mass of air in the hall. (2 marks)

Question 4 Pressure calculation (3 marks)

A force of 480 N acts evenly on an area of 0.40 m².
  1. Calculate the pressure in pascals. (2 marks)
  2. Convert the pressure into kilopascals. (1 mark)

Question 5 Reading a barometer (3 marks)

The figure shows a mercury barometer.

A mercury barometer: a tube closed at the top and sealed with a vacuum above a column of mercury, standing in a dish; air pressure pushes down on the mercury in the dish and holds the column up; the height of the column is markedvacuum (no air)mercurydish of mercuryair pressureair pressureh = 752 mm
A mercury barometer.
  1. State the height of the mercury column. (1 mark)
  2. State what is in the space above the mercury. (1 mark)
  3. State what holds the mercury up in the tube. (1 mark)

Question 6 Pressure on a mountain (3 marks)

  1. Explain why atmospheric pressure is lower at the top of a mountain than at sea level. (2 marks)
  2. State what happens to the height of the mercury column in a barometer carried up the mountain. (1 mark)

Question 7 Converting pressure (2 marks)

A weather report gives a pressure of 1020 hPa. Convert this into pascals and kilopascals.

Question 8 Unit of pressure (1 mark)

State what one pascal is equal to, in terms of force and area.

See the atmospheric pressure test answers and mark scheme

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