Gases in the atmosphere
I am able to name the main gases in the atmosphere and describe the test and some uses for each one.
Gases in the atmosphere
I am able to name the main gases in the atmosphere and describe the test and some uses for each one.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- About 79% of the atmosphere is nitrogen gas that is very unreactive.
- Nitrogen gas is often used to fill food packaging to provide an unreactive atmosphere.
- About 20% of the atmosphere is oxygen.
- The test for oxygen gas is that it relights a glowing splint.
- The test for carbon dioxide gas is that it forms a white precipitate that turns limewater milky.
Keywords
Atmosphere - The atmosphere is a layer of gas that surrounds a planet. It may contain small amounts of solid and liquid particles.
Mixture - A mixture is a material that contains two or more different substances, which can be physically separated.
Respiration - Respiration is a chemical process that uses oxygen from the air, and glucose to provide energy for life processes.
Precipitate - A precipitate is an insoluble solid formed when two solutions react together.
Common misconception
The atmosphere is mostly oxygen.
Explain that the atmosphere is ~79% nitrogen and ~20% oxygen.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
contains different substances, which can be physically separated
made from only one type of atom
contains different elements chemically joined together