Starter quiz
- Which of the following are greenhouse gases?
- methane ✓
- water vapour ✓
- carbon dioxide ✓
- nitrogen
- sulfur dioxide
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- What key term do we use to describe the layer of gas that surrounds a planet?
- 'atmosphere' ✓
- Which of the following is a correct equation for complete combustion?
- fuel + oxygen → carbon dioxide + water ✓
- carbon dioxide + water → glucose + oxygen
- fuel + oxygen → carbon + water
- fuel + oxygen → carbon monoxide + water
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- Which of the following is the correct equation for respiration?
- carbon dioxide + water → glucose + oxygen
- fuel + oxygen → carbon monoxide + water
- glucose + oxygen → carbon dioxide + water ✓
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- Which of the following lead to increased levels of carbon dioxide in the atmosphere?
- photosynthesis
- deforestation ✓
- complete combustion of fossil fuels ✓
- carbon dioxide dissolving in the oceans
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- Order the statements to describe how carbon dioxide becomes 'locked up' in sedimentary rocks.
- 1⇔carbon dioxide in the atmosphere dissolves in the oceans
- 2⇔carbon dioxide in the oceans reacts to form carbonate compounds
- 3⇔carbonate compounds are used in animal shells and bones
- 4⇔when the animals die the shells and bones settle at the bottom of the ocean
- 5⇔over millions of years sedimentary rocks form from these sediments
Exit quiz
- The complete combustion of fossil fuels produces water and which other product?
- 'carbon dioxide' ✓
- Match the scientific key term with the correct definition
- Decomposers⇔Organisms that break down dead and decaying matter ✓
- Carbon cycle⇔This shows how carbon moves between different carbon reservoirs ✓
- Combustion⇔An exothermic reaction where a substance reacts with oxygen. ✓
- Atmosphere⇔A layer of gas that surrounds a planet. ✓
- Which of the following processes does not occur in the carbon cycle?
- photosynthesis
- respiration
- combustion
- neutralisation ✓
- decomposition
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- What effect does increased ocean temperatures have on the amount of CO₂ dissolved in the oceans?
- At higher ocean temperatures less CO₂ is dissolved in them ✓
- At higher ocean temperatures more CO₂ is dissolved in them
- Ocean temperature does not have an effect on the amount of CO₂ dissolved in them
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- Which option best describes how far molecules of carbon dioxide released into the atmosphere in London will spread?
- the carbon dioxide molecules will not travel far and will remain in London
- the carbon dioxide molecules may travel to the countryside surrounding London
- the carbon dioxide molecules travel longer distances such as to mainland Europe.
- the carbon dioxide molecules may eventually spread around the world. ✓
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- If CO₂ levels in the atmosphere are increasing, what does this tell us about the rate of addition and removal?
- The rate of addition of CO₂ is greater than the rate of removal ✓
- The rate of addition of CO₂ is the same as the rate of removal
- The rate of addition of CO₂ is less than than the rate of removal
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Burning fossil fuels adds more carbon dioxide to the atmosphere.
- Carbon dioxide produced from a combustion reaction may eventually spread throughout Earth’s atmosphere.
- Increased ocean temperatures reduce the quantity of carbon dioxide that is dissolved in them.
- The difference between the rates of addition and removal of carbon dioxide changes its overall levels in the atmosphere.
Common misconception
Plants can absorb all excess carbon dioxide.
There are limits of carbon dioxide absorption by plants.
Keywords
Carbon cycle - The carbon cycle shows how carbon moves between different carbon reservoirs including the atmosphere, oceans and land on Earth.
Atmosphere - The atmosphere is a layer of gases that surrounds a planet. It may contain small amounts of solid and liquid particles.
Combustion - Combustion is an exothermic reaction where a substance reacts with oxygen.
Decomposers - Decomposers are organisms which break down dead and decaying matter.
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