Correlation is a link between variables so that if one variable changes so does the other. It can be a negative or positive correlation.

If there are uncertainties in data, it means there may be some doubt over the reliability of the data.

An isotope is an atom of an element with the same number of protons, but different mass number, due to a different number of neutrons.

Carbon emissions are the release of carbon dioxide into the atmosphere, often through the combustion of fossil fuels.

Carbon footprint is the total amount of carbon dioxide or other greenhouse gases that a person, product, organisation or event emits in its life cycle.

Human activity

Chemistry

In the Industrial chemistry unit, pupils will learn about chemical, industrial, environmental and economic factors of some large-scale chemical processes.

In the Carbon cycle and climate change unit, pupils learnt about the formation of sedimentary rocks and fossil fuels, and the impact of burning fossil fuels within the carbon cycle.

Atmosphere and changing climate

the release of carbon dioxide into the atmosphere

the total amount of carbon dioxide that something emits in its life

a link between variables; if one variable changes so does the other

Match the key term with the correct definition.

What relationship does the graph show between the year and amount of atmospheric carbon dioxide (ppm)?

What term do we give to an atom of an element with the same number of protons, but different mass number due to a different number of neutrons?

Plastic bag A releases 1.9kg of CO₂ during manufacture.

Plastic bag B releases 1.8kg of CO₂ during manufacture.

Plastic bag C releases 1.6kg of CO₂ during manufacture.

Based on the following carbon footprint data, which plastic bag should we use to reduce the increase in global temperatures?

Which of the following technologies could be used to reduce the carbon footprint of a product?

the limited data from the great expanse of the oceans surface

the lack of historical data on carbon dioxide levels

the altitude of the weather station affects the temperature

Which of the following lead to uncertainties in the climate change data?

What word is used to describe a link between variables so that if one variable changes so does the other?

turn off electrical appliances when not in use

Which of the following are ways humans can reduce their carbon dioxide emissions?

Isotopes are atoms of an element with the same number of protons, but a different number of which subatomic particles?

The combustion of fossil fuels releases which greenhouse gas into the atmosphere?

for vehicles such as lorries, ships and aeroplanes

Which of the following are reasons why humans combust fossil fuels?

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