Ozone is made up of oxygen atoms. It has the molecular       formula O₃.

The ozone layer refers to an area in the stratosphere where there is a high concentration of ozone.

Ultraviolet (UV) radiation is a type of electromagnetic radiation which is emitted from the Sun.

Chlorofluorocarbons are compounds consisting of chlorine, fluorine and carbon atoms only.

Analytical scientists use a range of scientific techniques to study the chemical composition of substances.

Ozone layer: a story of global success

Chemistry

Earth's atmosphere

Evolution of Earth's atmosphere

Burning hydrocarbons

Atmospheric pollutants

Acid rain and chemical weathering

Greenhouse gases

Carbon dioxide in the atmosphere

Global climate change and the effects

Human activity and climate change

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 learned about the carbon cycle, the formation of sedimentary rocks, and the impact of burning fossil fuels.

This unit explores the composition and evolution of Earth’s atmosphere, evidence of climate change, and effects of pollutants like sulphur dioxide. It highlights scientific explanations, ethical considerations, risk evaluation, and the role of peer review in communication.

Atmosphere and changing climate

Which of the following caused a 'hole' in the ozone layer?

it absorbs higher frequency infrared radiation

it absorbs lower frequency infrared radiation

it absorbs shorter wavelength ultraviolet radiation

it absorbs shorter wavelength microwave radiation

Why is the ozone layer important for life on Earth?

Which of the following are risks associated with ultraviolet radiation?

Look at the image and identify the group of compounds it belongs to.

What is the molecular formula for an oxygen molecule?

Which of the following are an impact of increased levels of greenhouse gases in the atmosphere?

to provide protection from atmospheric ozone

to provide protection from harmful ultraviolet (UV) radiation

to provide protection from infrared radiation

to prevent inhaling atmospheric pollutants

Why do humans wear sunscreen and sunglasses?

Which of the following is **not** a type of electromagnetic radiation?

Which elements does the molecule in the image contain?

a type of electromagnetic radiation which is emitted from the Sun

compound consisting of chlorine, fluorine and carbon only

an area in the atmosphere where there is a high concentration of ozone

Match the key term with the correct definition.

Starter Quiz

What is the molecular formula for an oxygen molecule?