I. Tick the Correct Option. The Earth’s atmosphere is primarily composed of which two gases? a) Nitrogen and Oxygen Which layer of the atmosphere is responsible for containing the ozone layer? b) Stratosphere What is the main cause of ozone depletion? a) Release of chlorofluorocarbons (CFCs) Global warming refers to the gradual increase in the average temperature of: a) The Earth’s surface and oceans Which international agreement aims to address the issue of climate change and limit global warming to below 2°C? d) United Nations Framework Convention on Climate Change (UNFCCC) II. Fill in the Blanks. 1. The atmosphere is a vital part of our planet, surrounding the Earth in all directions. It consists mainly of gases and dust particles . 2. The difference in air pressure causes the air to move, creating winds. Winds blow from areas of high pressure to areas of low pressure . 3. ...