Part 1 The development of the Earths atmosphere

Part 1: The development of the Earth’s atmosphere D-Grade Cut out the descriptions and stick them in the bottom boxes on the sheet Use the information to draw a comic strip in the to 5 boxes. During the first billion years the water vapour released by volcanoes cooled down and fell as rain. It formed the first oceans 500 million years the oxygen in the atmosphere started rising as the first land plants evolved. These spread across the Earth’s surface. This made it possible for animals to evolve. The Earth was formed 4. 5 Billion years ago. For the first billion years it was a molten rock with no life. Volcanoes released carbon dioxide, water vapour and nitrogen gas which formed the first atmosphere. After the first billion years (3. 8 billion years ago) life began on earth as single celled organisms. Some started turning carbon dioxide into oxygen by photosynthesis. Humans evolved 200, 000 years ago.

Part 2 C-Grade: Gases in the atmosphere. 1. Draw and label a pie chart of gasses in the early atmosphere. 2. Google: Bitesize the modern atmosphere 3. Fill in the table. 4. Draw and label a pie chart of gases in the modern atmosphere. 5. Cut out and stick in your books 6. Describe the differences between the early and modern atmospheres. The early atmosphere Gas % in atmosphere Carbon dioxide 92 Nitrogen 4 Methane 2 Ammonia 2 The modern atmosphere Gas % in atmosphere