Plants & the atmosphere
In this lesson we will describe how carbon dioxide and oxygen levels have changed over the Earth’s history and explain how plants have affected the levels of oxygen and carbon dioxide in the atmosphere. We will finish by describing and explaining the impact of recent human activities on carbon dioxide levels.
Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:
- Click "Close Video"
- Click "Next" to view the activity
Your video will re-appear on the next page, and will stay paused in the right place.
These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.