CLIMATE AND ATMOSPHERE

1. SCIENCE Topic Atmosphere and Climate UNIT 5.5 PAGE 177 BY MR. ARAH, A.I

2. LESSON 1

3. Starter Task • Let’s watch a video about the atmosphere. • From the video, • Why do you think the atmosphere is important for life on Earth?

4. Discuss the composition and structure of Earth’s atmosphere. • Understand how the atmosphere affects Earth's climate. LEARNING OBJECTIVES

6. Let’s visit page 179 in our textbook to see changes in the atmosphere over the years

7. Task 1 • Attempt questions 4-7 in page 180

9. Let’s watch another video about the layers of the earth’ atmospheres. • From the video, • Copy and complete this table

10. LESSON 2 How the atmosphere affects Earth's climate

11. Starter Task • Analyze this chat and write your feedback

12. LEARNING OBJECTIVES Describe what an analogy is and how it can be used as a model Learn about how earth’s climate has changed

14. How Earth’s climate has changed • 1. The Greenhouse Effect • Definition: The greenhouse effect occurs when gases in the atmosphere, such as carbon dioxide (CO₂), methane (CH₄), and water vapor, trap heat from the Sun. • Process: • Solar radiation enters Earth's atmosphere and warms the surface. • The Earth emits this energy as infrared radiation (heat). • Greenhouse gases absorb and re-emit some of this heat back toward the surface, keeping the planet warm. • Impact: Without this natural effect, Earth's average temperature would be about 33°C colder, making it inhospitable for most life.

15. 2. Albedo Effect • Definition: Albedo is the measure of how much sunlight is reflected by Earth's surface. • Process: • Bright surfaces like ice and snow reflect sunlight, reducing heat absorption. • Darker surfaces like oceans and forests absorb more heat. • Impact: Changes in surface cover (e.g., melting ice) can alter the balance of heat absorption and reflection, influencing climate.

16. 3. Atmospheric Circulation • Definition: The movement of air due to differences in temperature and pressure distributes heat across the planet. • Process: • Warm air rises at the equator and moves toward the poles, while cooler air sinks and flows back toward the equator. • This creates wind patterns and ocean currents that help regulate temperature.

17. 4. Ozone Layer • Definition: The ozone layer in the stratosphere absorbs harmful ultraviolet (UV) radiation from the Sun. • Impact: By filtering UV radiation, it prevents overheating of Earth's surface and protects living organisms. • 5. Carbon and Water Cycles • Carbon Cycle: The atmosphere exchanges CO₂ with oceans, forests, and soil, influencing global temperatures. • Water Cycle: Water vapor, a greenhouse gas, regulates temperature and drives weather patterns.

18. 6. Human Impact on the Atmosphere • Activities such as burning fossil fuels, deforestation, and industrial processes increase greenhouse gas concentrations. • This enhances the greenhouse effect, leading to global warming and climate change.

19. HOME PROJECT USING ANY MATERIAL OF YOUR CHOICE, CONSTRUCT ANY MATERIAL THAT CAN SERVE THE PURPOSE OF AN ANALOGY FO THE LAYERS OF THE EARTH’S ATMOSPHERE DUE DATE: Monday 27th January, 2025

20. LESSON 3 CLIMATE CHANGE

21. Starter Task What are your thoughts on climate change?

22. LEARNING OBJECTIVES • Explain the term climate change • Discuss the concept of global warming, of causes global warming and carbon foot print

27. LESSON 4 RENEWABLE ENERGY AND BIOPLASTICS

28. Starter Task What are your thoughts on climate change?

29. LEARNING OBJECTIVES • Describe renewable energy • Identify and explore the concept of bioplastics with examples

32. CLASS DEBATE TOPIC: NOMAL PLASTICS ARE BETTER THAN BIOPLASTICS