1. Earth Science Unit Overview: Chapter 4 – Earth’s Water Lesson 1 – Earth: The Blue Planet Lesson 2 – The Water Cycle Lesson 3 – Fresh Water Resources Lesson 4 – California’s Water Supply Chapter 5 – Earth’s Weather Lesson 1 – Earth’s Atmosphere Lesson 2 – Air Current and Wind Lesson 3 – Ocean’s and Air Temperature Lesson 4 – Severe Weather Lesson 5 – Predicting Weather Chapter 6 – The Solar System Lesson 1 – The Sun Lesson 2 – The Structure of the Solar System Lesson 3 – Gravity and Orbit

2. Air Currents and Wind Lesson Overview: 1) What do we already know? (BrainPop)BrainPop 2) Vocabulary 3) Drawings 4) Main Ideas 5) Review Earth’s Weather: Lesson 2

3. Air Currents and Wind What do we already know? BrainPOP Teaser BrainPOP Teaser 1)What is air pressure? a) The force put on a given are by the weight of the air above it. 2)What variables can change air pressure? a) temperature, altitude, humidity, volume 3) What happens to air pressure when air is cooled? a) The air is more dense. Page 1 Earth’s Weather: Lesson 2

4. Air Currents and Wind: Vocabulary Part I 1) convection: is the transfer of heat through the movement of gas or liquid. 2) Global wind: blow steadily in a predictable direction. Page 2 Earth’s Weather: Lesson 2

5. Air Currents and Wind: Drawings (pg. 244) Page 3 Earth’s Weather: Lesson 2

6. Air Currents and Wind: Drawings (pg. 245 ) Page 4 Earth’s Weather: Lesson 2

7. Air Currents and Wind: Drawings (pg. 246 ) Page 4 Earth’s Weather: Lesson 2

8. Air Currents and Wind: Main Ideas 1)Why are temperatures different around the world? (pg. 244-245)  a) The angle of the sun hitting the Earth and land heats up and cools off quicker than large bodies of water Quick Check (pg. 245) -Critical Thinking: On what part of Earth is sunlight the least concentrated?  a) the North & South Poles Page 5 Earth’s Weather: Lesson 2

9. 2) How do land and water temperatures affect air pressure? (pg. 246-247)  a) Land warms the air which lowers air pressure and water cools it down which increases air pressure Quick Check (pg. 247) -Why does convection happen in liquids and gases but not in solids: ?  a) molecules in liquid and gas transfer heat through MOTION. Molecules in solids can not move around, so they can not transfer heat through MOTION. Air Currents and Wind: Main Ideas Page 6 Earth’s Weather: Lesson 2

10. 3) What are global winds? (pg. 248)  a) Are steadily blowing winds that blow over long distances and are predictable Quick Check (pg. 248) - What causes global winds? a) The sun heats the Earth near the equator more than it does near the poles. This means that the air near the poles are colder, denser and has higher air pressure than the air near the equator. This causes warm air with low pressure to rise near the equator and the cooler, high pressure air to move in and take its place. Air Currents and Wind: Main Ideas Page 7 Earth’s Weather: Lesson 2

11. Air Currents and Wind: Review 1)Summarize the main ideas 1)Click to Watch!Click to Watch! 2)Think, Talk, and Write Page 8 Earth’s Weather: Lesson 2