Warm-Up Tuesday, February 19, 2013

1. Warm-Up Tuesday, February 19, 2013 Why do tides occur at different Locations on Earth at different times? The moon revolves around the Earth at a slower speed.

2. Unit 5: Weather S6E4. Students will understand how the distribution of land and oceans affect climate and weather. • a. Demonstrate that land and water absorb and lose heat at different rates and explain the resulting effects on weather patterns. • b Relate unequal heating of land and water surfaces to form large global wind systems and weather events such as tornadoes and thunderstorms. • c. Relate how moisture evaporating from the oceans affects the weather patterns and the weather events such as hurricanes

3. Layers of the Atmosphere

4. What is Air? Air is made up of • 78% Nitrogen • 21% Oxygen • 1% Other gases Did you finish the Atmosphere sheet from Friday? If it’s written in BLUE, write it down.

5. Warm-Up Wednesday, February 20 Which layer of the atmosphere contains the ozone? Stratosphere What does the ozone do? Protects the earth from the Sun’s harmful UV rays.

6. MYP Unit Question: What should I wear today? Area of Interaction: Environment Learner Profile Term: Communicator

7. Opening: • Layers of the Atmosphere Song • Work Session: • Does air have mass? • Notes over the Atmosphere • Closing: Partner Questions

8. Inflating example • Air inside a ball pushes against the sides. The more air we put in a ball, the more the molecules push. So the pressure increases as we add air.

9. Layers of the Atmosphere • Four layers • classified by changes in temperature

10. The Troposphere • Warmed by the earth absorbing energy from the sun. • The air cools by about 6.5°C for every 1-km above the ground.

11. The Troposphere (continued) • Lowest (inner) layer • weather occurs here • we live in it. • “tropo” means turning or changing conditions • depth varies from 9km above the poles to 16km at the equator • shallowest layer, but contains most of the mass.

12. the Stratosphere • Ozone absorbs ultraviolet radiation from the sun, causing the temperature to increase.

13. The Stratosphere (continued) • “strato” means layer or spreading out • Contains the ozone layer (protects earth from harmful UV Rays) • Temperature increases

14. An photo of Earth’s atmosphere taken from space. Stratosphere Troposphere

15. The Mesosphere • This layer does not absorb energy from the sun, so it starts to cool again.

16. The Mesosphere (continued) • Drop in temperature marks beginning of mesosphere • “Meso” means middle • Most meteors burn up here

17. The Thermosphere • Solar radiation first hits this layer, so the few particles that are here can gain lots of energy. They move rapidly, so they have a very high temperature. • But the air is so thin here that it takes special instruments to measure the temperature accurately. • Subdivided into ionosphere and exosphere.

18. The Ionosphere • Upper mesosphere and lower thermosphere. • Energy from sun strips the electrons from the gas molecules creating charged particles called ions. • Radio waves can bounce off of ions, allowing radio waves to travel great distances. • The auroras occur here Ionosphere

19. Aurora Borealis at North Pole

22. Aurora Australis in South Pole

23. The Exosphere • “Exo” means outer • Extends for 1000’s of miles • Satellites orbit here

25. Warm Up Thursday, Feb. 21