1. Weather and Oceans Test

2. 1. Lines of equal air pressure on a weather map are called Isobars 2. Lines of equal temperature are called Isotherms

3. 3. Draw what hot air molecules look like: Draw what cold air molecules look like: Label the circle that is most dense and the circle that is least dense. least dense Most dense

4. 4. Why is air pressure highest closest to sea level on Earth? More air molecules due to gravity 5. High pressure systems are associated with Happy, clear weather. 6. Low pressure systems are associated with Lousy, cloudy weather.

5. 7. What heats up the atmosphere fueling the water cycle? The Sun 8.Why does oil float on water? It is less dense

6. 9. Air Molecules Comparison: Top of Mountain to Bottom of Mountain What makes the air molecules different from the top and the bottom of the mountain? gravity

7. 10. Draw a convection current, include the sun, and labels describing what type of air rises and what type of air sinks. Why is this current important? Convection currents create weather and winds on Earth, they distribute heat from the tropics to other parts of the Earth

8. 11. What fuels hurricanes? Warm air and water in tropical oceans 12. Why do hurricanes form in the area around the equator? Air and water is warmed by the Sun. Those areas of the world are receiving more direct sunlight. 13.Why are hurricanes important to Earth? They move heat from the tropics, though destructive, without them, the tropics would be too hot for anyone to live there.

9. 14. What is humidity? The moisture that is available in the atmosphere 15. Draw the symbols for warm, cold, stationary and occluded front: 16. What direction does weather travel across the U.S.? West to East

10. 17. What kind of weather does a cold front bring?: thunderstorms form along a cold front, followed by clear cold weather 18. What kind of weather does a warm front bring?: several days of rain can be expected 19. Describe an occluded front: When a warm air mass is trapped between two cold air masses; cold rain can be expected 20. Describe a stationary front: When a cold and warm air mass meet, but neither is strong enough to move the other out of the way. Several days of fog and rain can be expected.

11. 21. What is an air mass? A body of air with certain similar characteristics like temperature and humidity. 22. An air mass that forms over water will be wet. 23. An air mass that forms over land will be dry.

12. 24. An air mass that forms over the equator will be warm. 25. An air mass that forms over the polar regions will be cold. 26. Air masses have the same conditions as The area where they are formed. 27. The movement of air masses causes changes in weather.

13. Maritime Polar Maritime Tropical Continental Polar Continental Tropical

14. Which air mass brings cold and dry air? Continental Polar Which air mass brings wet and warm air? Maritime Tropical

15. 29. Cold water currents have a cooling effect on the continental coastlines they touch. 30. Warm water currents have a warming effect on the continental coastlines they touch. 31. Cities with mountains blocking the ocean air tend to be dry and cold. 32. Cities by the coast tend to get a lot of rain. 33. Cities in the center of the continent tend to be cold and dry. 34. Where does most marine life live? By the coast, water is shallow, tends to be warm and has lots of nutrients

16. 35. What are the types of fronts on the map? Cold, warm and occluded 36. What type of pressure is over the state of New York? High 37. Where do you predict the cold front will be October 14, (tomorrow)? Further east and south

17. 38. 39. How does moving air affect global temperatures? Warm air and cold air is distributed in convection currents as warm air rises and cool air sinks. High pressure areas move to low pressure areas, making global temperature more evened out.

18. 40.Is this high pressure or low pressure? High, because the pressure increases as you go to the center Here is another example…