1. The air pressure acting upon the roof of your house
CRCT Question
The air pressure acting upon the roof of your house
comes from the air within a few feet of your roof.
is greater on top of the roof than below it .
comes from every direction around your roof.
is greater underneath your roof than on top of it.

2. What makes music on your head? A head Band
Corny Joke of the Day
What makes music on your head? A head Band

3. Week at a Glance
Monday: No School Tuesday: Test Wednesday: Workday and preview Weather HW: Make sure project is ready to go! Thursday: Cloud Notes, Project due AT THE END OF THE DAY HW: None

4. Ocean Projects
Overall, great job!!!! Very high scores  Circled score is your SUMMATIVE average for the project!

5. 10 points each Great study tool for test!
Quiz Answers
10 points each Great study tool for test!

6. Review
Time

7. Part 1. Wind Classwork Answers

8. Land heats up faster than water. Warm air over land rises.
Land heats up faster than water.
Warm air over land rises.
Air over water moves to shore.
Would occur during the day.
Named a SEA breeze because it comes from the sea.

9. Land cools off faster than water. Warm air over water rises.
Land cools off faster than water.
Warm air over water rises.
Cool air from land takes its place.
Would occur at night.
Called a LAND breeze because the wind is coming from the land.

10. Closer Look at Local Wind
When Air WARMS up
When air heats up, it loses mass and becomes less dense.
The air becomes more spread out
Because of this, warm air will rise
When Air COOLS down
When air cools down, it gains mass and becomes more dense
The air will sink

11. Animated Version
ontent/visualizations/es1903/es1903page01.cfm

12. Polar Easterlies
Westerlies
Trade Winds
Poles to 60˚
Cold air
Moist air
More dense=sink
United States
Early Sailors
30˚ to 60˚
30˚ to equator

13. Global or Local Wind ?????
Air over land is cooler and forms an area of high pressure. The cool air moves toward the ocean.
Polar Easterlies
Generally moves over short distances
Jet stream
Caused by unequal heating over a large area
Can blow from any direction
Land breeze
Is effected by the Coriolis Effect
Caused by unequal heating within a small area
Valley breeze

14. The Doldrums
Blows from a specific direction from day to day
Sea breeze
Horse latitude
Effected by local geographic features
Westerlies
Caused because the angle of the sun giving the equator more direct sunlight
Mountain breeze
Trade winds
During the day, air over the ocean is cooler and forms an area of high pressure. The cool air flows to the land

15. Part 2. Atmosphere flow chart Helpful hint: Atmosphere
Properties Layers Heat transfer

16. Part 3. Atmosphere Study Guide

17. 1. What are the two most abundant elements in the atmosphere (percentage)?
1. Nitrogen – 78% 2. Oxygen – 21%

18. Water that is in a gas form
2. What is water vapor?
Water that is in a gas form
source of water: vapor: evaporation from Earth’s surface
This satellite image shows the relative amounts of water vapor: Dark – low water, white – high water vapor

19. 3. What is air pressure and why does it occur?
Air has pressure because it has mass
Air pressure is the measure of the amount of force the air has

20. 4. List the layers of the atmosphere from Earth’s surface to space.
Troposphere – Stratosphere – Mesosphere - Thermosphere

21. 5. What are global winds and give three examples?
Blow from a specific direction year round.
Cover a large area
Curve due to the Coriolis Effect
Caused by the unequal heating of the earth’s surface
the equator gets more direct sunlight causing the air to rise at the equator and sink at the poles.
Examples – trade winds, jet stream, westerlies, and easterlies

23. 6. What is the greenhouse effect?
The warming of the surface and lower atmosphere of Earth
Occurs when water vapor, carbon dioxide, and other gases absorb thermal energy from the sun and do not allow the heat to escape back into space. (Like a greenhouse)
There are Increasing levels of carbon dioxide due to the burning of fossil fuels

25. 7. Where does air pollution come from?
The burning of fossil fuels Causes: Smog and Acid rain

26. 8. What are local winds and give two examples?
Local winds are wind that blow over short distances
Come from any direction
Examples – sea and land breezes

27. 9. What is the Coriolis effect?
The apparent curving of the path of a moving object from an otherwise straight path due to the Earth’s rotation.
Northern Hemisphere: clockwise
Southern Hemisphere: counter-clockwise

28. 10. What causes wind?
Difference in air pressure due to the unequal heating of the Earth’s surface

29. 11. Explain the difference between land and sea breezes.
Land Breeze
Sea Breeze
At Night
During the Day
Land cools faster than water
Land warms faster than water
Warm air over the water rises and cool air from the land replaces it.
Air over the land then rises and cool air from sea replaces it.

30. 12. What is the formula for density?
Density = mass/volume

31. 13. What is the difference between a barometer and an anemometer?
Barometer measures air pressure
Anemometer measure wind speed

32. 14. Define radiation, conduction, and convection
14. Define radiation, conduction, and convection. Give two examples of each.
Radiation- Doesn’t need a substance. Transfer of energy through electromagnetic waves (ex. – campfire, sun’s radiant energy)
Convection – transfer of energy through a fluid (gas or liquid) (ex. – oven, boiling water in a pot)
Conduction – transfer of energy through a material/solid (iron, stove)

34. 15. How are the layers of the atmosphere classified?
By changes in temperature

35. 16. What is the difference between volume and mass?
Volume is the amount of space something occupies
Mass amount of matter in an object

36. 17. Explain the difference between warm and cold air and their density.
Warm air is less dense than cold air
Warm air will create low pressure area and rise
Cold air will create high pressure areas and will replace warm air

37. 18. How does pressure effect density?
Greater pressure =higher density=sink Lower Pressure=lower desnity=rise

38. 19. What happens to air pressure as you increase with altitude?
It decreases
The most pressure is at the surface!

39. 20. What is the difference between local and global winds?
Both are caused by unequal heating of Earth’s surface.
Local Wind
Global Wind
Small area
Large Area
Any direction
Predictable patterns
Sea breeze
Coriolis Effect
Land breeze
Equator getting more DIRECT sunlight

40. Local wind blows in any direction over short distances and are caused by unequal heating in a small area. Global wind blow over long distances in predictable patterns and are effected by the Coriolis Effect. They are caused because the equator gets more direct sunlight and the air rises at the equator and sinks at the poles

41. Part 4: Sink or Swim