Heating Differences Lab Hypothesis #1: Which do you think will heat up faster----- sand or water? Hypothesis #2: Which do you think will cool faster---- sand or water? Conclusion pg. 547 #’s 1-8 - Write down all questions except for #1 It’s a Graph … yes you need to do it.

Heating Earth’s Surface Data Table Temperature with Light On (ºC) Temperature with Light Off (ºC) Time (min) Sand Water start 16 1 17 2 18 3 19 4 20 …. 15 30

Heating Earth’s Surface Temperature with Light On (ºC) Starting Temperature: ______ _______ Temperature with Light Off (ºC) Time (min) Sand Water 1 16 2 17 3 18 4 19 5 20 6 21 7 22 8 23 9 24 10 25 11 26 12 27 13 28 14 29 15 30 Heating Earth’s Surface

Conclusion pg. 547 #’s 1-8 Write down all questions except for #1 It’s a Graph … yes you need to do it.

Everyday is a Holiday! National dessert day!

III. Winds & Fronts

A. How wind develops: -Caused by a difference in air pressure due to unequal heating of the atmosphere. Two types of winds: a. local b. global

B. Winds are created by…. 1. Heating the air, decreases pressure (warm air rises creating low pressure) 2. Cool air rushes into replace the warm air (cooler dense air, produces high pressure) 3. As air goes from high to low pressure, winds form.

C. Local Winds Sea breeze- warm air expands & rises over land, & cool sea/lake air moves toward the land.

2. Land breeze- warm air over water rises, cool land air moves toward the water.

Remember! Air rises over warm areas and sinks over cold areas Air rises in warm regions where pressure is low (convection) ex the tropics Air descends in cold areas where pressure is high (subsidence) ex the poles

D. Global Winds 1. Don’t travel North and South because of the Earth rotating on its axis. a. 4 Types of Global Winds – Doldrums: calm, warm winds at equator – Trade Winds: 30° N&S of equator, gentle/sinking air – Prevailing Westerlies: 30-60° Strong (big temp. diff.), impacts U.S. weather – Polar Easterlies: 60-90° cold, weak winds from poles

D. Global Winds Polar Easterlies c. b. Cool air descend d. Prevailing Westerlies e. Trade winds f. a. Warm air rises Doldrums e. Trade winds d. Prevailing Westerlies c. Polar Easterlies

E. Coriolis Effect 1. Winds do not blow directly from high to low pressure …. they get deflected by the Coriolis force (rotation of the Earth)

Earth Science Bellringer Get out comp. book and turn to Assignment #6: Heating Differences Lab Come get a stamp if your lab is ALL completed!

F. North American Air Masses Temperature 1. Air masses from N 50º latitude POLAR (P) 2. Air masses from the tropics TROPICAL (T)

North American Air Masses Humidity 1. Air masses from over oceans MARITIME (m) 2. Air masses from over land CONTINENTAL (c)

Local Air Masses cP 2. 4. 1. mP mP cP 3. 6. cT 5. mT mT 7.

G. Front 1. The Boundary between two different air masses. a. Water vapor drives storm systems

D. Types of Fronts Name: Cold Front What’s happening: cold air moves into warm air Result: Lot’s of rain, cool temps, thunderstorms

Name: Warm front What’s happening: warm air moves into cold air Result: little rain/clouds, warmer temps.

Name: Stationary front What’s happening: neither masses move the other Result: clouds & precipitation

Name: Occluded front What’s happening: warm air mass caught between cold air masses Result: warm air cut off, cloudy & rain

CBA : Wind/Front Textbook Time! Pg. 530 #’s 6 all,7 all, & 8 a-b (black book) pg. 585 #’s 1-2 (red book) Sketch & color figure 2 pg. 579 (red book) Create, Draw & color a weather Super Hero or Villain. Include your hero/villains powers and weaknesses Give your hero/villain a catchy name & costume

Wind/Front Quiz template (next class) Know how altitude and air pressure are related What are low & high pressure air masses made of, what’s their result How are pressure and wind speed related How wind develops Differences between sea breeze/ land breeze Global winds & why they are weak or strong What a front is. What two things describe an air mass Instruments used to measure air pressure What is air pressure? Here? Sea Level? Measured in what?