heat transfer, water cycle, air pressure, masses and fronts by: brianna shields november 14, 2005...
Post on 22-Dec-2015
214 views
TRANSCRIPT
Heat Transfer, Water Cycle, Air Pressure, Masses and Fronts
Heat Transfer, Water Cycle, Air Pressure, Masses and Fronts
By:Brianna Shields
November 14, 2005
By:Brianna Shields
November 14, 2005
DO NOWDO NOW
Get your water cycle, heat transfer and air pressure notes and homework out on your desk
Listen to this podcast about hurricanes. 1. What has been happening to the number of
hurricanes each year over the past several years? 2. Is global warming playing a role in the number of
hurricanes that we are experiencing? 3. When might global warming play the largest role?
Get your water cycle, heat transfer and air pressure notes and homework out on your desk
Listen to this podcast about hurricanes. 1. What has been happening to the number of
hurricanes each year over the past several years? 2. Is global warming playing a role in the number of
hurricanes that we are experiencing? 3. When might global warming play the largest role?
Water CycleWater Cycle
Describe the goal of the water cycle
Describe the goal of the water cycle
To recycle and purify fresh water from the Earth
To recycle and purify fresh water from the Earth
Water CycleWater Cycle
Diagram Diagram A= evaporation B= Condensation C= Precipitation
A= evaporation B= Condensation C= Precipitation
Water CycleWater Cycle
Evaporation
Evaporation
Sun heats liquid water into gaseous vapor (rises into air)
Sun heats liquid water into gaseous vapor (rises into air)
Water CycleWater Cycle
Condensation
Condensation
Warm water vapor rises, cools, condenses into drops held by clouds
Warm water vapor rises, cools, condenses into drops held by clouds
Water CycleWater Cycle
Precipitation Precipitation Water drops in clouds get too heavy and fall back to earth
Water drops in clouds get too heavy and fall back to earth
Heat TransferHeat Transfer
Conduction Conduction Definition: The transfer of heat between
two touching solids when atoms vibrate
Good conductors transfer heat well
Examples: Metal pan with a metal
handle Pan on a stove
Definition: The transfer of heat between
two touching solids when atoms vibrate
Good conductors transfer heat well
Examples: Metal pan with a metal
handle Pan on a stove
Heat TransferHeat Transfer
Convection Convection Definition: Heated fluid circulates to
even out temperatures Hot fluids rise, cold fluids
sink Examples:
Water boiling in a pot Air in a room
Definition: Heated fluid circulates to
even out temperatures Hot fluids rise, cold fluids
sink Examples:
Water boiling in a pot Air in a room
Heat TransferHeat Transfer
Radiation Radiation Definition: Heat released from an object
in invisible waves All objects radiate
Examples: Sun Night Vision Goggles
Definition: Heat released from an object
in invisible waves All objects radiate
Examples: Sun Night Vision Goggles
Heat Transfer HomeworkHeat Transfer Homework
Q: Refrigerators have cooling coils in the top of them, rather than at the bottom. Explain why. What type of heat transfer helps explain this?
A: Convection- coils are at top because cold air sinks, and cold air must fall/pass through entire fridge to cool it (if at bottom, it would never cool items at top)
Q: Refrigerators have cooling coils in the top of them, rather than at the bottom. Explain why. What type of heat transfer helps explain this?
A: Convection- coils are at top because cold air sinks, and cold air must fall/pass through entire fridge to cool it (if at bottom, it would never cool items at top)
Heat Transfer HomeworkHeat Transfer Homework
Q: If you set two identical cups of hot cocoa side by side and set a metal spoon in one, which will cool faster? Explain why. What type of heat transfer helps explain this?
A: Conduction- one with metal spoon cools faster because metal is a better conductor and efficiently transfers heat from cocoa to the air.
Q: If you set two identical cups of hot cocoa side by side and set a metal spoon in one, which will cool faster? Explain why. What type of heat transfer helps explain this?
A: Conduction- one with metal spoon cools faster because metal is a better conductor and efficiently transfers heat from cocoa to the air.
Heat Transfer HomeworkHeat Transfer Homework
Q: Why do you get hotter in the summer while wearing a black shirt rather than a white shirt? Explain why. What type of heat transfer helps explain this?
A: Radiation- sun’s invisible waves heat the black shirt better because black absorbs heat hetter than white
Q: Why do you get hotter in the summer while wearing a black shirt rather than a white shirt? Explain why. What type of heat transfer helps explain this?
A: Radiation- sun’s invisible waves heat the black shirt better because black absorbs heat hetter than white
All About AirAll About Air
What is air pressure?
What is air pressure?
Force exerted by weight of tiny air particles
Force exerted by weight of tiny air particles
All About AirAll About Air
What type of weather occurs when there is high pressure?
What type of weather occurs when there is high pressure?
Cool temperatures and clear skies
Cool temperatures and clear skies
All About AirAll About Air
What type of weather occurs when there is low pressure?
What type of weather occurs when there is low pressure?
Warmer weather, storms and rain
Warmer weather, storms and rain
All About AirAll About Air
Where in Earth’s atmosphere is air pressure the least?
Where in Earth’s atmosphere is air pressure the least?
At high elevations (less columns of air above) Ex: Mountains
At high elevations (less columns of air above) Ex: Mountains
All About AirAll About Air
Why doesn’t air pressure crush you?
Why doesn’t air pressure crush you?
There is air inside your body balances the air pushing from outside
Keeps your body firm
There is air inside your body balances the air pushing from outside
Keeps your body firm
All About AirAll About Air
Where on Earth is air pressure the greatest?
Where on Earth is air pressure the greatest?
At low elevations, below sea level (more columns of air pushing down)
At low elevations, below sea level (more columns of air pushing down)
All About AirAll About Air
What effect does temperature have on air pressure?
What effect does temperature have on air pressure?
Warm air (less particles) = less pressure
Cold air (tighter particles) = greater pressure
Warm air (less particles) = less pressure
Cold air (tighter particles) = greater pressure
All About AirAll About Air
What effect does water vapor have on air pressure?
What effect does water vapor have on air pressure?
Air with water vapor WEIGHS LESS (less pressure) than dry air
Air with water vapor WEIGHS LESS (less pressure) than dry air
All About AirAll About Air
What weighs more- cold air or warm air? Explain
What weighs more- cold air or warm air? Explain
Warm air weighs less Cold air weighs more
Warm air weighs less Cold air weighs more
All About AirAll About Air
What weighs more- dry air or moist air? Explain
What weighs more- dry air or moist air? Explain
Dry air weighs more than moist air (water vapor is very light!)
Dry air weighs more than moist air (water vapor is very light!)
All About AirAll About Air
How is air pressure represented on a weather map?
How is air pressure represented on a weather map?
Use isobars (rings) to connect areas of equal pressure
Use isobars (rings) to connect areas of equal pressure
All About AirAll About Air
On the map, create isobars and label where the high pressure and the low pressure systems would be:
On the map, create isobars and label where the high pressure and the low pressure systems would be:
All About AirAll About Air
What is an air mass?
What is an air mass?
Air with a certain temp and amount of moisture covering a large area
Air with a certain temp and amount of moisture covering a large area
All About AirAll About Air
Describe a tropical maritime air mass. What is the abbreviation used for it on a weather map?
Describe a tropical maritime air mass. What is the abbreviation used for it on a weather map?
Air mass formed over warm water
Air mass formed over warm water
All About AirAll About Air
Describe a tropical continental air mass. What is the abbreviation used for it on a weather map?
Describe a tropical continental air mass. What is the abbreviation used for it on a weather map?
Air mass formed over warm land
Air mass formed over warm land
All About AirAll About Air
Describe a polar continental air mass. What is the abbreviation used for it on a weather map?
Describe a polar continental air mass. What is the abbreviation used for it on a weather map?
Air mass formed over cool land
Air mass formed over cool land
All About AirAll About Air
Describe a polar maritime air mass. What is the abbreviation used for it on a weather map?
Describe a polar maritime air mass. What is the abbreviation used for it on a weather map?
Air mass formed over cool water
Air mass formed over cool water
All About AirAll About Air
How are fronts created?
How are fronts created?
Boundary between two meeting air masses
Boundary between two meeting air masses
All About AirAll About Air
How is a warm front created?
How is a warm front created?
Warm air is replacing cold air by going up over it
Warm air is replacing cold air by going up over it
All About AirAll About Air
What type of weather does a warm front bring?
What type of weather does a warm front bring?
Warm, light rain for a long time
Warm, light rain for a long time
All About AirAll About Air
How is a cold front created?
How is a cold front created?
Cold air replacing warm air by scooping it into air (clouds form)
Cold air replacing warm air by scooping it into air (clouds form)
All About AirAll About Air
What type of weather does a cold front bring?
What type of weather does a cold front bring?
Cool, short but heavy precipitation
Cool, short but heavy precipitation
All About AirAll About Air
How is a stationary front created?
How is a stationary front created?
A front that has stopped moving
A front that has stopped moving
All About AirAll About Air
What type of weather does a stationary front bring?
What type of weather does a stationary front bring?
Stormy, rainy Stormy, rainy
All About AirAll About Air
Draw a warm front symbol
Draw a warm front symbol
Symbol: Symbol:
All About AirAll About Air
Draw a cold front symbol
Draw a cold front symbol
Symbol: Symbol:
All About AirAll About Air
Draw a stationary front symbol
Draw a stationary front symbol
Symbol: Symbol:
All About AirAll About Air
Label each of the pictures of fronts below as warm, cold or stationary
Label each of the pictures of fronts below as warm, cold or stationary
Map: Map: