heat transfer, water cycle, air pressure, masses and fronts by: brianna shields november 14, 2005...

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


Diagram Diagram A= evaporation B= Condensation C= Precipitation

A= evaporation B= Condensation C= Precipitation


Evaporation

Evaporation

Sun heats liquid water into gaseous vapor (rises into air)

Sun heats liquid water into gaseous vapor (rises into air)


Condensation

Condensation

Warm water vapor rises, cools, condenses into drops held by clouds

Warm water vapor rises, cools, condenses into drops held by clouds


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


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


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)


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.


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


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


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


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


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


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)


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


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


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


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!)


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


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:


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


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


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


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


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


How are fronts created?

How are fronts created?

Boundary between two meeting air masses

Boundary between two meeting air masses


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


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


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)


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


How is a stationary front created?

How is a stationary front created?

A front that has stopped moving

A front that has stopped moving


What type of weather does a stationary front bring?

What type of weather does a stationary front bring?

Stormy, rainy Stormy, rainy


Draw a warm front symbol

Draw a warm front symbol

Symbol: Symbol:


Draw a cold front symbol

Draw a cold front symbol

Symbol: Symbol:


Draw a stationary front symbol

Draw a stationary front symbol

Symbol: Symbol:


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:

heat transfer, water cycle, air pressure, masses and fronts by: brianna shields november 14, 2005...

Documents

transfer of heat

air slide

type of heat transfer

precipitation slide

earth slide

stove slide

heat transfer homework

water cycle evaporation