Review of Layers of the Atmosphere http studyjams

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Review of Layers of the Atmosphere § http: //studyjams. scholastic. com/studyjams/ja ms/science/weather-and-climate/earthsatmosphere. htm

Review of Layers of the Atmosphere § http: //studyjams. scholastic. com/studyjams/ja ms/science/weather-and-climate/earthsatmosphere. htm

Its not cold… Its heat § http: //cheezburger. com/68056065/school-fail -no-such-thing-as-cold

Its not cold… Its heat § http: //cheezburger. com/68056065/school-fail -no-such-thing-as-cold

TEMPERATURE § The measure of the average kinetic energy of the individual particles in

TEMPERATURE § The measure of the average kinetic energy of the individual particles in an object. § Matter is made up of tiny particles called atoms and molecules. These particles are always in motion even if the object they make up isn’t moving at all. Energy of motion is called kinetic energy, so all particles of matter have kinetic energy. The faster the particles are moving, the more kinetic energy they have.

WATER AND DYE EXPERIMENT § Why did the dye in hot water move faster

WATER AND DYE EXPERIMENT § Why did the dye in hot water move faster than the dye in cold water? § The results have to do with the different temperatures of the water.

Back to Experiment § So what explanation would be given if we heated the

Back to Experiment § So what explanation would be given if we heated the cold water. – Its particles will start moving faster, so their kinetic energy will increase. This means that the temperature of the water will rise.

THERMAL ENERGY § The total energy of all the particles. § If 2 samples

THERMAL ENERGY § The total energy of all the particles. § If 2 samples of matter are at the same temperature they do not necessarily have the same total energy.

Reminder: thermal energy § Thermal energy (temperature) is a measure of a particle’s kinetic

Reminder: thermal energy § Thermal energy (temperature) is a measure of a particle’s kinetic motion.

Heat Transfer § Heat transfer is the movement of thermal energy from a warmer

Heat Transfer § Heat transfer is the movement of thermal energy from a warmer item to a cooler item. § Remember, heat moves in predictable ways, from a high to a low.

Which way is thermal energy flowing? § Ice -> hands Or § Hands ->

Which way is thermal energy flowing? § Ice -> hands Or § Hands -> ice

If I open the front door, does the heat go OUT or does the

If I open the front door, does the heat go OUT or does the cold come IN? The thermal energy goes from HOT areas to COLD. The heat goes OUT

https: //www. youtube. co m/watch? v= Akd 7 MMRK Dwc there’s no such thing

https: //www. youtube. co m/watch? v= Akd 7 MMRK Dwc there’s no such thing as cold

Heating of the Earth

Heating of the Earth

§ The Sun provides most of Earth’s energy.

§ The Sun provides most of Earth’s energy.

§ The Sun’s energy can be – Reflected back into space by clouds, particles,

§ The Sun’s energy can be – Reflected back into space by clouds, particles, or Earth’s surface – Absorbed by the atmosphere – Absorbed by the surface- land water

§ This heat energy causes wind and ocean currents. https: //earth. nullschool. net/

§ This heat energy causes wind and ocean currents. https: //earth. nullschool. net/

Three types of heat transfer Conduction Convection Radiation

Three types of heat transfer Conduction Convection Radiation

Conduction § Conduction is heat transfer through solids. § The transfer of heat between

Conduction § Conduction is heat transfer through solids. § The transfer of heat between substances that are in direct contact.

Examples: § Your feet transfer (conduct) heat to a cold tile floor § A

Examples: § Your feet transfer (conduct) heat to a cold tile floor § A spoon placed in hot soup becomes warmer as the spoon conducts heat away from the hot soup

Conduction examples

Conduction examples

§ Conductors are materials that allow heat to pass through easily. § Ex. Metals

§ Conductors are materials that allow heat to pass through easily. § Ex. Metals are the best conductors of heat, whereas air is the worst conductor of heat. § Which one(s) are good conductors?

§ Insulators are materials that do not allow heat to pass through easily §

§ Insulators are materials that do not allow heat to pass through easily § Examples: glass, ceramics and rubber

§ Which spoon is a conductor? Which spoon is an insulator? § Which spoon

§ Which spoon is a conductor? Which spoon is an insulator? § Which spoon would you choose to stir with and why?

–Convection: transfer of heat from one place to another through circulation of material. §Example,

–Convection: transfer of heat from one place to another through circulation of material. §Example, heat flowing through air or water

In the ocean, warm currents move heat from the equator to higher latitudes through

In the ocean, warm currents move heat from the equator to higher latitudes through convection currents. More direct light at the equator = warmer ocean temperatures at the equator

§ Convection occurs in fluids § A fluid is defined as a liquid or

§ Convection occurs in fluids § A fluid is defined as a liquid or gas because fluids have the ability to flow from one place to another § Solids, however, maintain their position

Convection within the Earth Divergent Boundary Mid Ocean Ridge Material in the mantle is

Convection within the Earth Divergent Boundary Mid Ocean Ridge Material in the mantle is heated by the outer core and it rises, pushing apart the plates of the crust Convergent Boundary Trench

§ How do you feel the Sun’s heat even when you aren’t in direct

§ How do you feel the Sun’s heat even when you aren’t in direct contact with it?

Radiation: transfer of heat from one place to another in the form of rays

Radiation: transfer of heat from one place to another in the form of rays or waves. Examples heat from the sun, microwave

§ Heat can travel in waves without a medium (a liquid, solid, or gas).

§ Heat can travel in waves without a medium (a liquid, solid, or gas). § Radiation is the term that describes heat movement without a medium of matter.

So how does an igloo keep us warm? https: //www. youtube. com/watch? v=1 L

So how does an igloo keep us warm? https: //www. youtube. com/watch? v=1 L 7 EI 0 v. KVu. U

Review § § § Conduction Convection Radiation

Review § § § Conduction Convection Radiation

Convection Conduction

Convection Conduction

Conduction Convection Radiation Conduction

Conduction Convection Radiation Conduction

§ Can you explain why you feel warm when you are standing away from

§ Can you explain why you feel warm when you are standing away from a campfire? – Radiation § Why does a carpeted floor feel warmer to bare feet than tile even though both surfaces are the same temperature? – Better insulator

Name each type of heat transfer

Name each type of heat transfer

Review Videos § http: //www. wisconline. com/objects/heattransfer/ § (with audio) § http: //vitalnj. pbslearningmedia.

Review Videos § http: //www. wisconline. com/objects/heattransfer/ § (with audio) § http: //vitalnj. pbslearningmedia. org/asset/lsps 07_int_heattransfer/ § PBS heat transfer tutorial http: //www. youtube. com/watch? v=wr 8 Z 4 SCE TPs Heat transfer song, by Mr. Parr

§ What information would you need in order to predict whether heat transfer would

§ What information would you need in order to predict whether heat transfer would occur when two objects or materials interact? – Are they the same temperature? If no, then heat will flow from the hotter object to the colder one. – Is it an insulating material or a conducting material? If it is insulating, there will be little or no heat transfer.