Heat Energy Transfer

Heat Energy Transfer

This is also called the Law of Conservation of Energy

See if you can remember BEFORE you go to the next slide...

Multiple Choice

CONDUCTION is heat transfer in a _____________

• SOLID

• LIQUID

• GAS

Multiple Choice

RADIATION is heat transfer in a _____________

• SOLID

• LIQUID

• GAS

Multiple Choice

CONVECTION is heat transfer in a _____________

• SOLID

• LIQUID

• GAS

Do a quick search to find GENERAL definitions:

Multiple Choice

Metals are generally...

• BAD CONDUCTORS of thermal energy because their atoms are FAR APART

• GOOD CONDUCTORS of thermal energy because their atoms are FAR APART

• GOOD CONDUCTORS of thermal energy because their atoms are CLOSE TOGETHER

• BAD CONDUCTORS of thermal energy because their atoms are CLOSE TOGETHER

Open Ended

What makes a good thermal insulator?

Explain what you think and give two examples of thermal insulators around you.

Multiple Choice

Which statement is true?

• The quicker a molecule moves, the colder it is.

• The slower a molecule moves, the warmer it is.

• The quicker a molecule moves, the warmer it is

• The movement of molecules don't affect temperature

Multiple Choice

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high
• It can travel high to low and low to high. 

Multiple Choice

At the seashore late in the afternoon on a hot day, a person often feels a strong breeze coming from the ocean because...

• the pounding waves generate air currents
• warm air over the ocean rushes in to replace the cool air that rises over the land
• the heavy, cool air over the ocean rushes in to replace the warm air that rises over the land
• there are no clouds to block the wind coming in from the ocean

Multiple Choice

If differences in air pressure produce winds, what can you conclude about temperature and air pressure based on the figure?

• As warm air rises, it creates an area of lower pressure, and cooler air flows in as wind
• Warm air is denser than cold air is, creating an area of high pressure the produces wind.
• Winds flow from areas of low pressure to areas high pressure when temperature is warmer
• Air pressure decreases at night because temperature is lower, producing land and sea breezes

Multiple Choice

Warm air is __________ dense than cold air and rises creating convection currents.

• more
• less

Multiple Choice

The Law of Conservation of Energy states that

• energy is always created and destroyed.

• energy is neither created or destroyed, it just moves and transforms.

• energy is always created; but never destroyed or transformed.

Multiple Choice

The Second Law of Thermodynamics states that heat will always...

• ...move away from the point of awesomeness.

• ...move from high heat to low heat.

• ...move from low heat to high heat.

• ...remain in equilibrium.

Multiple Choice

Temperature is a measure of the...

• total energy in a substance

• total kinetic energy in a substance

• average potential energy in a substance

• average kinetic energy of molecules in a substance

Multiple Choice

Heat transfer by conduction happens when:

• there is a circulation of hot air/water rising and cold air/water sinking

• there is space that heat travels through in waves outwardly

• two objects are touching and heat moves from one object into the next object

Multiple Choice

_____________________ occurs only in gases and liquids. This is one way heat transfers from one place to another.

• Conduction

• Convection

• Radiation

• Containment

Multiple Choice

In convection currents, the _____________ part rises and the _____________ part sinks.

• warm, cool

• cool, warm

• cold, hot

• cold, cold

Multiple Choice

_______________ is when heat is transferred (or moves) through electromagnetic waves. This can occur in air or space.

• radiation

• conduction

• convection

• rotation

Multiple Choice

Heat transfer is really neat; it always goes from ________ to _________

• cold to hot

• cold to warm

• lukewarm to warmer

• hot to cold

Multiple Choice

____________________ occurs when snowflakes melt in your warm hands.

• convection

• conduction

• radiation

• thermal balance

Multiple Choice

When the temperatures of materials that are in contact are the same, the materials are said to be in

• thermal balance

• equality

• a powerful situation

• thermal equilibrium

Multiple Choice

Which action below is converting electrical to thermal energy?

• An electric vacuum cleaner

• An electric toothbrush

• An electric toaster

Multiple Select

Cool Lesson?

Learn Anything?

• Yes

• No