12-5:Thermal Transfer

Be Ready to rtake Notes

Right

Left

Glue

Multiple Choice

Which of the following determines the temperature of an object?

• speed of the atoms

• the stillness of antiatoms

• the mass of the object

• the density of the object

Multiple Choice

Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system?

• Thermal energy from the coffee is transferred to the mug.
• Thermal energy from the mug is transferred to the coffee.
• The average kinetic energy of the particles in the coffee increases.
• The average kinetic energy of the particles in the mug decreases.

Fill in the Blanks

Multiple Choice

Which direction is heat flowing in the picture?

• from the hand to the ice
• from the ice to the hand
• heat is not being transferred
• there is no way to tell

Multiple Choice

Which of the following are sources of radiation?

• sun, lightbulbs and heat over a fire

• sun, lightbulbs and heat next to a fire

• boiling water and evaporation

• sun and insulators

Multiple Choice

When heat is transfered by direct contact , the thermal energy transfer is

• conduction

• convection

• radiation

• insulation

Multiple Choice

A hot air balloon rises because the air is heated by ___.

• convection

• conduction

• radiation

• precipitation

Multiple Choice

Heat that comes out to the side of a fire is an example of _________.

• radiation

• conduction

• convection

• transpiration

Multiple Choice

What is true about the transfer of heat from hot tea to the metal spoon?

• Heat goes from the metal to the tea by radiation.

• Heat goes from the hot tea to the spoon by conduction.

• Heat goes from the hot tea to the metal spoon through radiation.

• Hot air rises and warms the air, then the spoon gets hot from the hot air.

Multiple Choice

What happens to the kinetic energy of particles in a substance as it cools down?

• Kinetic energy increases.

• Kinetic energy decreases.

• Kinetic energy remains constant.

• Kinetic energy fluctuates.

Multiple Choice

How does the kinetic energy of particles relate to the temperature of a substance?

• Higher kinetic energy means lower temperature.

• Higher kinetic energy means higher temperature.

• Kinetic energy and temperature are unrelated.

• Kinetic energy is constant regardless of temperature.

Multiple Choice

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

Multiple Choice

When a warm plate is placed onto a cool counter, which most likely

occurs?

• The plate gains heat and the countertop gains heat.

• The plate loses heat and the countertop gains heat.

• The plate gains heat and the countertop loses heat.

• The plate loses heat and the countertop loses heat.

Multiple Choice

George holds an ice cube in his hand. As he squeezes the ice, it begins to melt. Which of the following best explains why this happens?

• George absorbs heat from the ice.
• Heat moves from Abdul’s hand into the cube and warms it.
• Cold moves from the ice onto George’s hand as it melts.
• George releases cold to the ice.

Multiple Choice

Steve knows that heat can transfer between two substances. For example, a warm bowl of soup can warm a metal spoon. Which of the following must be present for heat to flow from one substance to another?

• One of the substances must always be a solid.
• One of the substances must always be a liquid.
• The substances must be at different temperatures.
• The substances must be at the same temperature.

Multiple Choice

Heat flow occurs between two objects when they possess different...

• masses
• temperatures
• densities
• specific heats

Multiple Choice

Heat is

• hot found everywhere.

• the energy that is transferred between objects because of a temperaturedifference

• the quantity measure from the average kinetic energy of vibrating molecules in a substance

• the energy that is destroyed when you put something hot on something cold.

Multiple Choice

A hot object is dropped into a container of cold water. What happens to the molecular motion of the hot object? What happens to the molecular motion of the cold object? 

• the molecules in both objects will slow down until they come to rest
• the molecules of the hot object slow down while the cold speed up
• the molecules of the hot speed up while the cold slows down
• the molecules in both objects will speed up until they reach identical speeds

Multiple Choice

Which of the following statements is true regarding heat energy?

• 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 faster you dance, the quicker you get tired.

Multiple Choice

In heat transfer, heat always flows from the _______________ object to the _______________ object.

• hotter / colder

• colder / hotter

• hotter / hotter

• colder / colder

Multiple Choice

Heat/magma moving under Earth's mantle; hot magma rises and cold magma sinks...

• Conduction

• Convection

• Radiation

Multiple Choice

What is the circular motion of hot air rising and cold air sinking?

• Radiation

• Convection Currents

• Electromagnetic Waves

• Conduction

Multiple Choice

Molecules in cold things move more _________
than in hot things.

• quickly
• slowly
• happily
• merrily

Multiple Choice

Taking a hot air balloon ride is an example of what?

• Radiation

• Conduction

• Convection

Multiple Choice

Which direction will the heat flow while this person holds a hot cup of tea?

• from the cup to her hand

• from her hand to the cup

• no heat is transferred

• Heat does not move

Multiple Choice

Hot fluid rises and cold fluid sinks. Is this true or false

• true

• false

Multiple Choice

Heat will keep moving to cooler object until both objects are the same temperature.

• True

• False

Multiple Choice

Molecules in cold things move more _________
than in hot things.

• quickly
• slowly
• happily
• merrily

Multiple Choice

When the hot iron is placed in the cold water, where will thermal energy transfer?

• energy does not transfer

• from the cold water to the hot iron (water -> iron)

• from hot iron to cold water (iron -> water)

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.