Heat Answers

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1
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Shelly tells a friend that her computer needs to be fixed because it has been producing a lot of heat and is smoking. Where is the error in her statement?

A
Heat cannot be described as having been produced.
B
Thermal energy cannot be produced by electronics.
C
Her computer should be producing a lot of heat and does not need to be fixed.
D
Her computer is producing thermal energy, not heat.
2
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A burner on a stove produces

A
temperature.
B
thermal energy.
C
hotness.
D
fire energy.
3

Which best describes the direction of heat?

A
from a substance with no thermal energy to a substance with high amounts of thermal energy
B
from a substance with less thermal energy to a substance with more thermal energy
C
from a cooler substance to a warmer substance
D
from a warmer substance to a cooler substance
4

The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?

A
They must be warmer than the air inside the house.
B
They must be cooler than the air inside the house.
C
They must have more thermal energy than the air inside the house.
D
They must be more insulated than the air inside the house.
5

Isaac wants to make s'mores. He holds a marshmallow on a metal skewer over a fire. A few seconds later, the marshmallow is cooked and the skewer feels warm. What most likely happened?

A
The fire heated the surrounding air, which cooked the marshmallow.
B
The heat generated from the marshmallow flowed in the form of thermal energy to the skewer and fire.
C
The heat from the skewer cooked the marshmallow.
D
Thermal energy in the form of heat moved from the fire to the skewer and marshmallow.
6

Mintu wants to increase the heat transfer between a metal iron and another piece of metal he wants to shape. He decides to increase the time the two metals are in contact, use a larger metal iron, and use a new metal material with a higher specific heat.

A
Mintu should have decreased the size of the metal iron.
B
Mintu should have decreased the time he touches the two metals.
C
Mintu should have chosen a material with a lower specific heat.
D
Mintu should have chosen a material the same temperature as the iron.
7

Ixchelt burns her tongue when she takes a sip of hot coffee from her mug. Which part of this example represents heat?

A
the thermal energy moving from the coffee to her tongue
B
the thermal energy moving from her tongue to the coffee
C
her coffee
D
her tongue
8

If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them?

A
from the hand to the cup
B
from the cup to the hand
C
from the cup to the surrounding air
D
from the hand to surrounding air
9

What must be true about two objects if heat is flowing between them?

A
The objects must be different temperatures.
B
The objects must be the same temperature.
C
The objects must both be over room temperature.
D
The objects must both be under room temperature.
10

Which best explains why water boils in a pot sitting over fire?

A
Heat energy is created from the thermal energy in the air.
B
Heat energy is transferred from the water to the fire.
C
Thermal energy from the fire moves to the water in the form of heat.
D
Thermal energy from the surrounding air moves to the water.

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Heat Answers — PBCSD_Grade_Forgiveness_2003310_P…