AnswersPBCSD_Grade_Forgiveness_2003310_Physical Science_S2_2022Lab: Newton's Laws of Motion

Heat Answers

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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.
2
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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
3

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.
4

A burner on a stove produces

A
temperature.
B
thermal energy.
C
hotness.
D
fire energy.
5

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.
6

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
7

Which substance has the most thermal energy and will have the most heat flow from it?

A
a stovetop burner on medium (200°C)
B
a nuclear reactor core (1000°C)
C
the human body (36°C)
D
air at room temperature (32°C)
8

This chart lists four examples of two objects that are in contact.Which statement accurately describes the flow of heat in each example?

Question illustration
A
Heat will flow from Object 1 to Object 2 in examples 2 and 4, and heat will flow from Object 2 to Object 1 in examples 1 and 3.
B
Heat will flow from Object 1 to Object 2 in examples 1 and 3, and heat will flow from Object 2 to Object 1 in examples 2 and 4.
C
Heat will flow from Object 1 to Object 2 in Example 3, and heat will flow from Object 2 to Object 1 in examples 1, 2, and 4.
D
Heat will flow from Object 1 to Object 2 in examples 1, 2, and 4, and heat will flow from Object 2 to Object 1 in Example 3.
9

Which refers to the amount of heat required to change the temperature of 1 gram of a substance by 1°C and is related to the chemical composition of the substance?

A
Thermal energy
B
Specific heat
C
Activation heat
D
Boiling point
10

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.

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