AnswersIL-Science 8 BUnit Test

Temperature and Thermal Energy Answers

10 verified answers1 views
1
Free Preview

Barbara is converting 78°F to degrees Celsius. First, she subtracts 32 from 78. What is the next step?

A
multiply 46 by 5/9
B
multiply 46 by 9/5
C
add 273 to 46
D
subtract 273 from 46
2
Free Preview

A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to drop?

A
The molecules in the water spread apart.
B
The molecules in the thermometer’s liquid spread apart.
C
The kinetic energy of the water molecules decreases.
D
The kinetic energy of the thermometer’s liquid molecules increases.
3

Which type of energy refers to the sum of potential and kinetic energies in the particles of a substance?

A
motion
B
stored
C
internal
D
heat
4

Juan measured the temperature of salt water. He then added 273 temperature units to the measured temperature value. Which temperature conversion is Juan most likely doing?

A
degrees Celsius to degrees Fahrenheit
B
degrees Celsius to kelvins
C
kelvins to degrees Celsius
D
degrees Fahrenheit to degrees Celsius
5

The diagram shows a thermometer used to measure temperature.

Question illustration
A
scale
B
bulb
C
mercury strip
D
number line
6

Which shows the potential energy of particles in three substances, from least to greatest?

A
liquid, solid, gas
B
liquid, gas, solid
C
solid, liquid, gas
D
gas, liquid, solid
7

The diagram shows the scales used for recording temperatures. The labels for the scales are missing.

Question illustration
A
W: FahrenheitX: CelsiusY: Kelvin
B
W: KelvinX: CelsiusY: Fahrenheit
C
W: CelsiusX:FahrenheitY: Kelvin
D
W:CelsiusX: KelvinY: Fahrenheit
8

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

A
The average kinetic energy of the particles in the mug decreases.
B
The average kinetic energy of the particles in the coffee increases.
C
Thermal energy from the mug is transferred to the coffee.
D
Thermal energy from the coffee is transferred to the mug.
9

What happens when the thermal energy of a substance increases?

A
The motion of the particles in the substance increases, and the temperature of the substance decreases.
B
The motion of the particles in the substance decreases, and the temperature of the substance increases.
C
Both the motion of the particles in the substance and the temperature of the substance decrease.
D
Both the motion of the particles in the substance and the temperature of the substance increase.
10

Which best describes thermal energy?

A
It is the difference between internal energies of two or more substances.
B
It is the sum of internal energies of two or more substances.
C
It is the portion of internal energy that can be transferred from one substance to another.
D
It is the portion of potential energy that can be transferred from one substance to another.

Did you find these answers helpful?

More from this Course

Instruction
3 verified answers

Instruction

Assignment
3 verified answers

Temperature and Thermal Energy

Quiz
25 verified answers

Unit Test