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WorksheetsHeat and Electricity Unit Assessment
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
A student holds an ice cube in her hand. After some time passes, the ice cube begins to melt. Which word describes the process of heat transfer?
a)
conduction
b)
convection
c)
insulation
d)
radiation
2.
On a sunny day, Yolanda fills a small backyard pool with water. As time passes, the water warms. Which statement explains this effect?
a)
The sun heats the water through gravity.
b)
The sun heats the water through radiation
c)
The sun heats the water through convection.
d)
The sun heats the water through conduction.
3.
Melinda is trying to understand the difference between heat and temperature. She records some ideas. Which statement is correct?
a)
Heat and temperature are synonyms.
b)
Heat and temperature are antonyms.
c)
Heat is a measure of the hotness or coldness of an object, and temperature is the transfer of energy between objects.
d)
Heat is the transfer of energy between objects, and temperature is the measure of heat energy.
4.
Which of the following is capable of generating heat?
a)
attraction
b)
repulsion
c)
friction
d)
gravity
5.
Each picture shows a source of heat. Which heat source transfers heat energy through radiation?
a)
the sun
b)
boiling water
c)
ice cube melting
d)
stirring hot liquid
6.
a)
Heat from the hot liquid will warm the spoon until the spoon is hotter than the liquid.
b)
Heat from the hot liquid will warm the spoon until they are both the same temperature.
c)
Heat from the hot liquid will warm the spoon, but the liquid will remain hotter than the spoon.
d)
Heat from the hot liquid will not have any effect on a metal spoon, so the spoon will remain cool.
7.
Lu Shen is trying to understand convection. She sees some notes and wonders which to believe. Which statement is correct?
a)
Convection happens when the sun warms Earth.
b)
Convection happens when two solids transfer heat energy.
c)
Convection happens when liquids and gases transfer heat energy.
d)
Convection happens when heat energy is transferred without matter to carry it.
8.
a)
electric charge
b)
electric current
c)
static electricity
d)
electrostatic discharge
9.
An electron has a negative charge. What is true about the charge of a particle that is attracted to an electron?
a)
It is positive.
b)
It is negative.
c)
It is neutral.
d)
It is repulsive.
10.
What is the main difference between an electric current and static electricity?
a)
Electrons in an electric current move by electrostatic discharge.
b)
Electric charges flow in an electric current but not in static electricity.
c)
Static electricity occurs in at least two objects. An electric current occurs in only one.
d)
Negative charges form static electricity. An electric current involves positive charges.
11.
a)
Electrons move to the toy.
b)
Neutrons move to the toy.
c)
Nuclei move to the toy.
d)
Protons move to the toy.
12.
Which object prevents the flow of electric current?
a)
salt water
b)
rubber eraser
c)
steel pan
d)
copper pipe
13.
a)
The light came on, and the buzzer made a sound at the same time.
b)
The light and buzzer stayed off because the light and buzzer have to be in different circuits.
c)
The light and buzzer stayed off because there was no source of electric current in the circuit.
d)
The light and buzzer stayed off because the circuit needs two switches for two different elements.
14.
a)
battery
b)
conductor
c)
generator
d)
insulator
15.
Many homes use electric ovens to cook food. What energy transformation occurs in an electric oven?
a)
thermal energy into light energy
b)
thermal energy into electrical energy
c)
electrical energy into thermal energy
d)
electrical energy into energy of motion
16.
a)
heat energy to sound energy
b)
electrical energy to sound energy
c)
energy of motion to sound energy
d)
electrical energy to energy of motion
17.
An electric clock in a classroom will not run if it is not plugged into an electric outlet. What does the clock get from the electric current from the outlet?
a)
batteries
b)
chemicals
c)
energy
d)
time of day
18.
Liam wants to determine if foam is a good insulator of heat. He pours hot water into a foam cup, and then measures the temperature of the water every few minutes for 20 minutes. Which observation would BEST support the conclusion that foam is a good insulator?
a)
The temperature of the water quickly decreases.
b)
The temperature of the water quickly increases.
c)
The temperature of the water stays about the same.
d)
The temperature of the water is the same as the temperature of the cup.
19.
a)
The circuit lacks a power source.
b)
The circuit is not a complete loop.
c)
The light bulb uses the electric current.
d)
The paper clip stops the electric current.
20.
a)
nail
b)
crayon
c)
eraser
d)
pencil lead
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