WorksheetsEnergy unit assessment
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Name (first and last)
4 lines
2.
Sunlight passes through the windows of a car and causes the car seats to get hot. Which type of energy flow is involved in heating the seats?
a)
conduction
b)
convection
c)
insulation
d)
radiation
3.
Which picture below shows the transfer of heat by conduction?
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
4.
The BEST example of heat transfer by convection is when
a)
sunlight warms soil
b)
a fan blows air
c)
flames heat up a frying pan
d)
heat rises in a chimney
5.
Which of these materials transfers heat energy quickest?
a)
metal
b)
glass
c)
plastic
d)
wood
6.
Students measure the temperature of water inside four different beakers. They measured the temperature again two hours later. What can the students conclude from the data listed below:
a)
Cloth is a better insulator than metal foil.
b)
Paper is a better insulator than cloth
c)
Plastic film is a better insulator than paper.
d)
Metal foil is a better insulator than plastic film.
7.
Hot objects begin to cool as
a)
cooler air is transferred to the object.
b)
energy in the object is transferred to the surrounding air.
c)
atoms in the object react with the oxygen in the air.
d)
energy in the object cancel out energy in the air.
8.
Which of the following statements about thermal energy is true?
a)
As you hold a cup of hot water your hands cool the water.
b)
As you hold a glass of cold milk, the cold travels to your hand.
c)
As you hold a cup of cold milk, your hand cools the milk.
d)
As you hold a cup of hot water, the heat moves to your hand.
9.
In an investigation, water in a flask is placed on a hot plate. As the water is heated, the cooler, denser water at the surface sinks and pushes the warmer water to the top. What do the arrows in the drawing MOST likely represent?
a)
phase changes
b)
convection currents
c)
electromagnetic radiation
d)
energy transfer by conduction
10.
How does the color of an object affect the amount of energy it receives from sunlight?
a)
Light colored objects reflect more light and become warmer than darker objects.
b)
Light colored objects absorb more light and become warmer than darker objects.
c)
Dark colored objects reflect more light and become warmer than lighter objects.
d)
Dark colored objects absorb more light and become warmer than lighter objects.
11.
The diagram shows a metal strip connected by wires to a battery and light bulb. The metal being tested in this setup would best be described as a __________?
a)
insulator
b)
medium
c)
neutralizer
d)
conductor
12.
Students want to raise the temperature of water in a glass jar. The jar is on a table in full sunlight. The fastest way to increase the temperature without using a hot plate is to place
a)
a straw in the water.
b)
clear plastic wrap around the glass.
c)
a thermometer in the water.
d)
black material around the glass.
13.
Gabriella is in a room that has an air temperature of 25ºC (77ºF). Before pouring cold water into a glass, she notices that the ice in the pitcher is melting. What would be the BEST way for Gabriella to describe how thermal energy is being transferred?
a)
Heat moves from the ice to the water.
b)
Cold moves from the ice into the water.
c)
Heat moves from the air into the water.
d)
Cold moves from the water into the room.
14.
Object A is 25 degrees Celsius and mixes with object B that is 15 degrees Celsius. What is the direction of heat flow?
a)
heat flows from B to A
b)
cold flows from B to A
c)
heat flows from A to B
d)
cold flows from A to B
15.
Which material BEST conducts electricity?
a)
wool coat
b)
copper wire
c)
plastic straw
d)
wooden stick
16.
In the diagram below, the electricity flows from the energy source to the lightbulb. The path that if follows is known as a
a)
lap
b)
circuit
c)
orbit
d)
trip
17.
Which of the following would make the BEST insulator against the flow of electricity?
a)
copper wire
b)
steel tubing
c)
plastic tape
d)
aluminum foil
18.
After playing outside on a cold day, Jaime went inside to wash his hands. Although the water was normal temperature, he noticed that it felt warmer than usual. What would explain this phenomenon?
a)
His body had more kinetic energy than the water.
b)
Heat flowed from a cooler substance to a warmer substance.
c)
The water from the faucet had a higher temperature than his skin.
d)
The thermal energy in the room was higher than the thermal energy outside.
19.
The picture shows a spoon being used to stir a pan of hot soup. Which of the following spoon handles would get hot the quickest?
a)
a metal spoon
b)
a plastic spoon
c)
a wooden spoon
d)
a rubber spoon
20.
Anita heats a beaker containing water. As the temperature of the water increases, which change to the water molecules occurs? *
a)
The molecules move at a faster rate.
b)
The molecules become more massive.
c)
The molecules expand and become wider.
d)
The molecules separate into atoms of hydrogen and oxygen.
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