Worksheets7th 1st semester test review 2022
Total questions: 35
Worksheet time: 18mins
What is Energy?
The ability to do anything
The ability to cause change
The investigation of nature
A fact of life
What is an example of kinetic energy?
A bird sitting in a tree
A bouncy ball on the table
A car driving on the highway
A book on shelf
Energy cannot be created or destroyed.
True
False
Total energy will always change in a system of objects.
True; energy is destroyed due to friction
False; energy cannot be destroyed, only transferred.
Which of the following describes an energy transformation?
When energy is lost due to friction
An electric motor moving a car
A solar panel powering a home
A television projecting a show
At which point does the ball has the greatest gravitational potential energy (GPE)?
A
G
D
C
G
Which would have the LEAST gravitational potential energy (GPE)?
A ball sitting on the ground
Moon viewed from the Earth
An airplane flying 30,000 feet above the ground
A rock sitting on top of Mt. Everest
Gravitational potential energy depends on the strength of gravity, ________ and ________ of the object.
height and mass
friction and movement
mass and movement
height and friction
You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?
W
X
Y
Z
1. As an object falls, what happens to its gravitational energy?
Increases
Decreases
Stays the same
Need more information.
1. As an object falls, what happens to its kinetic energy?
Increases
Decreases
Stays the same.
Need more information
Select the factors that influence how much kinetic energy an object has.
Mass
Speed
Height
Length
Select the factors that influence how much gravitational energy an object has.
Mass
Speed
Height
Length
True or False: A pendulum swings faster in the middle.
True
False
Energy stored because of gravity is called:
Gravitational Potential Energy
Kinetic Energy
Mechanical Advantage
Chemical Energy
How could you increase the gravitational potential energy of an object without changing its mass and gravity?
Make the object larger
Lower the object towards the ground
Raise the object farther off the ground
Allow the object to roll on the ground
How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity?
Decrease the object's mass
Increase the object's height
Increase the object's mass
Decrease the object's height
At which position does the child on the swing have the most gravitational potential energy?
W
X
Y
Z
As an object falls, it looses...
kinetic energy
gravitational energy
heat energy
sound energy
When does an object have the same amount of gravitational energy and kinetic energy?
When it is falling down.
When it is not moving and off the ground.
When it is not moving and on the ground.
When it is being raised up off the ground.
When is the amount of gravitational energy an object has always more than the amount of kinetic energy.
When it is falling down.
When it is not moving and off the ground.
When it is not moving and on the ground.
When it is being raised up off the ground.
Where does an object have NO gravitational energy?
on Mars
on the Moon
on the Earth
in space
A boy holds a book above the floor. He lets go of the book and the book speeds up as it falls to the floor. Which of the following forms of energy are involved in an energy transformation while the book is falling? Explain.
Both gravitational energy and kinetic energy are involved. As the book is falling, its gravitational energy decreases and its kinetic energy increases.
Gravitational energy is involved but kinetic energy is not. As the book is falling, its gravitational energy decreases but its kinetic energy does not change.
Kinetic energy is involved but gravitational energy is not. As the book is falling, its kinetic energy increases but its gravitational energy does not change.
Neither gravitational energy nor kinetic energy is involved. Gravitational energy cannot be changed into kinetic energy, and kinetic energy cannot be changed into gravitational energy
Based on what we observed with energy so far, when one energy increases the other decreases. This means that energy cannot be created nor destroyed it just ___________________________.
changes
Increases
gets created
gets destroyed
A student holds a ball at the top of a ramp. He lets go of the ball and the ball speeds up as it rolls down the ramp.
How do the gravitational energy and the kinetic energy of the ball change as the ball rolls down the ramp? Why?
The gravitational energy decreases and the kinetic energy increases. The gravitational energy is transformed into kinetic energy as the ball rolls down the ramp.
The gravitational energy decreases and the kinetic energy increases. As soon as the ball starts moving it no longer has gravitational energy; it has only kinetic energy.
The kinetic energy and gravitational energy both decrease. Both forms of energy are used up as the ball moves and are not transformed into any other form of energy.
The gravitational energy and the kinetic energy both stay the same. One form of energy cannot be transformed into a different form of energy.
