Forms of Energy
Potential Energy
Kinetic Energy
Energy Transfer and Transformation
Thermal Energy and Heat
100
Energy related to an objects height
gravitational energy
100
Potential Energy is greatest when an object is
Highest
Lowest
Highest
100
Kinetic energy will ______ the movement of atoms and molecules
Increase
100
As thermal energy is added to a system, it's kinetic energy will _______
Increase
200
A worker is holding a filled gas cylinder still. Which two sentences are true about the energy of the filled gas cylinder?
You must select two
1. It has no energy because it’s being held still.
2. It has gravitational potential energy because of its height.
3. Its atoms and molecules have thermal energy.
4. It has motion energy because it will fall if let go.
5. Its kinetic energy is being converted to potential energy.
2. It has gravitational potential energy because of its height.
3. Its atoms and molecules have thermal energy.
200
Law of conservation of energy states that energy may never be _____ or _____
created
destroyed
200
As a bus travels and utilizes it's kinetic energy, some of the energy is lost as ______
thermal energy
200
Provide at least one example of conduction
Eggs on a frying pan
Burning your hand on a heated surface
etc.
300
This type of energy is stored energy related to
positions of atoms within
molecules
chemical potential energy
300
Which form of energy increases when a spring is compressed?
A. chemical potential energy
B. elastic potential energy
C. kinetic energy
D. radiant energy
E. thermal energy
B. Elastic Potential Energy
300
Which example best represents translational kinetic energy?
A. a plucked string on a guitar
B. the moving blades of a ceiling fan
C. a spinning top
D. a tuning fork struck on a rubber block
E. an apple falling from a tree
E. an apple falling from a tree
300
A tennis ball is hit into the air with a racket. When is the ball’s kinetic energy the greatest? Ignore air resistance.
A. when it leaves the racket
B. just before it reaches the ground
C. when it reaches its maximum height
D. when its kinetic energy and potential energy are equal
E. just before it starts falling downward
just before it reaches the ground
300
Provide at least one example of radiation
Heat radiating from sun
Heat given off stove
400
Which forms of energy does a hairdryer convert electric energy into? Provide at least one
Thermal
Motion
400
Which form of energy increases when a spring is compressed?
A. chemical potential energy
B. elastic potential energy
C. kinetic energy
D. radiant energy
E. thermal energy
B. elastic potential energy
400
What is the relationship between Kinetic Energy and an objects mass?
They increase proportionally to one another
400
Type the correct answer in the box. Round your answer to the nearest whole number. Dina has a mass of 50 kilograms and is waiting at the top of a ski slope that’s 5 meters high.
The maximum kinetic energy she can reach when she skis to the bottom of the slope is _______ joules.
Use PE = m × g × h and g = 9.8 m/s2. Ignore air resistance and friction.
2450 Joules
500
The image shows street lights powered by solar panels. Which sequence shows the energy transformations taking place in these lights?
A. gravitational potential energy → vibrational energy → chemical potential energy
B. radiant energy → chemical potential energy → motion energy
C. radiant energy → electric energy → radiant energy
D. sound energy → chemical potential energy → radiant energy
E. gravitational potential energy → motion energy → radiant energy
C. radiant energy → electric energy → radiant energy
500
When a pendulum is held high and then is released, the pendulum begins to swing. What’s the correct order of the energy transformations in this example? (PE stands for potential energy.)
A. gravitational PE → elastic PE → thermal energy
B. gravitational PE → kinetic energy → thermal energy
C. kinetic energy → elastic PE → thermal energy
D. kinetic energy → gravitational PE → thermal energy
E. thermal energy → gravitational PE → kinetic energy
B. gravitational PE → kinetic energy → thermal energy
500
Jeff has 10 grams of water and 10 grams of vegetable oil in separate containers. Both liquids have a temperature of 24°C. Jeff heats both liquids over a flame for five minutes. When he’s finished, he discovers that the temperature of the oil increased more than the temperature of the water. What can Jeff conclude from this experiment?
A. Vegetable oil is a better conductor of heat than water.
B. Water is a better conductor of heat than vegetable oil.
C. Vegetable oil has a higher heat capacity than water.
D. Vegetable oil has a lower heat capacity than water.
E. Vegetable oil is a good insulator.
Vegetable oil has a lower heat capacity than water.