1. Chapter 3 Review Energy is the ability to do _________ Work
8th Grade Science
Work
Energy is the ability to do _________

2. The energy an object has because it is in motion.
Definition
Example
Kinetic
Kite in a tree
Fossil fuels, coal, oil, gasoline, match, food you eat
Visible light, electromagnetic spectrum
The energy an object has because it is in motion.
Running,
Moving Car
Potential
Stored energy that depends on the interaction of objects, particles, or atoms.
Energy that is stored in and released from the bonds between atoms
Chemical
Radiant
The energy carried by electromagnetic waves.

3. Energy Definition Thermal Sound Example Mechanical Heat Echolocation
Windmill,
Roller Coaster,
Car
Echolocation
The sum of KE and PE of the particles that make up an object.
Thermal
The sum of potential energy and kinetic energy in a system of objects.
Mechanical
Sound
The form of energy associated with the
vibration or disturbance
of matter.

4. Energy stored in and released from the nucleus of an atom.
Definition
Example
Nuclear
Fission,
Fusion,
Power Plant
Outlet
Earthquake
Energy stored in and released from the nucleus of an atom.
The energy that an electric current carries is a form of KE.
Electrical
The energy transferred by waves moving through the ground.
Seismic

5. How can you increase an object’s Kinetic Energy?
1. Increase Mass 2. Increase Velocity
A lit match produces which two types of energy?
Radiant Energy & Thermal Energy

6. State the Law of Conservation of Energy.
Energy cannot be created or destroyed by ordinary means. Energy can be transformed from one form to another.
Compare and contrast energy transfer and energy transformation.
Energy transfer is when energy travels from one object to another. Energy transformation is when energy is converted to another form.

7. Give an example of: Inclined Plane Lever Wheel & Axle
Joe lifts a bag of cement 2 meters above the floor, using a force of 125 N. How much work is being done on the bag of cement?
W = F x d
W = 125N x 2m
W=250 J
Give an example of:
Inclined Plane
Lever
Wheel & Axle
Ramp, Slide
Seesaw
Manual
Pencil Sharpener

8. Give four energy transformations that happen when lighting a match.
Sliding Match across box → Mechanical Energy
Tip of Match (Sulfur) → Chemical Energy
Spark → Radiant Energy
Fire → Thermal Energy

9. Draw a picture of a ball falling in the air. Label the points of G. P
Draw a picture of a ball falling in the air. Label the points of G.P.E. and K.E. Explain the transformation between kinetic and potential energy C
The ball has Kinetic Energy at points A & B. At Point C the energy is transformed into potential energy. Points D & E both have kinetic energy. Point C has the greatest Potential Energy & Point E has the most Kinetic Energy (right before the ball goes into his hand) B D E A

10. Organize all the forms of energy into the chart below.
Potential
Kinetic
Both KE + PE
Waves
Nuclear
Electric
Mechanical
Seismic
Chemical
Thermal
Radiant
Gravitational
Sound
Elastic