Download What is energy? - Effingham County Schools

WEEK 13
SKIP A PAGE IN YOUR CRCT NOTEBOOK
1. What is energy?
a.
b.
c.
d.
A feeling of power
The ability to cause change
A change in the amount of motion
Anything that flows out of one
thing into another
2. What happens in an energy
transformation?
a. The Sun creates energy
b. Energy causes a physical object to
move
c. One form of energy changes into
another form of energy
d. Some energy is permanently used
up
3. When energy is converted from
one form to another, what is usually
produced?
a. heat
b. chemical energy
c. electromagnetism
d. gravity
4. The law of conservation of energy
states that
a. we should conserve energy resources
whenever possible.
b. energy conserves power in closed
systems.
c. the energy that reaches Earth is
mostly absorbed by the surface.
d. energy is neither created or
destroyed, it can just be transformed
(change forms).
5. The joule is a unit for measuring energy.
According to the law of conservation of energy,
if 30 joules of EM energy is converted to sound
and heat, how much of the energy will be
permanently lost?
a. all 30 joules.
b. about half-15 joules
c. it depends on the efficiency of the
transformation
d. none of the energy
6.The amount of energy an object
has it related to its
a.
b.
c.
d.
temperature.
mass.
velocity.
distance.
7. Potential energy, either from
position or chemical composition, is
a.
b.
c.
d.
concentrated
small compared to kinetic energy
stored.
quickly used up.
8. Kinetic energy increases with
increasing
a.
b.
c.
d.
chemical reactions.
distance.
volume.
speed.
9. A ballet dancer balances on one pointed toe
shoes. What is the relationship of potential
and kinetic energy in the ballerina?
a. The are available in equal quantities.
b. The dancer has more potential energy
than kinetic energy at this moment.
c. The dancer has more kinetic energy
than potential energy at this moment.
d. Kinetic energy can be released and
transformed into potential energy
immediately.
10. Most cars have internal combustion
engines. In these engines, a spark ignites fuel,
and the resulting reaction forces pistons to
move. The fuel in the car has
a. potential energy due to gravity.
b. kinetic energy due to chemical
composition.
c. potential energy due to chemical
composition.
d. kinetic energy due to gravity.