Transcript ENERGY

ENERGY
Energy is the ability to cause
change
WHAT IS LIGHT
ENERGY?
WHAT IS THERMAL
ENERGY?
5 POINTS
5 POINTS
WHAT IS CHEMICAL
ENERGY?
WHAT IS ELECTRICAL
ENERGY?
5 POINTS
5 POINTS
ANSWERS
Light Energy – radiant
energy. Travels at a
speed of 300,000 km/s
Thermal Energy –
energy due to molecular
movement within an
object. Increased
temperature = increased
thermal energy
Chemical Energy –
Electrical Energy –
energy stored in chemical
energy of electrons
bonds. When chemicals are moving along a path
broken apart and new
(electrical current)
molecules are formed,
energy is released
Energy is the ability to cause
change
WHAT IS NUCLEAR
ENERGY?
WHAT IS POTENTIAL
ENERGY?
5 POINTS
5 POINTS
WHAT IS KINETIC
ENERGY?
HOW IS NUCLEAR
ENERGY RELEASED?
5 POINTS
5 POINTS
ANSWERS
Nuclear Energy –
energy stored in the
nucleus of an atom
Potential Energy –
energy an object has
because of its position
Kinetic Energy –
Nuclear Fission – as
energy of a motion. Only soon as the nucleus splits into
2 lighter atoms and throws off
a moving object has
2-3 new neutrons. The 2 new
kinetic energy. Amount
neutrons then emit gamma
radiation and the ejected
of energy depends on
neutrons hit other uranium
speed and mass
nuclei causing a chain reaction
Energy is the ability to cause
change
HOW DO ENERGY
TRANSFORMATIONS
OCCUR?
HOW DOES MASS
AND SPEED OF AN
OBJECT RELATE TO
KINETIC ENERGY?
10 POINTS
10 POINTS
ANSWERS
The amount of kinetic
energy also depends on the
mass and the speed of an
object.
Energy transformations occur in
Kinetic energy increases as
energy production (as in
conversions of energy for use in speed increases.
The faster an object
everyday life).
moves, the more kinetic
energy it has.
Potential Energy is the energy
An energy transformation
occurs when energy changes
from one form to another.
that is stored because of an
object’s position.
The energy of an object due to
its motion is called Kinetic
Energy.
Windmill farms are becoming a popular method of
generating electricity for some communities. What
form of energy in wind is used to turn the giant
blades of the windmill?
A. Chemical
B. Mechanical
C. Electrical
D. Thermal
20 POINTS
The correct answer is B, Mechanical Energy.
Wind, which turns the windmill blades, is the
movement of air particles.
In a nuclear reactor, the energy used to turn
water into steam is in what form?
A. Chemical
B. Nuclear
C. Electrical
D. Thermal
20 POINTS
The correct answer is “D”, thermal energy.
The nucleus of the uranium atom contains
nuclear energy, but this is converted into
thermal energy when the nucleus is split.
The thermal energy is then used to heat the
water to the boiling point.
Nutrients entering muscle cells in the body are converted into
heat. What form of energy is stored in the nutrients?
A. Chemical
B. Nuclear
C. Electrical
D. Thermal
20 POINTS
The correct answer is “A”, chemical
energy. Chemical energy is stored
in the chemical bonds of the food
molecules.
QUESTION
The boulder would have the greatest kinetic energy at which of
the positions on the waterfall?
A position 1
A 1
B position 2
C position 3
4
2
D position 4
3
B
20 POINTS
B
position 2
A yo-yo can demonstrate both Potential and
Kinetic energy.
When does a yo-yo have it greatest potential
energy?
A In the hand before the yo-yo
is released
B At the bottom of the string
C When the yo-yo is falling
D When the yo-yo is climbing
the string
20 POINTS
A
In the hand before the yo-yo is released.
Which will have the most kinetic energy
rolling down the hill?
A Truck
B Ball
C Runner
D All of the are examples of Potential
energy.
20 POINTS
Answer: A
Which of the following can be used to transform
chemical energy into heat energy?
A.
B.
melting a candle
lighting a match
C.
solar panels
D. a light bulb
20 POINTS
Answer: B
Which of these types of energy conversions
occurs in a battery-powered flashlight?
A. Thermal to mechanical
B. Light to electrical
C. Thermal to chemical
D. Chemical to electrical
20 POINTS
Answer: D