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Name: _______________________
Wish
Science ____
Date: ________________________
Energy
Lesson 1: What are some forms of energy? (pgs. 638-647)
Key Terms: energy, potential energy, kinetic energy, law of conservation of energy
I. Potential and Kinetic Energy
1. Energy is the ability to cause changes_______ in ___matter______.
2. Potential energy is energy_______ that is due to the _position___ or
__condition__________ of an object.
3. Kinetic energy is the _energy_________ of __motion_______.
4. The amount of potential energy an object has depends on its
_position_____ and how _massive____ it is.
5. Energy has different _forms__________.
II. Energy Transformations
1. One form of __energy__________ can be __transformed___into many
other forms of energy.
III. Law of Conservation of Energy
1. The law_______of conservation___ of energy states that the total
amount of _energy____________ in a system is always the
same________.
2. Energy cannot be _created__________ or _destroyed________.
Name: ______________________
Wish
Science _____
Date: _______________________
Chapter 14: Energy
Lesson 1: What are Some Forms of Energy?(pp638-647)
Directions: After completing the reading, read each question below carefully
and answer in complete sentences, unless otherwise indicated. Be sure to state
the original question in your response.
For example: Q: What tools might you use to investigate liquids?
A: When I investigate liquids the tools I use might include a
graduated cylinder, a beaker or a measuring cup.
1. Looking at the picture on page 642, what objects shown have potential
energy and which objects have kinetic energy?
Potential Energy
 The skier
 Snow at the top of mt.
Kinetic Energy
~the moving skier
~the moving snow
2. What is energy? What is the difference between potential and kinetic
energy? Energy is the ability to cause change in matter. Potential energy is the
energy an object has because of its position or condition. Kinetic energy is the
energy of motion.
3. Study the picture of the skier on the mountain on page 642.
What kinds of energy would the skier have if he were exactly halfway down the
hill? Why? 50% kinetic and 50% potential. Half of his potential energy would
have changed to kinetic energy as he/she moved (skied)
Now look at the mass of snow at the bottom of the mountain on this page.
What can you infer by looking at the photo? Would the skier or the snow have
had more total energy? The snow would have had more total energy because it
had more mass. This is proved because of the amount of destruction to the village
at the bottom of the mountain.
4. What are some forms of energy? Thermal, light, sound, chemical, and
electrical.
___________________________________________________________
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5. What forms of energy are involved when you turn on an iron? When you turn
on a flashlight? When you turn on an iron there is electrical energy and thermal
energy. When you turn on a flashlight there is chemical energy, electrical
energy and light energy.
___________________________________________________________
___________________________________________________________
___________________________________________________________
6. Look at the picture on pgs 636 & 637. Where does the energy produced by
the dam come from? _The energy is produced in the stored potential energy of
the water behind the dam.
________________________________________________________
________________________________________________________
________________________________________________________
7. What kind of energy changes take place as the rocket moves from the
ground to its highest point? Chemical potential energy changes to the kinetic
energy of the rocket. As the rocket goes higher, its kinetic energy changes to
potential energy
_________________________________________________________
_________________________________________________________
_________________________________________________________
8. Compare and contrast the transformation of chemical energy in the
fireworks and the flashlight. In both the fireworks and flashlight, some of
the chemical energy produces light. The fireworks produce light directly from a
chemical change. In the flashlight, the chemical energy changes to electricity
and then to light. The chemical energy in the fireworks transforms into other
forms of energy in one quick burst. The chemical energy in the flashlight
changes slowly over a long period.
9. How would you describe the energy in an unlighted match? An unlighted
match has potential chemical energy.
How would you describe the energy in a lighted match? A lighted match has
kinetic light and thermal energy. Its potential energy is decreasing until the match
goes out.
___________________________________________________________
___________________________________________________________
10. What are three forms of energy that can be changed into electrical energy?
Chemical, nuclear and solar. _______________________
___________________________________________________________
___________________________________________________________
11. What are the signs of energy in the photograph on page 646? light_____
____________________________________________________________
____________________________________________________________
____________________________________________________________
Where is the energy after the lightning disappears? It moved into the air, the
Earth or whatever the lightning hit.
____________________________________________________________
____________________________________________________________
12. State the Law of Conservation of Energy. The law states the total amount
of energy in a system is always the same-energy cannot be created or
destroyed.
__________________________________________________________
13. What is the most important idea of the Law of Conservation of Energy? ___
_Energy cannot be created or destroyed. The total amount of energy in a
system stays the same.
____________________________________________________________
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