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Transcript
Name_____________________ Period______
Test: Thursday, Dec. 5th
Science Test Review KEY!!! : Forms of Energy
Review Sheet due at the beginning of the class period Tuesday, Dec. 3rd
1. Define Energy: the ability to do work or cause change
2. Two Main Types of Energy are potential energy______and____kinetic energy
3. Define Potential Energy stored energy due to position or arrangement of particles
4. In the diagram to the right, at which point does the sled have the greatest potential
energy? ______A_______
5. Define Kinetic Energy: energy of motion
6. The amount of Kinetic energy a moving object has depends on its_mass_____and
_velocity___________.
7. In each of the following pairs, CIRCLE which would have more kinetic energy rolling down a hill:
A marble or a boulder
A beach ball or bowling ball
A Toy car or a Hummer
Explain why you chose the ones you chose?they all have the greater mass
8. In the diagrams below, identify the greatest Kinetic and greatest potential energy
P
P
P
P
K
K
P
K
K
9. What is pictured to the left? pendulum
10. At which point does the pendulum have the most potential energy? A&E
11. At which point does the pendulum have the most kinetic energy? C
A
B
C
D
12. At which points on the pendulum are the kinetic and potential energy equal ?
B & D and A & E
E 13. If you place a block at point C, what would happen to the block?
It would be moved
Why? The pendulum has kinetic energy which would be transferred to block as
motion energy
Define the Forms of Potential Energy:
14. Chemical Energy: energy stored in the bonds of atoms and molecules
Example: biomass, petroleum (gasoline), natural gas
15. Nuclear Energy: energy stored in the nucleus of an atom
Example: the sun (fusion), nuclear (fission) in power plants
List two ways nuclear energy is produced: fusion and fission
16. Gravitational Potential Energy: potential energy due to position or place (elevation)
Example: cat on a fridge
17. Stored Mechanical: energy stored in objects by application of force
Example: compressed spring, rubber band wind-up toy made in class
Define the Forms of Kinetic Energy:
18. Radiant Energy: is electromagnetic energy that
travels in transverse waves.
Example: x rays, sun light
List the different forms of Radiant Energy gamma rays & x-rays, UV rays, visible light, infrared,
microwaves, radiowaves (GUVIMR)
19. Thermal Energy: heat energy
Example: geothermal heat
20. Motion or Mechanical Energy: is the movement of objects and substances
from one place to another.
Example: bike riding
21. Sound Energy: is the movement of energy through
substances in longitudinal waves
Example: guitar string plucked
22. Electrical Energy: the movement of electrons
Example: electricity
23. Energy of microwaves, radio waves, x-rays, ultraviolet rays, and light waves are
all forms of _ electromagnetic _energy (or radiant)
Energy Transformations (Conversions)
24. Define Energy transformation: begins with one energy and produces another type of energy
25. What does the law of conservation of energy state? The law of conservation of energy says that energy
is neither created nor destroyed.
Give an example: chemical energy transforming into motion/mechanical energy and also producing heat
and sound energy
26. In every energy conversion, some energy is always converted into thermal (heat) energy.,
due to friction.
27. What is the energy transformation for a resource to produce electricity?
Flashlight:
__chemical__________
electrical
_______thermal______
_radiant____________
(battery)
(electricity)
(resistor creates heat)
(Light)
28. Using number 27, diagram the energy transformations that occur in the following:
Hot Plate
electrical  thermal
Windmill
motion /mechanical  electrical or mechanical
Toaster
electrical  thermal
Gas Stove
Car Engine
chemical thermal
chemical  mechanical/sound/thermal
Hair Dryer electrical  thermal/motion
29. chemical_______________energy in the sugars and starches of food fuels all your body functions
and movements, and provides the thermal energy that keeps your body temperature constant.
Heat/Thermal Energy Transfer
DEFINE:
30. convection- heat transfer through fluids (liquids) and gases
31. conduction- heat transfer by particles touching
32. radiation- heat transfer through electromagnetic waves (example: sun’s light and heat)
33. Identify the following examples as convection, conduction or radiation:
Ice in a soft drink melts due to ____conduction & convection____________________
Boiling an egg in water __ convection______________________________________
A pot touching a hot stove ___conduction_____________________
A small heater heating a bathroom ___convection__________________
A cold blooded reptile warming itself from the sun ___radiation__________________
34. Explain how heat moves through liquids during convection. Hot liquids
circulate and rise to top as cold liquids circulate and sink to bottom—and this
process repeats in a circular-type fashion.
~Draw a picture showing this.