Download Energy ~Test Review

Name: ______________________________________________________
Period: ______
~Energy ~Test Review~
Using the Pendulum above describe the relationship of Kinetic and Potential Energy to answer
the following questions.
1. Describe what is happening at points A & E:
_________________most potential energy______________________________
2. Describe what is happening at point C:
___________most kinetic energy_______________________________
3. Describe what is happening at points B & D:
_______________potential and kinetic energy are equal______________________
4. Describe what happens to potential energy as the pendulum travels up:
_____It increases.______________________
5. Describe what happens to kinetic energy as the pendulum travels down:
______It increases.__________________________
6. What energy does the ball possess at point P?
F
only kinetic
G
only potential
H
both potential and kinetic
J
neither potential nor kinetic
7. A battery converts _______chemical___ ____energy__________ into electrical energy for
human use.
8. A hair dryer transforms electrical energy to which type of energy?
__________thermal________ _____energy_________
9. When a battery is used to light the flashlight, the energy transformations that occur are:
chemical energy → electrical energy →_____radient_energy_ (light)__________
10. A student conducts an investigation using a hot plate and beaker of water. Which
transformation of energy causes the water to increase in temperature?
____________thermal energy__________________________
11. A student uses a toaster oven to cook an after-school snack of pizza. What type of energy
transformation does the toaster oven utilize?
___________electrical________ energy ___________thermal________ energy
12. Sarah rubs her hands together quickly until they feel warm. What form of energy is she
using? _________mechanical energy____________________________
13. What form of energy is released or absorbed in MOST chemical reactions?
______________________thermal energy_________________________
14. Which type of energy transformation occurs when a match is lit?
______________chemical to radiant to thermal energy______________
15. Define insulation and give an example:
Prevents the transfer of heat
Example: rubber coating over electrical wires
16.
Define conduction and give an example:
Conduction travels from one particle to another and allows heat to move (vibrate).
Examples: Solids and Metals are good conductors. Water is also a conductor.
17.
Define radiation and give an example:
Radiation travels through empty space and in heat waves. It comes from the sun
without particles of matter.
Example: Heat waves seen coming from the road on a hot summer day.
X-Ray machines in a hospital.
18.
Define convection and give an example:
Convection is the way heat is transferred in liquids and gases. It is a cycle (like water
boiling)….Heat is rising and cool is sinking….It does not travel through solids.
Examples: Boiling water with rice in it.
Central heat in your house.
19.
What does the Law of Conservation of Energy state?
Energy cannot be created or destroyed, only transferred from one form to another.
The total amount of energy never changes.
20.
What are the 7 forms of energy with a BRIEF description of each
1. Mechanical – involves movement
2. Radiant – involves light and sun
3. Sound – vibration and mechanical waves
4. Chemical –stored in chemical bonds
5. Electrical – consists of a flow of electrical charges through a conductor
6. Nuclear – contained in the center or nucleus of an atom
7. Thermal – total kinetic energy contained in all particles of substance (heat energy)
21.
What is the acronym we came up with to remember the 7 forms??
Mrs. CENT
Energy Transformations
Directions: Describe what is happening during these energy transformations. Look at the example done
for you below.
1.
Sunlight shines on a solar cell. Start with the sun and end with what the solar cell produces. (You
HAVE to do the arrow/energy part but you do NOT have to explain it like I did. I just did that for you to understand my
thinking.)
nuclear energy
light energy
chemical energy
which reaches the solar
cell causing chemical
reactions
fusion in sun
produces light
electrical energy
which makes
electricity
2. A toaster is plugged into an outlet and is used to make toast. Start with the electricity.
Electric energy
radiant
thermal
3. Coal is burned in the furnace of a power plant. Start with the coal.
Chemical
thermal
electrical
4. A flashlight shines in the dark. Start with the batteries.
Chemical
electric
radiant
5. Wind creates electricity in a wind farm. Start with the wind.
Wind
mechanical
electrical
6. You are hammering a nail. Start with you.
Mechanical
thermal
7. Geothermal energy creates electricity.
thermal
Mechanical
electrical
8. A battery powered watch.
Chemical
mechanical
9. A kerosene lantern that has been turned on.
Chemical
heat(thermal)
light(radiant)
Key terms – make flashcards ! This is required and must be turned in for a grade.
Atomic/Nuclear energy –
Energy contained in the center or nucleus
of an atom
Chemical energy – energy stored in
chemical bonds (batteries, food )
Conduction – the transfer of heat from a
warmer substance to a cooler substance
through direct contact.
Conductor – Substance that conducts heat
readily; also a substance that allows an
electric current to pass through it.
Convection – transfer of thermal energy in
a fluid (liquid or gas), in which warmer fluid
rises and cooler fluid sinks in a convection
current
Electrical energy – consists of a flow of
electrical charges through a conductor
Energy – the ability to do work
Energy transformation – energy is
transformed from one form to another
Thermal - heat energy
Heat transfer – heat can be transferred 3 ways, through conduction , convection or radiation
Heat/Thermal energy – total kinetic energy contained in all particles of a substance
Insulator – a substance that does not transfer heat readily; also a substance that does not allow
and electrical current to pass through
Law of Conservation of Energy – Energy cannot be created or destroyed, only transferred from
one form to another. The total amount of energy never changes.
Light/Radiant energy – energy that involves like or sun and travels in waves
Mechanical energy – energy that involves movement
Sound energy – energy with vibrations or mechanical waves and can be heard by the ear
Temperature – measure of the average kinetic energy of particles in a substance; measured in
degrees Celsius(oC) or degrees Fahrenheit (oF)