Types of Energy
What type of energy is also known as heat?
thermal energy
Friction often generates thermal energy. What is an example of friction?
rubbing your hands together... etc.
Electric pencil sharpener
electric ---> kinetic
What is the chemical formula for water? bonus if you can draw it
H2O
What energy transformation takes place when a radio is plugged in and turned on?
electric to sound
Define potential energy
stored energy that has not been used
Does thermal energy move from a hotter object to a colder one, or from colder to hotter?
HOT TO COLD
Gas powered car
Chemical ---> kinetic
What is the law of conservation of energy?
Energy cannot be created or destroyed.
Objects of different masses are suspended from a height. Which combination of mass and height will have the greatest gravitational potential energy?
highest mass (heaviest)
highest height (tallest)
Name three types of energy in a fire
chemical
thermal
light
sound
kinetic
What is the definition of conduction? Write the definition and draw an example.
The transfer of heat through direct contact.
Cooking pancakes on a pan.
Battery
Chemical ----> electric
What does the word "transfer" mean?
when energy MOVES from one place to another
One way a solar oven works is by transferring energy from the sun to:
a. thermal energy in water or food
b. electrical energy in an oven
c. chemical energy in water or food
d. light energy in the oven
a. thermal energy in water or food
What type of energy reacts in the sun and produces light and heat?
nuclear energy
What is the definition of convection? Write the definition and draw an example.
The transfer of heat by particles moving due to differences in density.
lava lamp
Elastic ----> kinetic
Can you find something in the room that would be good at Transmitting light? Describe it.
answers vary
On a summer day, asphalt is hot on your bare feet because the asphalt has ______ thermal energy from the sun.
a. absorbed
b. transmitted
c. reflected
d. scattered
a. absorbed
what type of energy do you find in a rubber band? (be specific - there are two answers)
potential
elastic
What is the definition of radiation? Write the definition and draw an example.
The transfer of heat with no direct contact.
heat from the sun or a fire
Waterfall
GPE ---> kinetic
Can you find something in the room that would be good at reflecting light? Describe it.
Answers Vary
A steel fork and a plastic spoon are both the same temperature. The fork feels colder when you touch it. This is because:
a. the fork is bigger than the spoon
b. steel conducts thermal energy better than plastic
c. steel contains more thermal energy than plastic
d. plastic loses more thermal energy than steel
b. steel conducts thermal energy better than plastic