Potential Energy
Potential energy is often called ________ energy.
Stored Energy
Kinetic energy is the energy of _______.
Motion
Conduction transfers heat through direct_______.
Contact
Convection moves heat through ________.
Liquids and Gases (fluids)
Radiation transfers heat through _______
Waves (electromagnetic waves)
A rock sitting on top of a hill has more potential energy than one at the bottom because of its ________.
Height (position)
What 2 factors affect how much kinetic energy an object has?
Mass and Speed (velocity)
Conduction happens best in what type of matter?
Solids, especially metals
Warm fluids rise because they are less ______.
Dense
Radiation does not need _________ to travel.
Matter
What kind of potential energy is stored in a stretched rubber band?
Elastic Potential Energy
Which has more kinetic energy: a bowling ball or a tennis ball rolling at the same speed?
The bowling ball
Why does a metal spoon in hot soup heat up?
Heat is conducted from the soup to the spoon's particles.
What do we call the cycle of warm fluid rising and cool fluid sinking?
Convection Currents
What type of radiation do we feel as heat from the sun?
Infrared radiation
True or False: The heavier an object is, the more gravitational potential energy it has at the same high.
True
Why does a moving car have more kinetic energy than than a bicycle moving at the same speed?
Because the car has more mass.
Give one example of conduction in everyday life.
Touching a hot stove.
Holding an ice cube.
etc.
Give an example of convection nature.
Wind, ocean currents, magma movement in Earth.
Why can you feel the heat of a campfire even if the air is cool?
Heat radiates as waves directly to your skin.
Give an example of potential energy changing into kinetic energy.
A roller coaster dropping from the top of a hill.
An apple falling from a tree.
etc.
Explain how a skateboarder at the bottom of a ramp shows kinetic energy.
The skateboarder is moving fastest at the bottom, so potential energy has changed to kinetic energy.
Why don't wooden spoons conduct heat as well as metal spoons?
Wood's particles are less tightly packed and it is an insulator.
Why is the upstairs of a house often warmer than the downstairs?
Warm air rises
Give one example of radiation besides the sun.
Light bulb, toaster, fire, etc.