Potential vs. Kinetic
Conservation of Energy
Wave Facts
Comparing Waves
Conduction, Convection, and Radiation
100
Energy of movement
What is kinetic energy
100
Does eating food create energy?
No, energy cannot be created.
100
This is a disturbance caused by a vibration that transfers energy from one place to another.
What is a wave?
100
This is the measurement of the height of a wave (from resting point to trough)
What is amplitude?
100
What are the three ways that thermal energy can be transferred?
What are conduction, radiation, and convection?
200
Stored energy
What is potential energy
200
When an animal dies, is their energy destroyed?
No, energy cannot be destroyed
200
The vibrations of a longitudinal wave move...
A. at right angles to the direction of wave travel
B. in the same direction as the wave travels
C. above and below the moving wave
What is B, in the same direction as the wave travels (parallel)
200
This is the measurement of the width of a wave (the distance from crest to crest or compression to compression)
What is wavelength?
200
Jesiah hold a pan of water over a fire until the water starts to boil
Which process is indicated by the letter Y?
What is conduction?
300
The type of energy we can detect with our ears
What is sound energy?
300
Which of the following best describes what happens when energy is transferred from one system to another?
a. The energy changes into mass.
b. Some energy is created or destroyed
c. The energy changes form
What is c, the energy changes form.
300
The vibrations of a transverse wave move...
A. at right angles to the direction of wave travel
B. in the same direction as the wave travels
C. above and below the moving wave
What is A, at right angles to the direction of wave travel (perpendicular)
300
Four waves are shown below.
Compared to wave A, which wave has a shorter amplitude but the same wavelength?
What is wave D?
300
Jesiah hold a pan of water over a fire until the water starts to boil
Which process is indicated by the letter X?
What is convection?
400
The type of stored energy that comes from an objects distance from the ground
What is gravitational potential energy?
400
How often does the total amount of energy in the universe change?
Never, because energy cannot be created or destroyed.
400
Do mechanical waves move faster in air or in water? Explain.
Mechanical waves move faster in water because the particles in water are closer together (more dense). Since mechanical waves need particles to pass the energy along, closer together particles means the energy gets passed along faster.
400
Four waves are shown below.
Compared to wave A, which wave has a shorter wavelength but the same amplitude?
What is wave C?
400
Jesiah hold a pan of water over a fire until the water starts to boil
Which process is indicated by the letter Z?
What is radiation?
500
What is the relationship between potential and kinetic energy?
As on goes up, the other goes down, always staying in balance.
500
Define the law of conservation of energy.
Energy cannot be created or destroyed, just transformed and transferred.
500
Do electromagnetic wave move faster in air or in water? Explain.
Electromagnetic waves move faster in air because the particles in air are more spaced out (less dense) than in water. Since electromagnetic waves don't need matter to travel, the more spaced out particles in air allow the electromagnetic wave to pass through faster.
500
The graph below shows the speeds of three waves in air and water.
Which wave (or waves) are electromagnetic?
What are wave I and III because they moved faster in air than in water.
500
The picture below shows a representation of atmospheric currents on Earth. As the sun heats the air closest to the surface, that air rises into the upper atmosphere. Once there, the air cools and sinks back towards the surface. The process cycles and forms a convection current.
At what point would you expect the air to be LEAST dense? Explain.
Claim: The air is warmest at point B.
Evidence: - Point B is near the top of convection current
- Point B is on the rising side of current
- Sun is heating air close to surface
Reasoning: Since warm air is rising and point B is near the top of the rising side, that is where the warmest air would be. Since things that are less dense float above more dense substance, the warm air must be less dense. Therefore the least dense air would be at point B.