Energy Conservation
The Law of Conservation of Energy tells us that energy is neither ______________________________________.
created nor destroyed
At what point does a roller coaster have the most kinetic energy?
At the bottom of the biggest hill
Does a rubber band have more elastic potential when stretched or not stretched ?
Stretched
What causes a wave to happen?
A disturbance
What is the difference between an energy transformation and energy transfer?
In a transformation, the energy form changes. In a transfer, the energy form stays the same, but the energy transfers to a new object.
What is the ability to do work or cause change?
What is energy
What kind of energy transformation takes place in a campfire?
Chemical energy is transformed into heat and light energy
What are two measurement changes that affect the gravitational potential energy?
Mass and Height
1.The type of wave created when the disturbance causing the wave vibrates perpendicular to the direction of energy travelling through the wave.
2.The type of wave created when the disturbance causing the wave vibrates parallel to the direction of energy travelling through the wave.
1. Transverse wave
2. Longitudinal wave
When there is a disturbance, such as a loud sound, the particles of matter do not move across the room. Instead, the energy transfers through _____________.
Since energy cannot be created or destroyed, it can only be _________ and ______________
transferred ; transformed
As something gets lifted higher off the ground, its _______ _______ increases
Potential Energy
A skydiver is an example of what type of energy transformation?
Gravitational potential ----> Kinetic
Waves that travel through a medium are called?
*** HINT **** (Guitar playing)
Mechanical Waves
Ocean waves are...
Sounds waves are...
Transverse
Longitudinal
1.) Potential energy changing to kinetic energy is an example of energy?
2.) Kinetic energy of one object hits another object and ___ its kinetic energy to it?
2. Energy transfer (transfers)
Tabitha ate a turkey sandwich and an apple for lunch. Later that day, she ran 2 miles during soccer practice. Which of the following energy transformations occurred between lunchtime and the end of Tabitha’s run?
Chemical energy was converted to mechanical energy.
A battery stores what type of potential energy?
Chemical potential energy
In a sound wave, the energy travels in the same direction that the particles vibrate. This is a _______________ wave.
Longitudinal
A coin is dropped in water?
What is the disturbance ?
What direction will the energy flow ?
What is the medium in this situation?
1. The coin dropping in the water
2. All direction (circular)
3. The water
Give two examples of systems where energy is conserved.
Roller Coaster
Food Web
Electrical Circuit
Photosynthesis
A roller coaster at the top of the tracks to the end of the ride has what changes in energy?
High Potential , Kinetic ~0 ------> Kinetic increase, Potential decrease
In the beginning of our unit, we completed a laboratory demonstration.
The water in the container with a wooden block and ping pong ball.
Which type of waves were these?
Transverse
Describe the type of wave that is present when you do "the wave" at a sporting event
A transverse wave - the people are moving up and down, but the wave travels sideways across the stadium (perpendicular)