Types of Energy
An object has this type of energy because of its position above the Earth's surface.
Gravitational Energy
_____ Energy from a moving turbine at the Hoover Dam then turns into _____ Energy that powers Las Vegas.
Mechanical and Electrical
At the top of a hill, a roller coaster car has mostly what type of energy?
Potential Energy
DOUBLE POINTS IF ANSWERED:
Gravitational Potential Energy (GPE)
Energy stored in food or gasoline is what type of energy?
Chemical energy
Where does the Kinetic Energy from your foot go when it kicks a soccer ball?
Into the soccer ball
This type of energy is found in Hot Cheetos.
Chemical Energy
The _____ Energy in the food you eat transforms into Kinetic Energy, _____ Energy, and stored Chemical Energy.
Chemical and Thermal
As the roller coaster car speeds down the hill, its potential energy is transformed into what type of energy?
Kinetic Energy
Energy caused by moving electrons is called what?
Electrical energy
Emma is heating three pots of water on the stove. Each pot is the same size, made of the same materials, and is set to the same heating level. Each pot has a different amount of water.
Which pot of water will take the least amount of energy to bring to a boil?
The pot with the least amount of water
This type of energy is found in moving objects.
Kinetic Energy
*DAILY DOUBLE*
What is the one input energy and the two output energies of my laptop?
Input = Electrical Energy
Output = Thermal (heat) Energy and Radiant (light) Energy
A roller coaster starts with 1,200 J of potential energy. At the bottom of the hill, it has 1,050 J of kinetic energy. Where did the missing 150 J go?
It was transformed into heat and sound energy from friction.
When you rub your hands together and feel them get warm, what energy transformation has occurred?
Mechanical energy → Thermal energy
A ball has 20 J of potential energy at the top of a hill. When it reaches the bottom, it has 20 J of kinetic energy.
What does this show about the total energy of the system?
Energy is conserved — the total energy stayed the same, but it changed form from potential to kinetic.
An incandescent light bulb gives off both _____ and _____ energy when it is on.
Heat and Light (electromagnetic)
Only about 12% - 30% of the chemical energy from gasoline is used to move a car down the road.
Most of the remaining energy (58%-62%) is lost as _____ energy.
Thermal (heat) Energy
Halfway down the hill, the roller coaster has 500 J of kinetic energy. If no energy is lost to friction, how much potential energy does it still have?
500 J (Total energy stays the same — half kinetic, half potential.)
A glow stick lights up when bent. What two energy transformations are happening?
Chemical energy → Light energy (and a little heat energy)
What does the term “conservation” mean in regards to energy?
Energy is not created or destroyed, the same amount is always present in some form
Whales use this type of energy to communicate with each other.
Sound Energy
Friction between two surfaces causes _____ energy to transform into _____ energy.
Kinetic and Thermal
Explain how energy is conserved throughout a roller coaster ride from start to finish.
Total mechanical energy stays the same, transforming back and forth between kinetic and potential minus loss from thermal energy
Which two forms of energy are combined to make mechanical energy?
Kinetic energy and potential energy
A student is holding a pumpkin at a height of 2 meters. The pumpkin has 50 joules of potential energy and 0 joules of kinetic energy.
The pumpkin is released from that height. How much potential and kinetic energy does the pumpkin have right before it hits the ground?
50 joules of Kinetic Energy and 0 joules of Potential Energy