Burning wood is an example of using which type of energy?
Chemical energy
100
What is electrical energy
The energy of electric charges, can be kinetic or potential.
100
What energy transformations occur when you use a toaster to toast a piece of bread.
Electrical to thermal.
100
How are fossil fuels created?
EXTRA POINTS - DOUBLE!!!!!!!!!!!
Organisms die and for millions of years layers of many thick layers piled up on top of them and. The temperature and pressure cause them to turn into fossil fuels, like coal.
200
What is potential energy?
Potential energy is energy that is stored and has the potential to help you do work.
200
What type of energy is a photosynthetic organism obtaining from the sun?
EXTRA POINTS - DOUBLE!!!!!!!!!!!
Electromagnetic Energy
200
What is mechanical energy?
EXTRA POINTS - DOUBLE!!!!!!!!!!!
Energy associated with the position and motion of an object
200
What energy transformations occur when you turn on a match? Name at least 2
Chemical to mechanical - to help you move
Mechanical to thermal -creates friction, gets hot
Thermal to chemical - heat causes particles to release energy
Chemical to electromagnetic - creates light
200
How is the chemical energy that is stored within coal released.
It is released when coal is burned.
300
What two factors affect the total amount of gravitational potential energy?
Height and weight.
300
What is thermal energy?
EXTRA POINTS - DOUBLE!!!!!!!!!!!
The total amount of energy from particles in an object.
300
What is nuclear energy?
It is potential energy that is stored in the nucleus of an atom.
300
Name at least 1 energy transformation that occurs when you turn on a ceiling fan.
Electrical energy is transformed into mechanical energy, and thermal energy is created as well.
300
What are fossil fuels
Fuels that come from the remains of dead organisms, which had energy that came from the sun.
400
How can a rubber band create potential energy?
A rubber band creates potential energy because of its elasticity. If you stretch a rubber band and then release it, it has the potential to move other objects as it comes back to its non-stretched form.
400
Coal is burned to heat up water, and the steam from the water turns turbines to generate electricity. When steam is used, this is an example of what type of energy?
Thermal Energy
400
What is the formula for mechanical energy?
Mechanical energy = potential energy + kinetic energy
400
What does the law of conservation of matter state?
It states that energy cannot be created or destroyed.
400
Give 2 reasons for why it is not a good idea to continue to use fossil fuels as one of our main sources of energy
1. They create pollution
2. They will run out one day
500
A person that weighs 500 newtons will go skydiving. The person will jump from the plane at an altitude 5000 meters above ground level. What will be the person's potential energy right before the jump?
(hint: the answer will be in joules)
2,500,000 joules
500
Microwaves and x-rays are examples of which type of energy?
Electromagnetic Energy
500
Why is it that electrical energy can be kinetic or potential?
It can be potential because the charges can be stored, like in batteries, or they can be moving, like in electrical lines.
500
Name 3 energy transformations that occur when you rub your hands together.
Chemical - you eat food and it gives you energy to move
Mechanical - you move your hands
Thermal - you create heat from the movement of particles
in your hands
500
Explain 3 energy transformations that take place as fossil fuel is created. Start with the energy from the sun.
Nuclear to electromagnetic to chemical to thermal to mechanical to electrical to thermal, you need to explain