What is Energy?
What is the definition of energy?
Energy is the ability to do work
What is mechanical energy? Give one example.
When a force acts on an object to make it move. Example: a car, bike, bus, ect.
What is radiant energy?
Radiant energy travels in electromagnetic waves and can even travel through space.
What is renewable energy?
Potential and kinetic energy
What is thermal energy? Give one example.
It is created by the movement of particles inside an object. The faster they move, the hotter the object. Example: boiled water.
What are some examples of radiant energy?
Sun, x-rays, gamma rays, microwaves, and radio waves.
Give one example of renewable energy.
Water.
How is energy used by the body?
Breathing, digesting, moving, thinking
Does ice cream produce thermal energy?
Yes, particles are moving, they are just slower and has less thermal energy than something hot.
Electricity is created by forcing electrons to move from atom to atom through a conductor.
What is non-renewable energy?
Energy that cannot be used more than once.
What kinds of energy does the sun produce?
Light (radiant) and heat energy
What are the 3 parts of thermal energy? Provide definitions.
Conduction: the movement of heat by direct contact.
Convection: the movement of heat by the circulation of a liquid or gas.
Radiation: the movement of heat energy through electromagnetic waves.
What is nuclear energy?
It is energy that is stored in the nucleus of an atom. It can only be used when fission or fusion occurs.
Give one example of non-renewable energy.
Fossil fuels.
Why do you think the industrial sector consumes the most energy?
Big machinery is used in industries and they burn a lot of fossil fuels to do work.
Energy cannot be created nor destroyed. It can only be converted from one form of energy to another. Example: Chemical energy from the log can be converted into light and thermal energy when set on fire.
What is chemical energy? Give one example.
It is potential energy, which is converted into other forms. Example: Wood
What is climate change?
The average change in temperature due to the burning of fossil fuels creating a heat blanket over the Earth.