Energy

Energy is defined as the ability to do work or causes change. It is not found in many sources in nature.

• True

• False

Albert Einstein came up with the idea that under certain conditions matter could change directly into

• energy and energy could be changed into matter

• KInetic energy

Electromagnets are made from a coil of wire that’s attached to power supply

• True

• False

Thermal energy is the total

• kinetic and potential energy of the particles in a substance.

• kinetic energy and magnetic field

There are three types of transfer in the thermal energy:

Conduction

Convection

Radiation

• True

• False

Refraction

• Is the change in direction of light as it move from one material to another.

• Is the bouncing of light rays of a material's surface

Generator is a machine that converts kinetic energy into electrical energy

• True

• False

Renewable energy are

• Wind energy and electric energy

• Wind energy, hidroelectric energy and geothermal energy

• Wind energy, hidroelectric energy, geothermal energy and solar `power plants

Fossil fuels are renewables and not causes serious problems and pollution.

• True

• False

The magnetics field is strongest at a magnet’s poles

• True

• False