Where Does Energy Come From & What Types Of Energy Are There

Where Does Energy Come From & What Types Of Energy Are There

Where Does Our Energy Come From?

All of our energy comes from the sun, which is our nearest star. The sun sends out huge amounts of energy through its rays every day. We call this energy solar energy or radiant energy. Without the sun, life on earth would not exist, since our planet would be totally frozen.

Multiple Choice

Where does the energy on Earth come from?

• The Earth's Core

• All the stars in space

• Solar winds

• The Sun

What is Energy?

Energy is the ability to do work.

What Types/Forms of Energy Are There

• Heat

• Radiant/Light

• Mechanical/Motion

• Electrical

• Chemical

• Gravitational

Mechanical

Related to the movement of objects or its position in gravity

Sound

Relates to the repetitive compression (squeezing) and rarefaction (letting out) of molecules in a substance (solid, liquid, gas)

Chemical

Related to the potential energy stored in the bonds between atoms in a compound; results from chemical reactions between atoms or molecules

Radiant/Light

Radiant energy, also known as electromagnetic radiation (EMR).  This is the energy found in electromagnetic waves, also known as light.

Electrical

Related to the movement or flow of electrons which carry a charge

Thermal/Heat

Related to the motion of atoms or molecules in a substance

Nuclear

Related to the potential energy stored in bonds between particles in the nucleus of an atom

Gravitational

Involves the attraction between two objects based on their mass. It can serve as a basis for the mechanical energy of an object placed on a shelf or the kinetic energy of the Moon in orbit around the Earth.

Multiple Select

What is energy?

• The ability to do work

• Light

• Heat

• Metals

These forms of energy can be grouped into two general types of energy for doing work:

• Potential or stored energy

• Kinetic or working energy

Potential

The energy of an object’s position.

Kinetic

The energy of motion of a body. It ranges from zero to a positive value.

Multiple Choice

Kinetic energy is the energy of motion

• True

• False

The Law of Conservation of Energy

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

Multiple Select

Energy

• cannot be created

• cannot be destroyed

• can be transformed into other types of energy