Energy & Heat Transfer

Energy is the ability to create change in a system.

There are four main types of energy:

SolarMotionHeightHeat

Solar Energy

Energy released by the sunThe sun is the main source of all energy on Earth.

Kinetic Energy

Kinetic energy is also called motion energy. Kinetic energy is energy from motion

Potential Energy

Potential energy is also called height energy. Potential energy is energy that is stored.

An example is rolling a boulder down a hill

Heat Energy

Heat energy is the energy that heat produces and allows heat to move from warmer objects to cooler objects.

Heat energy is to blame when you burn your finger on a hot dinner plate. The heat from the plate moves to your cool hand. OUCH!

FrictionHeat energy that is released when two objects rub together.

The more friction between objects, the more energy that builds up.

Heat Transfer

Without our sun, there would be no heat. Without heat from the sun there would be no energy.

Heat and energy are connected to one another.

Heat transfer is energy transferred from a hotter object to a cooler one.

The 3 types of heat transfer

Conduction

Convection

Radiation

Conduction

Conduction is the direct transfer of heat from one substance to another.

When it is too hot to walk on the beach barefoot, it is because of conduction.

Convection

Convection is the transfer of heat by the movement of a fluid

***Convection moves in a circular motion***

Convection is responsible for evaporation

Radiation

Radiation is the direct transfer of energy by electromagnetic waves

An example is how the sun heats the Earth.

Conduction, Convection, Radiation

Label & define: Conduction, Convection

& Radiation

States of MatterSolid: Particles are tightly packed. Particles in a solid can vibrate, but cannot move past one another. Solids retain their shapes.

Liquid: Particles in a liquid are close together with no regular pattern. Particles in a liquid can flow past one another. Particles in a liquid take on the shape of their container.

Gas: Particles in a gas are separated with no regular shape. Particles in a gas vibrate and move freely at high speeds. Gases take on the shape of their containers.