Light Bulb Heat

Light bulbs are powered by electricity. This power is used to form light to brighten a room or area. When the light bulb has been lit for a while it might feel hot as you touch it. This is because only a small amount of that electricity that it uses is used for brightening the room. Only 2% of its energy is light energy and 98% is heat energy.

Examples Of Heat Transfer In Public!!!

Malls- The lights that light up the mall is radiation, heater that warms up the mall is also radiation, light decoration can be radiation, and if u touch a small light bulb, that is conduction.

Beach-The sun is radiation,touching hot sand is conduction.

Park- The smoke that comes up from the grill is radiation, the sun beating down on you is radiation too.

Restaurants- The smoke coming up to you when you order a food is radiation, when you touch a hot plate, it's conduction,and when you drink coffe, the smoke coming out is convection.

MOVIE!!! Lets look at the heat transfers in a theater!!

In this theater the lights radiate heat.
Not only is radiation happening, but convection is occurring to from the heaters.
Eating popcorn? Well believe it or not, but smelling the popcorn is convecting heat. Also the popcorn machine conducts heat from the pan to the corn kettles.
The hot dog machine also conducts heat by transferring heat from the rollers to the hot dog.

Examples of Heat Transfers

Conduction- Touching a hot stove, touching a hot item, touching a lightbulb, touching a ice sculpture will also transfer heat since everything with molecules give off heat, touching a hot item will also give off heat, Everything has heat!

Radiation- Microwave, computer, laptop, sun, lightbulb, oven, sun, fire, lights, ovens, microwaves, heat dishes, uv nail polish, and uv beads

Convection- air conditioner, water heater, beaches, pasta/noodles in h2O, sink, and gasoline in engine

Water heaters transfer heat through water.

Have anymore? Write them in a comment and we might add it!

Atoms and Molecules in Different Forms

Molecules and Atoms move around in different ways in various forms of matter. The faster the molecules move in the matter the more heat they give off.


Liquid- molecules are spread out and move freely

Gas Molecules- Most spread out and move around freely with no exact shape

Solid- Have a shape and do not move around freely

Plasma- move around and have no exact shape

Atoms and Molecules

Atoms and molecules make up everything! Atoms and molecules are spread out closer and further apart when in different forms. In a gas form molecules are spread out the most. In liquid the molecules and atoms are spread out closer, and move around freely. Solid has the most compact molecules and atoms making it their own shape. Atoms help make heat! The faster the molecules move around the more heat its going to give.

Heat Transfer

Heat could be transferred by many ways.

1. Radiation
2. Conduction
3. Convection

Radiation is heat being transferred by empty space. This transfer of heat is through no direct contact or the movement of the molecules and atoms.

Conduction is heat being transferred by the direct contact of the molecules and atoms. This heat transfer is given by solids creating contact with each other.

Convection is heat being transferred by the motion of gases and liquids. Warmer air tends to rise, and colder air tends to sink. Convection occurs in many places such as the Earth's atmosphere, in homes (heaters and air conditioners), and even on the beach!

Interesting Facts!

When a car is going down a highway at 60 mph. It gives off 20% of it's energy to motion energy, and 80% to heat energy!

Why is this???
Most cars are powered by gasoline. For many cars, they burn gas, which gives off 20% of it's energy to move the car forward or backwards. The rest of the energy given off by the gasoline is heat energy.

What is Heat???

Well all matter is made up of these small objects called atoms and molecules. When in different forms of matter these little objects move around at different speeds. When the molecules are moving faster the hotter the object gets... FASTER MOLECULES = MORE HEAT!!!

Heat is EVERYWHERE!!!!!!!