# 5 Physical Properties

## Heat!

Heat is one of the forms of energy that we can feel. It's hot! Heat is transferred by a change in temperature. When fire burns, heat comes off it. Heat makes the thermometer go up! :-) Most heat on our Earth comes from the Sun, which is a star, otherwise known as a giant ball of fire, so again with the fire creating heat.

## Conductors!

I know 4 types of conductors. These, you probably know: a music conductor in a concert and a train conductor. I'm talking about the other 2: heat conductors and electricity conductors. A heat conductor can have heat flow through it easily. It's the same for an electricity conductor. An example for a heat conductor is a wire made from copper, gold, or aluminum.

A nice bracelet but a better conductor!

## Mass!

Mass is the amount of matter in an object. Matter is what everything that takes up space is made of. The more mass an object has, the heavier it is. A golf ball has less mass then a ten-pound weight!

A scale (above) is used to measure mass or weight.

## Insulators!

An insulator is something that can keep heat well. It's also not a very good conductor of heat. An example of an insulator is a thick, warm, wooly jacket. It keeps the heat inside of it for you! Your house most likely has white/pink stuff in the walls to keep the heat inside. An insulator!

a warm insulator for winter!

## Buoyancy!

Buoyancy is the upward push of water on an object less dense then it! Water will push up on things that aren't too heavy. A big stone will most likely be too dense and sink! That's why sometimes objects float!