In this topic you will learn about how to measure matter.

Matter is anything that has mass and takes up space. The properties of matter can be measured. Mass is a measure of the amount of matter in an object. Known masses are placed on one side until they balance the unknown mass. Mass is often reported in kilograms.

How much space an object takes up is volume. Volumes are often reported in cubic centimeters.

Weight (on Earth) is a measure of the force of gravity between Earth and an object. An object's weight depends on its location in the universe.

If we divide the mass of a sample of material by its volume, we get a measure called density. As more matter gets packed into the same amount of space, the material's density increases. When a material's density is greater than water's density, the material will sink in water.

Any liquid such as water will push up on an object that is placed in it. The upward push on an object by the liquid (or gas) the object is placed in is called buoyancy. If the upward push is strong enough compared to the object's weight, the object will float.

Matter has many other properties. For example, some materials conduct heat very well. To conduct means to allow heat or electricity to flow through readily. Other materials insulate. A material that will insulate does not allow heat or electricity to flow through readily.

Certain objects push or pull on each other because they are magnetic. A magnet has a north and a south pole. Magnets can also attract certain materials that are made of iron metal. Like density, magnetism results from the combined effect of the properties of tiny particles.

You may use many properties of matter every day. Matter that conducts electricity lets you read or listen to a CD. Buoyancy allows you to float in swim class. Magnets help you find your way with a compass.