Mass is the amount of matter an object takes up. You can measure mass by using a balance.
Magnetism is when the north and south poles will attract and will cause some metals to attract all so.
Heat is a source of energy when the molecules move very fast and can be measured by a thermometer.
Density is how tightly packed the matter is.If the matter is more dense than the water it will sink and if the matter is less dense it will float.
A conductor is a substance that will let heat or electricity go through easily.
Insulators do not let heat or electricity go through easily.