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| Mass. | is the amount of matter in an object. |
| Physical property.Figure 1. | is any characteristic of a material that can be observed or measured without changing the identity of the material.Never taste,touch,or smell any of the materials being used in the lab. |
| Matter. | Every thing that you can see,touch,smell,or taste,has mass,and takes up space. |
| Physical change. | is the change in which the physical properties of a substance change but the identity of the substance always remains the same. |
| Density. | is another measurable physical property that can be found by dividing the mass of an object by its volume. |
| States of matter. | the four states of matter are solid,liquid,gas,and plasma.The state of matter of a substance depends on its temperature and pressure. |
| Melting point. | he temperature at which a solid becomes a liquid is its melting point.The melting point of a pure substance does not change with the amount of the substance. |
| Boiling point. | is the temperature at which a substance in a liquid state becomes a gas. |
| Chemical property.Figure 12. | is any characteristic that gives a substance the ability to undergo a change that results in a new substance. |
| Chemical change. | is a change in the identity of a substance due to the chemical properties of that substance.A new substance or substances are formed as a result of such a change. |
| Heat. | is a form of energy that flows from a warmer object to a cooler object. |
| Law of conservation of mass | it states that the mass of what you end with is always the same as the mass of what you start with. |
| Law of conservation of energy | it states that energy cannot be created or destroyed but can only be transformed from one form into another. |
| Law of conservation of matter | it states that matter is not created or destroyed-it only changes its form. |
| Moving Particles. | matter is made up of moving particles.The state of mater is determined by how much energy the particles have. |
