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Matter and Energy 2
Unit 1 Matter and Energy Part 2
Term | Definition |
---|---|
Pure Substances | A material that is composed of only one type of particle, whether it be an atom or molecule. |
Physical Change | A change from one state (solid, liquid, gas, or plasma) to another without a change in chemical composition. |
Chemical Change | A process where chemical bonds are broken and new bonds are formed between different atoms. |
Conservation of Energy | A principle stating that energy cannot be created nor destroyed, but can be altered from one form to another. |
Conservation of Matter | A fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system, but can only change form. |
Heat Flow | The amount of heat transferred. |
Reactivity | The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy. |
Conbustibility | A measure of how easily a substance will set on fire. |
Precipitate | To cause (a substance) to be deposited in solid form from a solution. |
Potential Energy | The energy of a particle or system of particles derived from position, or condition, rather than motion. (stored energy) |
Kinetic Energy | The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed. (energy in motion) |
Chemical Reaction | Interaction of two or more chemicals that produces one or more new chemical compounds, or alters the properties of the original substances. |
Heat | The form of energy that flows between two samples of matter due to their difference in temperature. |
Substances | A particular kind of matter with uniform properties. |
Homogeneous | Uniform in structure or composition throughout. |
Heterogeneous | Consisting of dissimilar elements or parts; not homogeneous. |