Term
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Definition
The introduction of chemicals, particles, or organisms to
air that are harmful to living things and structures. |
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Term
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Definition
The condition of air in terms of the amount of pollutants
it contains. |
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Term
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Definition
| The basic building block of matter |
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Term
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Definition
| An instrument used by scientists to measure mass. |
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Term
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Definition
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Term
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Definition
| The temperature at which a liquid changes to a gas. |
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Term
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Definition
| The simplest type of substance made of identical atoms. |
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Term
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Definition
| A change from a liquid to a gas at a temperature that is lower than the boiling point. |
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Term
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Definition
| The process in which a gas cools to form a liquid. |
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Term
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Definition
| The temperature at which a liquid turns into a solid. |
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Term
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Definition
| The process in which a liquid cools to form a solid. |
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Term
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Definition
Matter that has no definite shape
or volume. It takes the shape and volume of its container. The particles are far apart and move rapidly and randomly. |
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Term
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Definition
The transfer of thermal energy from a warmer substance
to a cooler one. |
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Term
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Definition
Matter that has a definite volume
but not a definite shape. It takes the shape of its container. The particles remain close together and
slide past each other in a fluid motion. |
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Term
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Definition
| A word used to describe an observation that can be seen by the unaided eye. |
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Term
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Definition
| The amount of “stuff” something contains. |
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Term
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Definition
| Anything that has volume (takes up space) and has mass. |
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Term
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Definition
| The temperature at which a solid changes to a liquid. |
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Term
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Definition
A word to describe an observation that cannot be seen with
the unaided eye. |
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Term
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Definition
| A combination of two or more atoms. |
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Term
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Definition
| A state of matter that forms from gases at very high temperatures. |
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Term
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Definition
| A substance that can make air, soil, or water harmful to organisms and structures. |
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Term
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Definition
Matter that has a definite shape and volume and an organized arrangement of particles that remain
very close together and vibrate slowly. |
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Term
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Definition
A measure of the average speed of the particles of matter,
which changes as the particles move faster (warmer) or slower (colder). |
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Term
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Definition
| A measure of how much space something takes up. |
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Term
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Definition
| The form matter takes (solid, liquid, gas or plasma). |
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