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Definition
| a large, complex molecule built from smaller molecules joined together in a repeating pattern |
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Term
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Definition
| smaller molecules from which polymers are built |
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Term
| What forms when chemical bonds link large numbers of monomers in a repeating pattern? |
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Definition
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Term
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Definition
| synthetic polymers that can be molded, or shaped |
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Term
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Definition
- combines two or more substances in a new material with different properties
- include one or more polymers
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Term
| What are synthetic polymer's characteristics? |
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Definition
- inexpensive
- strong
- last a long time
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Term
| It is cheaper to throw plastics away and make new ones then to reuse them but this does what? |
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Definition
| increases the volume of trash |
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Term
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Definition
| a mixture made of two or more elements that has the properties of metal |
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Term
| Alloys are used more than pure metals because... |
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Definition
- they are stronger
- less likely to react with air or water
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Term
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Definition
| by melting metals and mixing them together in carefully measured amounts |
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Definition
| hard, crystalline solids made by heating clay and other mineral materials to high temperatures |
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Definition
- resist moisture
- don't conduct electricity
- can withstand temperature that would cause metals to melt
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Term
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Definition
| a clear, solid material with no crystal structure |
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Definition
- clear
- can be made into shapes and colors
- can't be penetrated by liquids
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Definition
| a threadlike piece of glass (or plastic) that can be used for transmitting light |
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Term
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Definition
| reactions involving the particles in the nucleus of an atom |
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Term
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Definition
| the atomic nuclei of unstable isotopes release fast-moving particles and energy |
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Term
| Natural radioactive decay can produce... |
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Definition
| aloha particles, beta particles, and gamma rays. |
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Term
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Definition
| consists of two protons and two neutrons and is positively charged |
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Term
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Definition
| a fast-moving electron given off by a nucleus during radioactive decay |
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Term
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Definition
| consists of high-energy waves, similar to x-rays |
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Term
| Radioactive isotopes decay are useful how |
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Definition
- determining the ages of natural materials on Earth
- tracing the steps of chemical reactions and industrial processes
- diagnosing and treating disease
- providing sources of energy
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Term
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Definition
| an isotope is the length of time needed for half of the atoms of a sample to decay |
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Term
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Definition
| the process of determining the age of an object using the half-life of one or more radioactive isotypes |
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Term
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Definition
| radioactive isotopes that can be followed through the steps of a chemical reaction or an industrial process |
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