Special English word list: Science programs

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Parts of speech: n. (noun) - a name word; (verb) - an action word; ad. (adjective/adverb) - a describing word; prep. (preposition) - a word used to show a relation; pro. (pronoun) - a word used in place of a noun; conj. (conjunction) - a joining word

Science programs word list

1. atom - a very small part of all things; the smallest part of an element that can join with parts of other elements
2. bacteria - living things that are one cell and can be seen only through a microscope; some cause disease
3. cell - a small mass of living material that is part of all plants and animals
4. chromosome - a line of genes; most human cells contain 46 chromosomes
5. compound - a substance containing two or more elements
6. dense - close together; thick
7. electron - a small part of an atom that has an electrical force
8. element - one of more than 100 substances known to science that cannot be separated into other substances
9. enzyme - a special kind of protein; it produces changes in other substances without being changed itself
10. fetus - unborn young
11. fission - a splitting; in atomic fission, the nucleus of an atom is split to produce nuclear energy
12. fusion - a joining together; in atomic fusion, atomic particles are joined together to produce nuclear energy
13. genes - parts of cells that control the growth and development of living things; genes from the mother and father are passed to the child; genes contain nucleic acid
14. genetic engineering - the science of changing the genes of a living organism
15. gravity - the force that pulls things toward the center of the earth
16. image - a reproduction of the appearance of a person or thing
17. laser - an instrument that makes a thin, powerful light
18. magnet - a piece of iron or other material that has a pulling force; this pulling force is called magnetism
19. molecule - the smallest amount of a chemical substance that can exist
20. nerve - a thin piece of tissue that sends information through the body to and from the brain
21. nucleus - the center part of an atom or cell
22. nucleic acid - a molecule that holds the genetic information necessary for life; there are two kinds of nucleic acid: DNA (deoxyribonucleic acid) and RNA (ribonucleic acid)
23. nutrient - a food or substance that makes plants, humans or animals grow
24. organ - a part of the body that has a special purpose, such as the heart or brain
25. organism - a living thing, often so small it can be seen only through a microscope
26. particle - a very small piece of matter
27. proteins - substances responsible for the growth of tissue and for fixing damaged tissue
28. robot - a machine that moves and performs tasks
29. tissue - living material; a group of cells that are similar in appearance and do the same thing
30. virus - a kind of organism that causes disease
31. x-rays - a kind of radiation that can pass through most solid materials, often used in medicine