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Z zoo - n. a place where animals are kept for the public to look at and study ------------------------------------------------------------------------------- dis - not (dishonest, disobey) pro2 - for, supporting (pro-labor, pro-government) re - to do again (reorganize, reunite) self - used to show that the person or group acting3 is the one affected4 by the action, or to show that the action is done only by its own effort or power (self-declared, self-appointed) un - not (unusual, unhappy) ------------------------------------------------------------------------------- Common Expressions carry out - to do; to put into effect ("Please carry out the plan.") pass a bill - approve ("Congress is expected to pass a bill to cut taxes.") take steps - to start to do something ("The government will take steps to halt inflation.") ------------------------------------------------------------------------------- Words Used in VOA Special English Science Programs atom - a very small part of all things; the smallest part of an element that can join with parts of other elements bacteria - living things that are one cell and can be seen only through a microscope; some cause disease cell - a small mass of living material that is part of all plants and animals chromosome - a line of genes; most human cells contain 46 chromosomes compound - a substance containing two or more elements dense - close together; thick electron - a small part of an atom that has an electrical force element - one of more than 100 substances known to science that cannot be separated into other substances enzyme - a special kind of protein; it produces changes in other substances without being changed itself fetus - unborn young fission - a splitting; in atomic fission, the nucleus of an atom is split to produce nuclear energy fusion - a joining together; in atomic fusion, atomic particles are joined together to produce nuclear energy 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 genetic engineering - the science of changing the genes of a living organism gravity - the force that pulls things toward the center of the earth image - a reproduction of the appearance of a person or thing laser - an instrument that makes a thin, powerful light magnet - a piece of iron or other material that has a pulling force; this pulling force is called magnetism molecule - the smallest amount of a chemical substance that can exist nerve - a thin piece of tissue that sends information through the body to and from the brain nucleus - the center part of an atom or cell 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) nutrient - a food or substance that makes plants, humans or animals grow organ - a part of the body that has a special purpose, such as the heart or brain organism - a living thing, often so small it can be seen only through a microscope particle - a very small piece of matter proteins - substances responsible for the growth of tissue and for fixing damaged tissue robot - a machine that moves and performs tasks tissue - living material; a group of cells that are similar in appearance and do the same thing virus - a kind of organism that causes disease x-rays - a kind of radiation that can pass through most solid materials, often used in medicine ---------------------------------------------------------------------------- Organs of the Body heart - pumps blood through the body intestines - tubes through which food passes after it is broken down in the stomach; part of the intestines also remove solid wastes from the body kidney - cleans liquid wastes from the body liver - makes some proteins and enzymes; removes poisons from the blood lung - takes in and expels air from the body prostate - a part of the male reproductive system stomach - breaks down food for the body to use uterus - a part of the female reproductive system where a fetus develops
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