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32 Cards in this Set
- Front
- Back
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amplifier
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a device that increases the strength of an electric signal from a microphone
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animal kingdom
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one of three kingdoms into which all living things can be classified
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antibiotic
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a substance which, when introduced into the body, controls many bacterial infections
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antiseptic
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one kind of substance that slows down or stops the growth of bacteria outside the body
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atomic number
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the number of protons in the nucleus of an atom; also the index of the properties of the atom
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bacilli (bacillus, S.)
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rod-shaped bacteria
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bacteria (bacterium, S.)
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microscopic organisms found just about everywhere on Earth; some are "good" and some cause disease
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binary stars
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a pair of stars circling around a common center
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biomes
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areas with similar geography and climate; similar plants and animals live in these similar areas
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black hole
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an area surrounding a dead star; has such a strong gravitational pull that light is trapped inside
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carnivore
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an animal that eats only other animals
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chain reaction
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a process in which neutrons from the fission of one atomic nucleus cause fission of other nuclei
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chlorophyll
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a green substance in green plant cells that allows photosynthesis to take place
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chromosome
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a structure inside the nucleus of a cell that contains substances which determine the characteristics of new organisms
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cilia
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tiny hairs that line the inside of the nose and the tubes to the lungs
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circuit-breaker
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a switch that automatically stops the flow of electric current when there is a short circuit or an overload
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cocci (coccus, S.)
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sphere-shaped bacteria
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colony
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a group of many bacteria
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community
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a group of living things in one place
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concave lens
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a lens that is thicker near the edges than in the middle; forms an image by spreading out light in an orderly way
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concave mirror
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a mirror that is curved inward like the inner surface of a spoon
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conductor
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a substance through which an electric current can easily flow
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coniferous
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bearing cones; have needlelike leaves that fall all year
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constellation
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a pattern of stars seen with the unaided eye in a small region of the sky
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consumer
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a living thing that cannot make its own food but must instead find food and eat it
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control
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that part of an experiment that includes all conditions (variables) except the one being studied
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convex lens
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a lens that is thicker in the middle than near the edges; focuses light at a point
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convex mirror
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a mirror that is curved outward like the outer surface of a spoon
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cross-pollination
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the transfer of pollen from the stamen of one flower to the pistil of another
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current electricity
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an electric charge that is moving from one place to another
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deciduous
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shedding leaves annually
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decomposer
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a living thing that feeds on dead matter; most common are decay bacteria
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