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32 Cards in this Set

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