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Eighth Grade Science Review

Teacher: Mr. Draper
a stable subatomic particle with a charge of negative electricity, found orbiting the nucleus of an atom
symbiosis that is beneficial to both organisms involved
the name given to a horizontal row of the periodic table
A disease that has spread over a whole country or the world
the rigid outer part of the earth, consisting of the crust and upper mantle
an organism, either a green plant or bacterium, which is part of the first level of a food chain
The substance that is dissolved in a solution
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties
the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it
repair and growth; a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock
the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth
The role or function of an organism or species in an ecosystem
has mass and takes up space
The sudden start of a disease
physical rather than biological; not derived from living organisms
fatty acids that include many natural oils, waxes, and steroids
any of a group of unicellular, multicellular, or syncytial spore-producing organisms feeding on organic matter, including molds, yeast, mushrooms, and toadstool
A substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease
a substance that is formed as the result of a chemical reaction. Products are on the right side of a chemical equation
the relationship between diverse organisms that live together
A substance that cannot be broken down into simpler substances by chemical means
the study of heredity and the variation of inherited characteristics
a substance that takes part in and undergoes change during a reaction. Reactants are on the left side of a chemical equation
a simple sugar that is an important energy source in living organisms and is a component of many carbohydrates
uniform, same throughout
Reaction that produces heat as the reaction proceeds
a crack in the earth's crust resulting from the displacement of one side with respect to the other
a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign
the state or process of a species, family, or larger group ceasing to exist; the species has vanished
a group of organisms belonging to the same species that live in a particular area. May be described by their size, density, or distribution
the chemical processes that occur within a living organism in order to maintain life
physical property; mass divided by volume
A widespread occurrence of an infectious disease in a community at a particular time
a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen
the process of being broken down by wind, water, or other natural agents
reproduction; a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores
An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host