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Review for Semester 1 Vocabulary - Grade 8 Science

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

organism   a living thing  
cell   the basic unit of structure and function in an organism  
unicellular   made of a single cell  
multicellular   consisting of many cells  
autotroph   an organism that makes its own food  
heterotroph   an organism that cannot make its own food  
prokaryote   an organism whose cells lack a nucleus and some other cell structures  
eukaryote   an organism whose cells contain nuclei  
virus   a tiny, nonliving particle that invades and then reproduces inside a living cell  
host   an organism that provides a source of energy or a suitable environment for a virus or another organism to live  
parasite   an organism that lives on or in a host and causes harm to the host  
bacteria   single-celled organisms that lack a nucleus; prokaryotes  
decomposer   an organism that breaks down chemicals from dead organisms and returns important materials to the soil and water  
protist   an eukaryotic organism that cannot be classified as an animal, plant, or fungus  
symbiosis   a close relationship between two organisms in which at least one of the organisms benefit  
mutualism   a type of symbiosis in which both partners benefit from living together  
fungus   an eukaryotic organism that has cell walls, uses spores to reproduce, and is a heterotroph that feeds by absorbing its food  
photosynthesis   the process by which plants and some other organisms capture and use light energy to make food from carbon dioxide and water  
zygote   a fertilized egg  
chlorophyll   a green pigment found in the chloroplasts of plants, algae, and some bacteria  
phloem   the vascular tissue through which food moves in some plants  
xylem   the vascular tissue through which water and nutrients move in some plants  
germination   the sprouting of the embryo out of a seed; occurs when the embryo resumes its growth  
gymnosperm   a plant that produces seeds that are not enclosed by a protective fruit  
angiosperm   a flowering plant that produces seeds enclosed in a protective structure  
tropism   the growth response of a plant toward or away from a stimulus  
stimulus   a change in an organism's surroundings that causes the organism to react  
annual   a flowering plant that completes its life cycle in one growing season  
biennial   a flowering plant that completes its life cycle in two years  
perennial   a flowering plant that lives for more than two years  
plant   the kingdom that contains only multicellular autotrophic eukaryotes  
animal   the kingdom that contains only multicellular heterotrophic eukaryotes  
response   an action or change in behavior that occurs as a result of a stimulus  


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Created by: gsaliba