7th Grade Cards: Science

Words for students of 7th Grade, the page is for science words (List 1), which are essential vocabulary for 7th Grade academic classes.
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 7th Grade Cards: Science (click the card to toggle it.)
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aerobic
enhancing respiratory and circulatory efficiency; depending on free oxygen or air
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anaerobic
living or active in the absence of free oxygen
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asexual reproduction
reproduction without the fusion of gametes
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asteroids
any of numerous small celestial bodies that revolve around the sun
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carbon cycle
a thermonuclear reaction in the interior of stars; the organic circulation of carbon from the atmosphere into organisms and back again
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cell organelles
specialized part of a cell; analogous to an organ
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chromosome
a structure in the cell nucleus that contains DNA
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density
thickness; quantity of something per unit measure, especially per unit length, area, or volume
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diffusion
act of dispersing or diffusing something
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gene
a segment of DNA that is involved in producing a polypeptide chain
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heredity
genetics; inheritance; genetic transmission of characteristics from parent to offspring
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homeostasis
metabolic equilibrium actively maintained by several complex biological mechanisms that operate via the autonomic nervous system to offset disrupting changes
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meiosis
cell division that produces reproductive cells in sexually reproducing organisms
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mitosis
cell division in which the nucleus divides into nuclei containing the same number of chromosomes
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organ
natural part or structure in animal or plant, capable of performing some special action
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organisms
discrete and complete living thing, such as animal, plant, fungus or microorganism
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osmosis
diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
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photosynthesis
chemical combination brought about by the action of light
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qualitative change
changes in kind or type
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quantitative change
an alteration in the number
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respiration
breathing; process of inhaling and exhaling; oxidative process occurring within living cells
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sexual reproduction
reproduction involving the union or fusion of a male and a female gamete
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species diversity
the variety of species in a given region or area
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tissue
groups of cells that make particular parts of the body; soft thin paper
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transpiration
the process of giving off or exhaling water vapor through the skin or mucous membranes; the emission of water vapor from the leaves of plants
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transport
carry from one place to another; carry away; deport