Elementary Academic Words

Words for students from kindergarten to grade 8, each grade has 4 lists: art, math, science, and social. They are essential vocabulary for elementary academic classes.

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