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Science
California Science
Grade 4
e-Glossary
B
List of Words for Letter 'B'
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bacteria
microorganisms that have cell membranes but no nuclei
barrier island
a long, narrow strip of land formed along the ocean shore by deposition
biomass
a measure of the amount of living things in an environment
biotic factor
a living part of the ecosystem
blubber
a thick layer of fat found in large mammals
branch
in a parallel circuit, one of the paths that electric current can follow
buildup
having more of one kind of charge than the other