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Science
California Science
Grade 4
e-Glossary
D
List of Words for Letter 'D'
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to hear the word and definition
decomposer
an organism that breaks down other organisms
delta
an area of land caused by deposition at the mouth, or end, of a river
deposition
the dropping off of weathered rock at the end of erosion
desert
an ecosystem with few plants and little water
diaphragm
the part of a loudspeaker that vibrates and produces sound waves
direct current
electrical current that flows through a circuit in just one direction
discharge
a release of electrical energy from one object to another
dormant volcano
a volcano that is quiet and no longer erupts
draw conclusions
to arrive at possible answers based on information you have gathered
drought
a long period with little or no rain
dynamo
something that generates a great amount of energy