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Science
California Science
Grade 6
e-Glossary
E
List of Words for Letter āEā
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earthquake
the shaking of the ground that occurs when tectonic plates shift and change positions
ecology
the study of organisms and how they interact in an ecosystem
ecosystem
the living and nonliving things in an area that interact with one another
eddy
a small, spinning air current that often develops when wind flows over buildings, mountains, or other obstructions
efficiency
the amount of usable energy given off by an energy conversion compared to the total amount of energy used in the conversion
electromagnetic spectrum
the wide arrange of electromagnetic radiation ordered by wavelength
electromagnetic wave
a wave that is made up of alternating electric and magnetic fields created by vibrating electric charges
electron microscope
a powerful microscope that uses a beam of electrons, rather than a light source, to magnify samples
emergent layer
the uppermost rain-forest layer, made up of very tall trees that emerge from the forest below into the sunlight above
emission
the process of giving off absorbed electromagnetic waves
energy
the ability to bring about changes or to do work
energy conversion
the process in which energy changes from one form into another
energy pyramid
a model that shows how energy moves through a food chain
energy source
the origin of the light, heat, or electrical energy people use
ENSO
the disruption of the ocean-atmosphere system in the Pacific ocean and the impact that it has on weather around the globe
epicenter
the point on Earth's surface directly above the focus of an earthquake and the place where the strongest shocks are felt
epidermis
the outermost part of a leaf
erosion
the wearing away of Earth's surface by the breakdown and transportation of rock and soil
estuary
the part of a river where fresh water meets the sea and is affected by tides
ethanol
a fuel that can be mixed with gasoline to run cars
eukaryote
an organism with a nucleus in each cell; is more complex than a prokaryote
evaporation
the process in which a liquid changes into a gas
evergreen
a tree that usually keeps its leaves all year
extinct
describes a volcano that has not erupted within recorded history