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Earth Science
Unit 4 Ch 1
44
Science
8th Grade
05/09/2007

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Cards

Term
Genesis 1:16
Definition
refers to the sun as the "greater light to rule the day"
Term
Milky Way Galaxy
Definition
sun is not at the center
it is about 3/5 of the way between the center and the edge
Term
150 million km
Definition
sun's distance from the earth
Term
diameter of the sun
Definition
1.4 million km
Term
moon's size in relation to the sun
Definition
moon appears as large as the sun because the moon is much closer to the earth than the sun
Term
electromagnetic waves
Definition
most of the sun's energy travels in the form of these
Term
7 % of the sun's energy
Definition
travels in the form of neutrinos, which travel at the speed of light
Term
wavelength
Definition
distance from the crest of one wave to the crest of the next wave
Term
x-rays
Definition
the shortest wavelength of all rays emitted by the sun
Term
human eye
Definition
can detect rays of.0004mm to .0007mm
Term
diffraction grating
Definition
a series of thousands of microscopic lines that produce a spectrum much like that produced by a prism
Term
spectroscope
Definition
instrument used to see the patterns of lines as seen in elements

also identifies chemical elements in an incandescent light source by Astronomers
Term
rainbow
Definition
is sunlight that raindrops have separated into its component colors
Term
yellow
Definition
color best seen by the human eye
Term
Hydrogen
Definition
most abundant element in the sun
Term
helium
Definition
second most abundant element in the sun
Term
number of identified elements in the sun
Definition
60
Term
plasma
Definition
sun's surface
Term
photosphere
Definition
visible surface of the sun
Term
what scientist believe about granules
Definition
seething masses of hot plasma rising from the sun
Term
sunspots
Definition
small dark areas of the sun's surface
Term
disappearance and appearance of sunspots
Definition
shows the earth's rotation
Term
Sunspot temperatures
Definition
cooler that the photosphere surrounding them
Term
elevn years
Definition
average maximum of a sunspot
Term
ionosphere
Definition
layer of the earth's atmosphere where there is an abundance of ionized particles
Term
penumbra
Definition
outer (lighter) part of a sunspot
Term
umbra
Definition
inner (darker) part of a sunspot
Term
length of a sunspot
Definition
usually last from a few days to a few weeks
Term
radio waves
Definition
when more ionizing takes place in the atmosphere radio waves are reflected better
Term
solar flares (severe solar storms)
0r Coronal mass ejection
Definition
can hinder radio waves on earth
Term
coronagraph
Definition
instrument used by astronomers to produce an artificial solar eclipse when observing the sun's atmosphere
Term
temperature of the corona
Definition
higher that the temperature of the photosphere
Term
sun's atmosphere
Definition
chromosphere (lower level) has pointed jets called spicules
corona (outer layer) into which prominences arise
Term
prominences
Definition
streams of plasma material that rise up and descend from the sun's corona
Term
solar wind
Definition
flow of mostly protons and neutrons
Term
sun's interior
Definition
core
radiative zone
convective zone
Term
core
Definition
innermost part of the sun where thermonuclear reactions take place
hydrogen atoms combine to make helium
Term
core
Definition
innermost part of the sun where thermonuclear reactions take place
hydrogen atoms combine to make helium
Term
radiative zone
Definition
where the energy travels as electromagnetic waves
Term
convective zone
Definition
where hot plasma rises to the surface, cools,and descends into the sun's interior
Term
Eagle Nebula
Definition
no scientific evidence that stars are forming in this
Term
Heb. 1:11
"the heavens are wearing out like a garment"
Definition
the sun is losing matter- it is wearing away
Term
uses of solar energy
Definition
heating in homes and businesses
Term
disadvantage to solar energy
Definition
it is diffuse (spread out)
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