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31 Cards in this Set

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  • Back
In what galaxy is our sun located?
Milky Way
In what form of energy is 93% of the sun's energy emitted? They include visible light, x-rays, and radio waves.
electromagnetic waves
What are tiny particles of matter that travel at the speed of light and have the ability to penetrate huge thicknesses of ordinary matter - even the entire earth itself? This makes up 7% of the energy emitted by the sun.
neutrino
What is the distance from the crest (top) of one wave to the crest of the next?
wavelength
What is the tool astronomers use to "fingerprint" the light coming from stars and planets? This helps astronomers determine what elements are present.
spectroscope
What are the wavelengths that compose the light from an object?
spectrum
What is used in a modern spectroscope to separate light into its different wavelengths? It is a thin plate of glass or plastic containing thousands of microscopic lines.
diffraction grating
What is the superheated, ionized matter that the sun is made of? It can't be classified as a solid, liquid, or gas.
plasma
Atoms that have lost or gained one or more electrons and thus carry an electrical charge are called what?
ionized
What is the visible surface of the sun called?
photosphere
What are the bumps on the surface of the sun that are caused by hotter plasma bubbling up from the sun's interior to the photosphere?
granules
What are the small, dark areas that appear on the sun's surface?
sunspots
What is the edge of the sun called?
limb
What is the dark, central region of a sunspot?
umbra
What is the lighter surrounding border of a sunspot?
preumbra
What is a severe storm on the sun?
solar flare
What is the energy given off by a solar flare?
radiation
What is the layer of gases that forms the innermost layer of the sun's atmosphere?
chromosphere
What is the outer portion of the sun's atmosphere that becomes the solar wind? It is extremely hot, low-density, and large.
corona
What is the instrument used to observe the corona of the sun by creating an artificial eclipse?
coronagraph
What are the pointed jets of gasses from the top of the sun's chromosphere called?
spicules
What is a large, bright, spot in the sun's photosphere? It is usually near a sunspot. It is when plagues emit light in multiple wavelengths.
facula
What are the high-speed particles from the sun's corona (mostly protons and electrons) that travel outward into space?
solar wind
What is an immense streamerlike disturbance that rises into the corona and then gradually falls back?
prominence
What is the innermost section of the sun where most of the thermonuclear reactions occur?
core
What is the middle zone of the sun's interior?
radiative zone
In what form is the electromagnetic energy in the radiative zone?
photon
What besides density is so great in the sun's core that there is very little movement of the plasma particles?
pressure
What is the outermost region of the sun's interior?
convective zone
What is the energy received by the earth from the sun?
solar energy
What device is used to convert the sun's energy directly to electricity?
photovoltaic (PV) cell