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Test your basic knowledge |
DSST Astronomy
Start Test
Study First
Subjects
:
dsst
,
science
Instructions:
Answer 42 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Areas on the sun's surface that are cooler and less bright than surrounding areas - are caused by the sun's magnetic field - and occur in cycles.
Redshift
Neutron Star
Sunspots
Nicolaus Copernicus
2. Also called nuclear bulge - this is a swelling at the center of spiral galaxies. Bulges consist of old stars and extend out a few thousand light-years from the galactic centers.
Parallax
Galactic Bulge
Neutron Star
Doppler Effect
3. Either of the two celestial points at which the celestial equator intersects the ecliptic plane.
Nicolaus Copernicus
Quasar
Light Year
Equinox
4. Depressions that form when a volcano collapses - as opposed to craters formed by meteoroid impact.
Comet
Radiation
Orion-Cygnus Arm
Calderas
5. A narrow - bright region of the spectrum - produced when electrons in atoms jump from one energy level to a lower energy level.
Emission Line
Newton's Laws
Terrestrial Planets
Brown Dwarf
6. Stage in which a star has used up its helium and its outer layers escape into space - leaving behind a hot - dense core that contracts.
Quasar
Red Giant
Retrograde
White Dwarf
7. An immense cloud of gas (mainly hydrogen) and dust in interstellar space.
Light Year
Absorption Lines
300 -000 -000
Nebula
8. The younger stars - some of which are blue - that populate a galaxy's disk - especially its spiral arms. High in heavy metals.
Doppler Effect
Nicolaus Copernicus
Population I Stars
Binary Star
9. The apparent displacement of an object as seen from two different points that are not on a line with the object.
Cepheid Variable
Parallax
Solstice
Electromagnetic Spectrum
10. Either of the two times of the year when the Sun is at its greatest distance from the celestial equator.
Calderas
300 -000 -000
Radiation
Solstice
11. Arrangement of electromagnetic radiation--including radio waves - visible light - gamma rays - X-rays - ultraviolet waves - infrared waves - and microwaves--according to their wavelengths.
Electromagnetic Spectrum
Galactic Bulge
23:56
Absorption Lines
12. The plane of the Earth's orbit around the Sun.
Ecliptic Plane
Terrestrial Planets
Calderas
Parallax
13. Large - dense groupings of older stars held together by mutual gravitational attraction - which is what keeps them together longer than open clusters.
Globular Clusters
Brown Dwarf
Retrograde
Pulsar
14. The dark lines in a spectrum where light of particular wavelengths has been absorbed.
Asterism
Absorption Lines
Lunar Month
Emission Line
15. A streak of light in the night sky that results when a meteoroid hits the earth's atmosphere - and air friction causes the meteoroid to melt or vaporize or explode.
Quasar
Population II Stars
Meteor
Terrestrial Planets
16. The distance that light travels in one year; about 9.46 trillion kilometers.
Brown Dwarf
Galileo Galilei
Light Year
Absorption Lines
17. The name given to the four inner planets: Mercury - Venus - Earth - and Mars. Mercury and Venus lack moons.
Radio Galaxy
Electromagnetic Spectrum
Newton's Laws
Terrestrial Planets
18. A shift in the lines of an object's spectrum toward the red end. It indicates that an object is moving away from the observer. The larger it is - the faster the object is moving.
Redshift
Pulsar
Retrograde
Seyfert Galaxy
19. Polish astronomer who produced a workable heliocentric model of the solar system.
Population I Stars
Quasar
Radiation
Nicolaus Copernicus
20. Type of active galaxy whose emissions come from a very small region within the nucleus of an otherwise normal-looking spiral system.
Seyfert Galaxy
Brown Dwarf
Doppler Effect
Quasar
21. The large - outer planets made of gas - Jupiter - Saturn - Uranus - & Neptune. These all have large moons and rings.
Retrograde
Jovian Planets
Light Year
Asterism
22. Very bright - often giant - elliptical galaxy type that emits as much or more energy in the form of radio wavelengths as it does wavelengths of visible light.
Nicolaus Copernicus
Radio Galaxy
Pulsar
Seyfert Galaxy
23. Energy that is radiated or transmitted in the form of rays or waves or particles.
White Dwarf
Electromagnetic Spectrum
Binary Star
Radiation
24. A star that expands and cools once it runs out of hydrogen fuel.
Neutron Star
Orion-Cygnus Arm
Nicolaus Copernicus
Red Giant
25. A change in the apparent frequency of a wave - as observer and source move toward or away from each other.
Absorption Lines
Solstice
Doppler Effect
Newton's Laws
26. The older - redder stars that populate a galaxy's hale and bulge. Low metallicity.
Blue Giant
Population II Stars
Lunar Month
Nicolaus Copernicus
27. The period between successive new moons (29.531 days).
Comet
Lunar Month
Retrograde
Equinox
28. The speed of light in meters per second. It is also 300 -000 kilometers per second and 186 -000 miles per second.
300 -000 -000
Globular Clusters
Calderas
Brown Dwarf
29. The portion of the Milky Way in which our solar system resides.
Emission Line
Orion-Cygnus Arm
Doppler Effect
Radio Galaxy
30. A pair of stars held together by their mutual gravity and in orbit about each other which can be seen with a telescope as separate objects.
Emission Line
Galileo Galilei
Binary Star
Red Giant
31. A relatively small extraterrestrial body consisting of a frozen mass that travels around the Sun in a highly elliptical orbit.
Nebula
Absorption Lines
Comet
Seyfert Galaxy
32. Large - hot - bright star late in the main sequence - having exhausted its hydrogen fuel. Its name comes from its color and size.
Absorption Lines
Blue Giant
Pulsar
Nicolaus Copernicus
33. An orbit that is backward or contrary to the orbital direction of the other planets.
Nicolaus Copernicus
Asterism
Retrograde
Radio Galaxy
34. 1. If no forces act on a body - its speed and direction of motion stay constant (an object in motion stays in motion - an object at rest stays at rest). 2. Force=mass x acceleration (F=ma). 3. When two bodies interact - they exert equal and opposite
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35. Italian astronomer and mathematician who was the first to use a telescope to study the stars.
Orion-Cygnus Arm
Binary Star
Galileo Galilei
Blue Giant
36. A rapidly rotating neutron star which emits radiation in magnetic pulses.
Neutron Star
300 -000 -000
Pulsar
Parallax
37. The most precise measurement of Earth's rotation time.
Asterism
Sunspots
23:56
Solstice
38. A type of pulsating variable star that changes brightness in a regular and predicable manner - making it a useful 'standard candle' for learning absolute magnitudes.
Cepheid Variable
Doppler Effect
Jovian Planets
Redshift
39. The small - dense remains of a high-mass star after a supernova.
Pulsar
Neutron Star
Light Year
Doppler Effect
40. 'Failed' star; a star not massive enough to sustain nuclear fusion.
Comet
Brown Dwarf
Calderas
Equinox
41. Short for 'quasi-stellar radio source -' a bright - point-like object that produces the luminosity of 100 to 1 -000 galaxies within a region the size of a solar system.
Quasar
Electromagnetic Spectrum
Radiation
Seyfert Galaxy
42. A cluster of stars (or a small constellation).
Absorption Lines
Seyfert Galaxy
Asterism
Ecliptic Plane