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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. The speed of light in meters per second. It is also 300 -000 kilometers per second and 186 -000 miles per second.
Globular Clusters
Galileo Galilei
300 -000 -000
Nicolaus Copernicus
2. Depressions that form when a volcano collapses - as opposed to craters formed by meteoroid impact.
Globular Clusters
Calderas
Solstice
Galactic Bulge
3. Italian astronomer and mathematician who was the first to use a telescope to study the stars.
Nebula
Galileo Galilei
Red Giant
Calderas
4. 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.
Population I Stars
Sunspots
Asterism
Meteor
5. A rapidly rotating neutron star which emits radiation in magnetic pulses.
Binary Star
Newton's Laws
Pulsar
Lunar Month
6. The period between successive new moons (29.531 days).
Population I Stars
Lunar Month
Meteor
Seyfert Galaxy
7. Large - dense groupings of older stars held together by mutual gravitational attraction - which is what keeps them together longer than open clusters.
Comet
Globular Clusters
Cepheid Variable
Parallax
8. 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
Brown Dwarf
Solstice
Parallax
9. Energy that is radiated or transmitted in the form of rays or waves or particles.
Comet
Neutron Star
Radiation
Calderas
10. 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.
Newton's Laws
Ecliptic Plane
Radio Galaxy
Nicolaus Copernicus
11. Either of the two times of the year when the Sun is at its greatest distance from the celestial equator.
Ecliptic Plane
Neutron Star
Solstice
Calderas
12. The apparent displacement of an object as seen from two different points that are not on a line with the object.
Calderas
Parallax
Meteor
Redshift
13. 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.
Galactic Bulge
Orion-Cygnus Arm
Comet
Equinox
14. 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.
Radio Galaxy
Seyfert Galaxy
Nicolaus Copernicus
Quasar
15. Either of the two celestial points at which the celestial equator intersects the ecliptic plane.
23:56
Absorption Lines
Electromagnetic Spectrum
Equinox
16. The most precise measurement of Earth's rotation time.
White Dwarf
Light Year
Jovian Planets
23:56
17. A relatively small extraterrestrial body consisting of a frozen mass that travels around the Sun in a highly elliptical orbit.
Jovian Planets
Lunar Month
Comet
Ecliptic Plane
18. An orbit that is backward or contrary to the orbital direction of the other planets.
Blue Giant
Comet
Red Giant
Retrograde
19. The dark lines in a spectrum where light of particular wavelengths has been absorbed.
Red Giant
Equinox
Light Year
Absorption Lines
20. A star that expands and cools once it runs out of hydrogen fuel.
Seyfert Galaxy
Meteor
Red Giant
Calderas
21. Large - hot - bright star late in the main sequence - having exhausted its hydrogen fuel. Its name comes from its color and size.
Brown Dwarf
Globular Clusters
Redshift
Blue Giant
22. 'Failed' star; a star not massive enough to sustain nuclear fusion.
Pulsar
Binary Star
Brown Dwarf
Blue Giant
23. A cluster of stars (or a small constellation).
Nicolaus Copernicus
Equinox
Nebula
Asterism
24. The distance that light travels in one year; about 9.46 trillion kilometers.
Comet
Parallax
Light Year
Newton's Laws
25. The plane of the Earth's orbit around the Sun.
Newton's Laws
Blue Giant
Equinox
Ecliptic Plane
26. 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.
Sunspots
White Dwarf
Equinox
Seyfert Galaxy
27. 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.
Sunspots
Equinox
Asterism
Binary Star
28. The name given to the four inner planets: Mercury - Venus - Earth - and Mars. Mercury and Venus lack moons.
Pulsar
Terrestrial Planets
Nebula
Galileo Galilei
29. A change in the apparent frequency of a wave - as observer and source move toward or away from each other.
Redshift
Doppler Effect
Retrograde
Emission Line
30. The large - outer planets made of gas - Jupiter - Saturn - Uranus - & Neptune. These all have large moons and rings.
Solstice
300 -000 -000
Jovian Planets
Pulsar
31. The portion of the Milky Way in which our solar system resides.
Doppler Effect
Comet
Parallax
Orion-Cygnus Arm
32. An immense cloud of gas (mainly hydrogen) and dust in interstellar space.
Binary Star
Nebula
Radio Galaxy
Galileo Galilei
33. Polish astronomer who produced a workable heliocentric model of the solar system.
Quasar
Neutron Star
Nicolaus Copernicus
Electromagnetic Spectrum
34. 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.
Retrograde
Redshift
Light Year
Neutron Star
35. Type of active galaxy whose emissions come from a very small region within the nucleus of an otherwise normal-looking spiral system.
Seyfert Galaxy
Cepheid Variable
Meteor
Sunspots
36. The small - dense remains of a high-mass star after a supernova.
Red Giant
Calderas
Equinox
Neutron Star
37. 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
Meteor
Absorption Lines
Population I Stars
38. The older - redder stars that populate a galaxy's hale and bulge. Low metallicity.
Brown Dwarf
23:56
Population II Stars
Electromagnetic Spectrum
39. 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.
Binary Star
Nebula
300 -000 -000
Blue Giant
40. The younger stars - some of which are blue - that populate a galaxy's disk - especially its spiral arms. High in heavy metals.
Population I Stars
Red Giant
Cepheid Variable
Newton's Laws
41. A narrow - bright region of the spectrum - produced when electrons in atoms jump from one energy level to a lower energy level.
Emission Line
Population I Stars
Ecliptic Plane
White Dwarf
42. 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