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