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