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Test your basic knowledge |
Astronomy Basics
Start Test
Study First
Subject
:
science
Instructions:
Answer 50 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. Galaxy with no particular shape - contains new & old stars
irregular galaxy
Hubble Space Telescope
accretion
pulsar
2. The average distance between the Earth and the sun - or approximately 150000000 km
big bang theory
astronomical unit (AU)
pulsar
main-sequence star
3. Explained movement of planets with retrograde motion
constellation
evolution
Claudius Ptolemy
lunar eclipse
4. A graph relating the temperature and brightness of stars
Halley's Comet
perigee
nova
Hertzsprung-Russel Diagram
5. All of the frequencies or wavelengths of electromagnetic radiation
red giant
binary star
red shift
electromagnetic spectrum
6. The small - dense remains of a high-mass star after a supernova
equinox
cepheid variable
neutron star
retrograde motion
7. The brightness of a star when viewed from Earth
supergiant
Galileo Galilei
elliptical galaxy
apparent magnitude
8. The luminous cloud of particles surrounding the frozen nucleus of a comet
absolute magnitude
nova
apparent magnitude
coma
9. Any substance that cannot be broken down into simpler substances
element
Hertzsprung-Russel Diagram
absorption spectrum
solstace
10. A particle of electromagnetic radiation having zero mass and carrying a quantum of energy
photon
reflecting telescope
quasar
galaxy cluster
11. Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)
Nicolaus Copernicus
meteroid
earth's tilt
geocentric
12. The brightness of a star when viewed from Earth
red shift
moon
geocentric
apparent magnitude
13. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune
light-year
blue shift
protostar
Jovian planet
14. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
perhelion
binary star
geocentric
wavelength
15. Change in the apparent frequency of a wave as observer and source move toward or away from each other
element
reflecting telescope
doppler effect
Nicolaus Copernicus
16. A model of the solar system in which Earth and the other planets revolve around the sun
supernova
constellation
lunar eclipse
heliocentric
17. When the moon passes between earth and the sun - blocking the sunlight from reaching earth
big bang theory
solar eclipse
quasar
spiral galaxy
18. The decrease in wavelength of light due to an object moving away from the oberver
equinox
astronomical unit (AU)
rotation
blue shift
19. An extremely bright star of very large diameter and low density
Galileo Galilei
Nicolaus Copernicus
equinox
supergiant
20. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)
equinox
meteroid
Johannes Kepler
parallax
21. A large body in space that orbits a star and does not produce light of its own
perigee
apparent magnitude
planet
galaxy cluster
22. Light distance travels in one year (9.5 trillion km)
continuous spectrum
light-year
ellipse
Sir Isaac Newton
23. The spinning of Earth on its axis
rotation
red shift
apparent magnitude
supernova
24. A group of about 30 galaxies that includes the Milky Way
Oort Cloud
apogee
spectroscopy
local group
25. A large cloud of dust and gas that can break apart into smaller pieces and form stars
doppler effect
nebula
binary star
equinox
26. The farther away a galaxy is - the faster it is moving away
27. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation
quasar
accretion
evolution
cepheid variable
28. 23.5° - the reason we have seasons
29. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune
meteor
spiral galaxy
Jovian planet
accretion
30. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.
31. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
Hubble's law
white dwarf
universal gravitation
spiral galaxy
32. Optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece
black hole
rotation
Hubble's law
refracting telescope
33. Point in orbit that is closest to the sun - planet moves faster
asteroid
nebulae
accretion
perhelion
34. A system of two stars that revolve around each other under their mutual gravitation
red shift
binary star
aphelion
red shift
35. The apparent westward motion of the planets with respect to the stars
retrograde motion
earth's tilt
aphelion
galaxy cluster
36. The most distant point in the orbit of the moon
absorption spectrum
reflecting telescope
apogee
nebula
37. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
red shift
Hubble's law
absorption spectrum
galaxy cluster
38. Stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
milky way galaxy
doppler effect
terrestrial planet
meteorite
39. Point of moon's orbit when it is nearest the earth
wavelength
perigee
nebula
perhelion
40. A spherical region of comets that surrounds the solar system
protostar
nebula
Oort Cloud
chromatic abberation
41. The study of the spectra of stars by analyzing the spectral properties of the light they give off
comet
spectroscopy
solstace
nebulae
42. The theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature
earth's tilt
big bang theory
chromatic abberation
asteroid
43. Any substance that cannot be broken down into simpler substances
absolute magnitude
continuous spectrum
element
Johannes Kepler
44. A spectrum of light in which there are no gaps - so that each region blends directly into the next
Sir Isaac Newton
parallax
light-year
continuous spectrum
45. The most distant point in the orbit of the moon
apogee
Kuiper Belt
parallax
comet
46. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
accretion
nova
lunar eclipse
emission spectrum
47. The two days of the year on which neither hemisphere is tilted toward or away from the sun
equinox
accretion
photon
white dwarf
48. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field
light-year
black hole
doppler effect
absolute magnitude
49. A graph relating the temperature and brightness of stars
Hertzsprung-Russel Diagram
Nicolaus Copernicus
lunar eclipse
red giant
50. A region of the solar system that is just beyond the orbit of neptune and that contains small bodies made mostly of ice
phases of the moon
Kuiper Belt
coma
planetesimal