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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. The two days of the year on which neither hemisphere is tilted toward or away from the sun
evolution
neutron star
equinox
phases of the moon
2. A shift toward the red end of the spectrum in the observed spectral lines of stars or galaxies showing objects are moving away and that the universe is expanding
red shift
refracting telescope
solstace
rotation
3. A contracting cloud of gas and dust with enough mass to form a star
phases of the moon
protostar
planet
irregular galaxy
4. A large body in space that orbits a star and does not produce light of its own
nova
the big crunch
planet
nebulae
5. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
nebula
universal gravitation
perhelion
binary star
6. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources
red giant
meteor
terrestrial planet
radio telescope
7. Varying amounts of the lighted moon as seen from earth
terrestrial planet
phases of the moon
chromatic abberation
binary star
8. The farther away a galaxy is - the faster it is moving away
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9. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)
Johannes Kepler
comet
the big crunch
spiral galaxy
10. The most distant point in the orbit of the moon
Johannes Kepler
apogee
planet
nebula
11. The place in the orbit of a planet where the planet is farthest from the sun
moon
red dwarf
aphelion
astronomical unit (AU)
12. English mathematician and physicist - discovered the law of universal gravitation
background radiation
nebula
Sir Isaac Newton
Claudius Ptolemy
13. A contracting cloud of gas and dust with enough mass to form a star
element
protostar
Kuiper Belt
asteroid
14. A spherical region of comets that surrounds the solar system
Oort Cloud
Hubble Space Telescope
Hubble's law
red dwarf
15. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
red shift
astronomical unit (AU)
lunar eclipse
big bang theory
16. The distance between crests of waves - such as those of the electromagnetic spectrum
electromagnetic spectrum
wavelength
cepheid variable
white dwarf
17. A large cloud of dust and gas that can break apart into smaller pieces and form stars
nebula
big bang theory
Halley's Comet
Tycho Brahe
18. A galaxy shaped like a flattened ball - containing only old stars
apogee
red shift
meteroid
elliptical galaxy
19. An extremely bright star of very large diameter and low density
nebula
supergiant
absolute magnitude
accretion
20. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)
Johannes Kepler
meteroid
perigee
apogee
21. The brightness of a star when viewed from Earth
apparent magnitude
solstace
terrestrial planet
galaxy
22. The elliptical motion of a body as it orbits another body in space
reflecting telescope
perhelion
evolution
comet
23. Any substance that cannot be broken down into simpler substances
neutron star
continuous spectrum
phases of the moon
element
24. A system of two stars that revolve around each other under their mutual gravitation
nebula
Oort Cloud
binary star
retrograde motion
25. A faint star of enormous density
radio telescope
geocentric
white dwarf
nova
26. The apparent change in position of an object when seen from different places
solar eclipse
reflecting telescope
radio telescope
parallax
27. A system of two stars that revolve around each other under their mutual gravitation
geocentric
Hubble's law
binary star
constellation
28. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere
Jovian planet
doppler effect
meteor
rotation
29. A region of the solar system that is just beyond the orbit of neptune and that contains small bodies made mostly of ice
the big crunch
nebulae
Galileo Galilei
Kuiper Belt
30. 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
wavelength
big bang theory
asteroid
refracting telescope
31. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars
spectroscopy
retrograde motion
refracting telescope
terrestrial planet
32. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years
phases of the moon
red shift
Tycho Brahe
planetesimal
33. When the moon passes between earth and the sun - blocking the sunlight from reaching earth
terrestrial planet
solar eclipse
meteor
nebulae
34. A spectrum of light in which there are no gaps - so that each region blends directly into the next
apparent magnitude
electromagnetic spectrum
continuous spectrum
universal gravitation
35. The apparent change in position of an object when seen from different places
reflecting telescope
milky way galaxy
parallax
main-sequence star
36. The brilliant explosion of a dying supergiant star
constellation
continuous spectrum
supernova
absolute magnitude
37. Light distance travels in one year (9.5 trillion km)
universal gravitation
red giant
light-year
red shift
38. A group of about 30 galaxies that includes the Milky Way
emission spectrum
local group
phases of the moon
irregular galaxy
39. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
pulsar
spiral galaxy
chromatic abberation
absolute magnitude
40. A graph relating the temperature and brightness of stars
Oort Cloud
parallax
big bang theory
Hertzsprung-Russel Diagram
41. A very small star with low temperature - reddish in color
red dwarf
white dwarf
asteroid
solar eclipse
42. The theory that states that gravity will over come the expansion of the universe and bring everything together in an implosion
background radiation
white dwarf
moon
the big crunch
43. The average distance between the Earth and the sun - or approximately 150000000 km
astronomical unit (AU)
planet
element
electromagnetic spectrum
44. The spinning of Earth on its axis
rotation
moon
absorption spectrum
quasar
45. Galaxy with no particular shape - contains new & old stars
spiral galaxy
supergiant
irregular galaxy
photon
46. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field
doppler effect
black hole
terrestrial planet
accretion
47. Chunk of rock or dust in space
aphelion
Hertzsprung-Russel Diagram
phases of the moon
meteroid
48. A very small star with low temperature - reddish in color
red dwarf
Nicolaus Copernicus
red shift
black hole
49. Change in the apparent frequency of a wave as observer and source move toward or away from each other
universal gravitation
doppler effect
planet
electromagnetic spectrum
50. A galaxy shaped like a flattened ball - containing only old stars
meteroid
galaxy cluster
Jovian planet
elliptical galaxy