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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. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
meteroid
geocentric
quasar
nebulae
2. A contracting cloud of gas and dust with enough mass to form a star
protostar
cepheid variable
meteroid
lunar eclipse
3. A galaxy shaped like a flattened ball - containing only old stars
doppler effect
phases of the moon
elliptical galaxy
Johannes Kepler
4. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
neutron star
chromatic abberation
Oort Cloud
solstace
5. When the moon passes between earth and the sun - blocking the sunlight from reaching earth
solar eclipse
Halley's Comet
precession
emission spectrum
6. The apparent change in position of an object when seen from different places
planet
parallax
light-year
coma
7. The two days of the year on which neither hemisphere is tilted toward or away from the sun
coma
equinox
chromatic abberation
ellipse
8. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)
red shift
Hubble Space Telescope
asteroid
quasar
9. A large cloud of dust and gas that can break apart into smaller pieces and form stars
meteroid
chromatic abberation
nebula
galaxy
10. Change in the apparent frequency of a wave as observer and source move toward or away from each other
light-year
Claudius Ptolemy
geocentric
doppler effect
11. An extremely bright star of very large diameter and low density
reflecting telescope
supergiant
spiral galaxy
planetesimal
12. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
neutron star
lunar eclipse
Sir Isaac Newton
continuous spectrum
13. An extremely bright star of very large diameter and low density
supergiant
lunar eclipse
pulsar
elliptical galaxy
14. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
element
accretion
nebula
lunar eclipse
15. 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
Kuiper Belt
parallax
light-year
16. A rapidly spinning neutron star that produces radio waves
Johannes Kepler
retrograde motion
pulsar
red shift
17. A star that falls into the main sequence category on the H-are diagram
irregular galaxy
apparent magnitude
chromatic abberation
main-sequence star
18. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
chromatic abberation
absorption spectrum
parallax
red shift
19. An enormously bright - distant galaxy with a giant black hole at its center
white dwarf
astronomy
quasar
radio telescope
20. A telescope that uses a curved mirror to collect and focus light
reflecting telescope
meteor
asteroid
red giant
21. Every object in the universe was attracted to every other object w/ a force that is directly proportional to the masses and proportional to distance between them
meteorite
universal gravitation
nebula
absorption spectrum
22. The theory that states that gravity will over come the expansion of the universe and bring everything together in an implosion
protostar
parallax
the big crunch
cepheid variable
23. The luminous cloud of particles surrounding the frozen nucleus of a comet
neutron star
precession
red shift
coma
24. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
nebula
geocentric
Hubble Space Telescope
wavelength
25. Italian astronomer - mathematician - and physicist. His telescopes proved the sun is the center of the solar system and that the planets/moon move. He was persecuted for supporting Copernicus' ideas.
planet
Tycho Brahe
perigee
Galileo Galilei
26. A large body in space that orbits a star and does not produce light of its own
rotation
black hole
planet
local group
27. A model of the solar system in which Earth and the other planets revolve around the sun
cepheid variable
radio telescope
heliocentric
lunar eclipse
28. The apparent change in position of an object when seen from different places
constellation
Hubble Space Telescope
Oort Cloud
parallax
29. The brightness of a star when viewed from Earth
blue shift
asteroid
apparent magnitude
rotation
30. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.
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31. Explained movement of planets with retrograde motion
Claudius Ptolemy
element
constellation
spiral galaxy
32. A graph relating the temperature and brightness of stars
electromagnetic spectrum
absorption spectrum
Hertzsprung-Russel Diagram
Jovian planet
33. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.
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34. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular
galaxy
irregular galaxy
earth's tilt
perigee
35. The average distance between the Earth and the sun - or approximately 150000000 km
continuous spectrum
nebula
astronomical unit (AU)
cepheid variable
36. A group of stars that form a pattern in the sky
apparent magnitude
constellation
background radiation
galaxy cluster
37. The name of our galaxy - a spiral galaxy that contains about 400 billion stars
milky way galaxy
planet
doppler effect
absolute magnitude
38. The increase in wavelength of light due to an object moving away from the observer
absorption spectrum
red shift
retrograde motion
cepheid variable
39. The decrease in wavelength of light due to an object moving away from the oberver
red shift
blue shift
Tycho Brahe
accretion
40. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars
electromagnetic spectrum
terrestrial planet
universal gravitation
comet
41. The most distant point in the orbit of the moon
aphelion
Claudius Ptolemy
apogee
chromatic abberation
42. A star that falls into the main sequence category on the H-are diagram
main-sequence star
black hole
Tycho Brahe
rotation
43. The spinning of Earth on its axis
rotation
comet
main-sequence star
nebula
44. Any substance that cannot be broken down into simpler substances
element
white dwarf
red giant
absolute magnitude
45. One of the small asteroid-like bodies that formed the building blocks of the planets
moon
Tycho Brahe
planetesimal
elliptical galaxy
46. 23.5° - the reason we have seasons
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47. Light distance travels in one year (9.5 trillion km)
galaxy
pulsar
light-year
irregular galaxy
48. Explained movement of planets with retrograde motion
Galileo Galilei
solstace
aphelion
Claudius Ptolemy
49. Radiation left over from the beginning of the universe
quasar
background radiation
reflecting telescope
apogee
50. A star that ejects some of its material in the form of a cloud and become more luminous in the process
Johannes Kepler
nova
accretion
meteroid