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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 farther away a galaxy is - the faster it is moving away
2. Varying amounts of the lighted moon as seen from earth
element
Halley's Comet
absolute magnitude
phases of the moon
3. 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
big bang theory
irregular galaxy
local group
coma
4. A star that ejects some of its material in the form of a cloud and become more luminous in the process
nova
nebulae
red shift
blue shift
5. The two days of the year on which neither hemisphere is tilted toward or away from the sun
blue shift
pulsar
equinox
Halley's Comet
6. Galaxy with no particular shape - contains new & old stars
irregular galaxy
geocentric
milky way galaxy
planetesimal
7. The rainbow effect when light is dispersed through lens
parallax
perigee
Hubble Space Telescope
chromatic abberation
8. A spectrum of light in which there are no gaps - so that each region blends directly into the next
continuous spectrum
nebula
Galileo Galilei
irregular galaxy
9. Radiation left over from the beginning of the universe
asteroid
quasar
continuous spectrum
background radiation
10. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
irregular galaxy
perigee
photon
spiral galaxy
11. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)
Johannes Kepler
spiral galaxy
Halley's Comet
retrograde motion
12. A large body in space that orbits a star and does not produce light of its own
moon
parallax
refracting telescope
planet
13. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere
neutron star
continuous spectrum
meteor
reflecting telescope
14. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years
elliptical galaxy
Tycho Brahe
element
nova
15. A large cloud of dust and gas that can break apart into smaller pieces and form stars
comet
nebula
supernova
heliocentric
16. Point of moon's orbit when it is nearest the earth
reflecting telescope
white dwarf
geocentric
perigee
17. A measure of the amount of light that a star actually emits
heliocentric
heliocentric
meteor
absolute magnitude
18. The luminous cloud of particles surrounding the frozen nucleus of a comet
perhelion
astronomical unit (AU)
coma
earth's tilt
19. The apparent westward motion of the planets with respect to the stars
retrograde motion
evolution
Oort Cloud
ellipse
20. Light distance travels in one year (9.5 trillion km)
supernova
equinox
light-year
terrestrial planet
21. A model of the solar system in which Earth and the other planets revolve around the sun
heliocentric
absolute magnitude
continuous spectrum
spiral galaxy
22. English mathematician and physicist - discovered the law of universal gravitation
Sir Isaac Newton
nebula
coma
planet
23. 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.
constellation
ellipse
Galileo Galilei
retrograde motion
24. A faint star of enormous density
protostar
white dwarf
equinox
blue shift
25. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
solstace
photon
protostar
evolution
26. A graph relating the temperature and brightness of stars
Hertzsprung-Russel Diagram
Nicolaus Copernicus
white dwarf
moon
27. A measure of the amount of light that a star actually emits
electromagnetic spectrum
planetesimal
doppler effect
absolute magnitude
28. A galaxy shaped like a flattened ball - containing only old stars
phases of the moon
evolution
elliptical galaxy
meteorite
29. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
main-sequence star
nebula
Tycho Brahe
light-year
30. A system of galaxies containing from several to thousands of member galaxies
red shift
quasar
galaxy cluster
light-year
31. Optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece
spectroscopy
meteorite
refracting telescope
meteroid
32. One of the small asteroid-like bodies that formed the building blocks of the planets
apogee
planetesimal
black hole
red dwarf
33. When the moon passes between earth and the sun - blocking the sunlight from reaching earth
solar eclipse
earth's tilt
coma
rotation
34. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
planet
background radiation
perigee
geocentric
35. The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.
36. The brilliant explosion of a dying supergiant star
terrestrial planet
Hertzsprung-Russel Diagram
Johannes Kepler
supernova
37. A star that falls into the main sequence category on the H-are diagram
main-sequence star
quasar
spectroscopy
accretion
38. A system of two stars that revolve around each other under their mutual gravitation
absorption spectrum
terrestrial planet
binary star
Oort Cloud
39. The elliptical motion of a body as it orbits another body in space
Nicolaus Copernicus
elliptical galaxy
evolution
Johannes Kepler
40. 23.5° - the reason we have seasons
41. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune
quasar
elliptical galaxy
meteorite
Jovian planet
42. Any substance that cannot be broken down into simpler substances
wavelength
element
phases of the moon
nebulae
43. The increase in wavelength of light due to an object moving away from the observer
red shift
Hubble Space Telescope
Halley's Comet
Claudius Ptolemy
44. A spectrum of light in which there are no gaps - so that each region blends directly into the next
Nicolaus Copernicus
irregular galaxy
perigee
continuous spectrum
45. A space telescope and camera named for a famous astronaut (Edward Hubble) used to study space elements
meteroid
electromagnetic spectrum
Hubble Space Telescope
accretion
46. An elongated circle - or oval shape - the shape of the planets orbit
aphelion
spectroscopy
ellipse
blue shift
47. A faint star of enormous density
elliptical galaxy
quasar
absolute magnitude
white dwarf
48. The apparent westward motion of the planets with respect to the stars
pulsar
earth's tilt
rotation
retrograde motion
49. A group of stars that form a pattern in the sky
pulsar
lunar eclipse
supernova
constellation
50. Light distance travels in one year (9.5 trillion km)
meteroid
light-year
universal gravitation
equinox