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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. An extremely bright star of very large diameter and low density
supergiant
red giant
photon
local group
2. A star that ejects some of its material in the form of a cloud and become more luminous in the process
accretion
nova
nebulae
meteroid
3. A space telescope and camera named for a famous astronaut (Edward Hubble) used to study space elements
cepheid variable
chromatic abberation
Hubble Space Telescope
apogee
4. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
accretion
Claudius Ptolemy
planet
astronomical unit (AU)
5. An enormously bright - distant galaxy with a giant black hole at its center
nebula
cepheid variable
quasar
nebula
6. 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.
moon
supernova
Galileo Galilei
red shift
7. 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
astronomical unit (AU)
white dwarf
blue shift
universal gravitation
8. Any of the small solid extraterrestrial bodies that hits the earth's atmosphere
chromatic abberation
meteor
planetesimal
black hole
9. A measure of the amount of light that a star actually emits
meteroid
Johannes Kepler
absolute magnitude
heliocentric
10. A spherical region of comets that surrounds the solar system
Oort Cloud
galaxy
Johannes Kepler
supernova
11. Varying amounts of the lighted moon as seen from earth
precession
perigee
phases of the moon
Sir Isaac Newton
12. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars
terrestrial planet
perigee
binary star
ellipse
13. A group of stars that form a pattern in the sky
Oort Cloud
meteorite
constellation
milky way galaxy
14. A space telescope and camera named for a famous astronaut (Edward Hubble) used to study space elements
Galileo Galilei
Tycho Brahe
white dwarf
Hubble Space Telescope
15. A group of about 30 galaxies that includes the Milky Way
spectroscopy
Hubble's law
local group
meteor
16. Radiation left over from the beginning of the universe
photon
background radiation
spiral galaxy
Hertzsprung-Russel Diagram
17. The distance between crests of waves - such as those of the electromagnetic spectrum
wavelength
planetesimal
heliocentric
ellipse
18. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation
cepheid variable
geocentric
rotation
Johannes Kepler
19. English mathematician and physicist - discovered the law of universal gravitation
Claudius Ptolemy
red giant
Sir Isaac Newton
Claudius Ptolemy
20. A galaxy shaped like a flattened ball - containing only old stars
elliptical galaxy
light-year
apogee
geocentric
21. Change in the apparent frequency of a wave as observer and source move toward or away from each other
radio telescope
coma
doppler effect
local group
22. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
radio telescope
red dwarf
meteorite
geocentric
23. The average distance between the Earth and the sun - or approximately 150000000 km
solstace
supergiant
astronomical unit (AU)
red shift
24. The brilliant explosion of a dying supergiant star
apogee
supernova
protostar
light-year
25. The study of the universe
astronomy
solstace
wavelength
Halley's Comet
26. Radiation left over from the beginning of the universe
background radiation
milky way galaxy
chromatic abberation
spiral galaxy
27. The average distance between the Earth and the sun - or approximately 150000000 km
asteroid
Tycho Brahe
spiral galaxy
astronomical unit (AU)
28. A rapidly spinning neutron star that produces radio waves
supergiant
pulsar
spiral galaxy
planet
29. An elongated circle - or oval shape - the shape of the planets orbit
evolution
ellipse
aphelion
aphelion
30. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
absolute magnitude
Tycho Brahe
solstace
perhelion
31. The motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone
asteroid
apparent magnitude
precession
Tycho Brahe
32. Varying amounts of the lighted moon as seen from earth
phases of the moon
supergiant
Halley's Comet
protostar
33. The study of the universe
meteroid
refracting telescope
astronomy
continuous spectrum
34. Explained movement of planets with retrograde motion
Claudius Ptolemy
wavelength
equinox
red shift
35. A model of the solar system in which Earth and the other planets revolve around the sun
absolute magnitude
moon
galaxy
heliocentric
36. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
apparent magnitude
retrograde motion
spectroscopy
geocentric
37. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
meteroid
comet
quasar
nebula
38. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
coma
rotation
solstace
reflecting telescope
39. A telescope that uses a curved mirror to collect and focus light
reflecting telescope
supernova
continuous spectrum
aphelion
40. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
absorption spectrum
coma
Tycho Brahe
Nicolaus Copernicus
41. The luminous cloud of particles surrounding the frozen nucleus of a comet
binary star
coma
universal gravitation
red giant
42. Spectrum of electromagnetic radiation emitted by a self-luminous source
meteroid
planetesimal
element
emission spectrum
43. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular
galaxy
supergiant
geocentric
nebulae
44. The brightness of a star when viewed from Earth
red giant
perhelion
apparent magnitude
astronomical unit (AU)
45. A system of galaxies containing from several to thousands of member galaxies
perigee
galaxy cluster
background radiation
aphelion
46. A faint star of enormous density
white dwarf
supergiant
heliocentric
emission spectrum
47. English mathematician and physicist - discovered the law of universal gravitation
absorption spectrum
Sir Isaac Newton
nebulae
moon
48. A large cloud of dust and gas that can break apart into smaller pieces and form stars
geocentric
Halley's Comet
absorption spectrum
nebula
49. A rapidly spinning neutron star that produces radio waves
spectroscopy
pulsar
comet
doppler effect
50. One of the small asteroid-like bodies that formed the building blocks of the planets
main-sequence star
planetesimal
Hertzsprung-Russel Diagram
accretion