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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 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
Oort Cloud
background radiation
spiral galaxy
big bang theory
2. The decrease in wavelength of light due to an object moving away from the oberver
apogee
Hubble's law
asteroid
blue shift
3. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years
earth's tilt
supernova
Tycho Brahe
protostar
4. The elliptical motion of a body as it orbits another body in space
apogee
evolution
Galileo Galilei
cepheid variable
5. Spectrum of electromagnetic radiation emitted by a self-luminous source
red shift
planetesimal
cepheid variable
emission spectrum
6. A star that falls into the main sequence category on the H-are diagram
Kuiper Belt
binary star
main-sequence star
galaxy cluster
7. A model of the solar system in which Earth and the other planets revolve around the sun
heliocentric
pulsar
evolution
spectroscopy
8. Varying amounts of the lighted moon as seen from earth
red dwarf
constellation
accretion
phases of the moon
9. A spherical region of comets that surrounds the solar system
earth's tilt
apparent magnitude
Oort Cloud
radio telescope
10. The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
supergiant
terrestrial planet
elliptical galaxy
absorption spectrum
11. A star that ejects some of its material in the form of a cloud and become more luminous in the process
nova
Sir Isaac Newton
white dwarf
emission spectrum
12. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
nebula
Tycho Brahe
Sir Isaac Newton
white dwarf
13. The farther away a galaxy is - the faster it is moving away
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14. A rapidly spinning neutron star that produces radio waves
pulsar
terrestrial planet
elliptical galaxy
white dwarf
15. Light distance travels in one year (9.5 trillion km)
solstace
Galileo Galilei
light-year
aphelion
16. A group of about 30 galaxies that includes the Milky Way
meteroid
precession
local group
solar eclipse
17. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
black hole
solstace
coma
meteroid
18. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field
black hole
Nicolaus Copernicus
the big crunch
earth's tilt
19. The place in the orbit of a planet where the planet is farthest from the sun
Galileo Galilei
radio telescope
parallax
aphelion
20. 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.
astronomical unit (AU)
red shift
Tycho Brahe
Galileo Galilei
21. The apparent westward motion of the planets with respect to the stars
retrograde motion
refracting telescope
apogee
radio telescope
22. Brahe's assistant - German astronomer who first discovered the three laws of planetary motion (1571-1630)
red dwarf
equinox
Johannes Kepler
electromagnetic spectrum
23. A model of the solar system in which Earth and the other planets revolve around the sun
background radiation
heliocentric
accretion
universal gravitation
24. A telescope that uses a curved mirror to collect and focus light
reflecting telescope
absolute magnitude
ellipse
milky way galaxy
25. A model of the universe based on the assumption that the sun - moon - and planets all orbit Earth
background radiation
geocentric
neutron star
pulsar
26. Massive clouds of dust and gases where stars are born
photon
supernova
nebulae
Kuiper Belt
27. The most distant point in the orbit of the moon
planet
Halley's Comet
main-sequence star
apogee
28. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources
radio telescope
the big crunch
Tycho Brahe
irregular galaxy
29. 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
retrograde motion
Kuiper Belt
universal gravitation
red shift
30. A region of the solar system that is just beyond the orbit of neptune and that contains small bodies made mostly of ice
continuous spectrum
spiral galaxy
Kuiper Belt
astronomical unit (AU)
31. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field
nova
black hole
asteroid
perhelion
32. The study of the universe
meteorite
astronomy
comet
retrograde motion
33. English mathematician and physicist - discovered the law of universal gravitation
meteor
main-sequence star
Sir Isaac Newton
solar eclipse
34. The small - dense remains of a high-mass star after a supernova
Sir Isaac Newton
neutron star
supernova
doppler effect
35. The elliptical motion of a body as it orbits another body in space
accretion
evolution
nebula
milky way galaxy
36. Point in orbit that is closest to the sun - planet moves faster
rotation
apparent magnitude
ellipse
perhelion
37. The apparent westward motion of the planets with respect to the stars
aphelion
Hertzsprung-Russel Diagram
retrograde motion
irregular galaxy
38. Planet with a solid - rocky crust; more dense; Inner planet. Mercury - Venus - Earth - Mars
terrestrial planet
Kuiper Belt
radio telescope
geocentric
39. Light distance travels in one year (9.5 trillion km)
white dwarf
reflecting telescope
light-year
equinox
40. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
spiral galaxy
rotation
milky way galaxy
Hubble Space Telescope
41. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years
lunar eclipse
red dwarf
Tycho Brahe
protostar
42. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)
asteroid
galaxy
pulsar
absolute magnitude
43. The luminous cloud of particles surrounding the frozen nucleus of a comet
electromagnetic spectrum
coma
nova
supergiant
44. When the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
galaxy
solstace
background radiation
absolute magnitude
45. A large cloud of dust and gas that can break apart into smaller pieces and form stars
evolution
nebula
Hubble Space Telescope
neutron star
46. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular
red shift
elliptical galaxy
Hubble Space Telescope
galaxy
47. Space object made of dust and rock particles mixed with frozen water - methane - and ammonia that forms a bright coma as it approaches the Sun
comet
earth's tilt
red shift
Hubble's law
48. Any substance that cannot be broken down into simpler substances
light-year
element
ellipse
Sir Isaac Newton
49. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune
Jovian planet
red dwarf
Halley's Comet
terrestrial planet
50. A very small star with low temperature - reddish in color
nebula
equinox
Jovian planet
red dwarf