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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. Change in the apparent frequency of a wave as observer and source move toward or away from each other
planetesimal
milky way galaxy
parallax
doppler effect
2. Radiation left over from the beginning of the universe
perigee
terrestrial planet
background radiation
red giant
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
comet
pulsar
apogee
4. A spectrum of light in which there are no gaps - so that each region blends directly into the next
big bang theory
continuous spectrum
geocentric
Jovian planet
5. The decrease in wavelength of light due to an object moving away from the oberver
light-year
blue shift
supergiant
protostar
6. The luminous cloud of particles surrounding the frozen nucleus of a comet
Claudius Ptolemy
neutron star
rotation
coma
7. The distance between crests of waves - such as those of the electromagnetic spectrum
absolute magnitude
Nicolaus Copernicus
quasar
wavelength
8. A system of two stars that revolve around each other under their mutual gravitation
doppler effect
red shift
binary star
pulsar
9. Optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece
refracting telescope
moon
white dwarf
precession
10. A group of stars that form a pattern in the sky
absorption spectrum
constellation
Hubble's law
nebula
11. Light distance travels in one year (9.5 trillion km)
Jovian planet
neutron star
light-year
main-sequence star
12. Point in orbit that is closest to the sun - planet moves faster
heliocentric
perhelion
comet
nebula
13. An immense cloud of gas (mainly hydrogen) and dust in interstellar space
Jovian planet
nebula
background radiation
coma
14. A system of galaxies containing from several to thousands of member galaxies
galaxy cluster
terrestrial planet
blue shift
lunar eclipse
15. Influenced by Copernicus; Built observatory and collected data on the locations of stars and planets for over 20 years
nebula
Tycho Brahe
apogee
absolute magnitude
16. A system of galaxies containing from several to thousands of member galaxies
blue shift
perhelion
solar eclipse
galaxy cluster
17. A contracting cloud of gas and dust with enough mass to form a star
protostar
meteroid
planetesimal
red shift
18. The small - dense remains of a high-mass star after a supernova
neutron star
Sir Isaac Newton
wavelength
coma
19. A rapidly spinning neutron star that produces radio waves
absorption spectrum
astronomical unit (AU)
nebula
pulsar
20. The rainbow effect when light is dispersed through lens
chromatic abberation
refracting telescope
nebulae
phases of the moon
21. The study of the universe
reflecting telescope
astronomy
aphelion
cepheid variable
22. An enormously bright - distant galaxy with a giant black hole at its center
perhelion
nova
planet
quasar
23. A group of about 30 galaxies that includes the Milky Way
local group
neutron star
astronomy
white dwarf
24. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources
nebula
terrestrial planet
astronomy
radio telescope
25. The brightness of a star when viewed from Earth
meteor
perigee
supernova
apparent magnitude
26. Any natural satellite of a planet
moon
aphelion
light-year
white dwarf
27. A galaxy with a bulge in the middle and arms that spiral outward in a pinwheel pattern
spiral galaxy
Hubble's law
Galileo Galilei
binary star
28. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune
meteroid
Jovian planet
universal gravitation
planet
29. A graph relating the temperature and brightness of stars
doppler effect
red shift
Hertzsprung-Russel Diagram
Sir Isaac Newton
30. 23.5° - the reason we have seasons
31. A measure of the amount of light that a star actually emits
absolute magnitude
spiral galaxy
elliptical galaxy
spiral galaxy
32. The theory that states that gravity will over come the expansion of the universe and bring everything together in an implosion
binary star
Claudius Ptolemy
phases of the moon
the big crunch
33. Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)
Nicolaus Copernicus
emission spectrum
constellation
electromagnetic spectrum
34. A space telescope and camera named for a famous astronaut (Edward Hubble) used to study space elements
neutron star
aphelion
quasar
Hubble Space Telescope
35. A star that falls into the main sequence category on the H-are diagram
refracting telescope
red shift
continuous spectrum
main-sequence star
36. A variable star that brightens and dims regularly - or pulses - and whose distance can be determined from its period of pulsation
spectroscopy
cepheid variable
meteor
white dwarf
37. An enormously bright - distant galaxy with a giant black hole at its center
coma
pulsar
absorption spectrum
quasar
38. 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
nebulae
comet
rotation
quasar
39. The apparent change in position of an object when seen from different places
elliptical galaxy
Jovian planet
irregular galaxy
parallax
40. Radiation left over from the beginning of the universe
background radiation
Johannes Kepler
nova
chromatic abberation
41. The place in the orbit of a planet where the planet is farthest from the sun
planet
refracting telescope
apogee
aphelion
42. Large group of stars - dust - and gas held together by gravity; can be elliptical - spiral - or irregular
galaxy
phases of the moon
white dwarf
neutron star
43. The formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
accretion
element
Kuiper Belt
Galileo Galilei
44. Massive clouds of dust and gases where stars are born
chromatic abberation
nebulae
parallax
equinox
45. The increase in wavelength of light due to an object moving away from the observer
red shift
nebula
ellipse
chromatic abberation
46. Remnant of a star that is so dense that nothing - not even light - can escape its gravity field
black hole
reflecting telescope
perigee
galaxy cluster
47. Chunk of rock or dust in space
lunar eclipse
Hertzsprung-Russel Diagram
meteroid
red dwarf
48. Planets with low densities and are huge gas giants. Jupiter - Saturn - Uranus - Neptune
cepheid variable
Jovian planet
background radiation
moon
49. A spherical region of comets that surrounds the solar system
electromagnetic spectrum
Oort Cloud
moon
rotation
50. Explained movement of planets with retrograde motion
supergiant
Hubble's law
reflecting telescope
Claudius Ptolemy