Astronomy Practice Test
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A practice test for 8th grade astronomy!
- 1.
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The first part of this chart is a/an _____________. - 2.The second part is a/an __________.
- 3.The third part is a/an __________.
- 4.The fourth part is a/an __________.
- 5.The fifth part is a/an __________.
- 6.The sixth part is a/an __________.
- 7.The seventh part is a/an __________.
- 8.The ninth part is a/an __________.
- 9.The tenth part is a/an __________.
- 10.The eleventh part is a/an __________.
- 11.Which side of the chart is for low mass stars?
- A.
The bottom
- B.
Both
- C.
Neither
- D.
The top
- 12.Which part of the chart is for high mass stars?
- A.
The bottom
- B.
Both
- C.
Niether
- D.
The top
- 13.As the protostar contracts, the core temperature reaches 10,000,000 degrees c, and ______ begins, causing it to become a star.
- 14.What color is a low to medium-mass star?
- A.
Blue
- B.
Yellow
- 15.What color is a high-mass star?
- A.
Blue
- B.
Yellow
- 16.What two things to fusion create?
- A.
Carbon and helium
- B.
Carbon and radient energy
- C.
Oxygen and helium
- D.
Radient energy and helium
- E.
Radient energy and oxygen
- 17.Stars expand because gravity balences out the energy production.
- A.
True
- B.
False, stars don't expand.
- C.
False, stars expand because gravity doesn't balence out the energy production.
- 18.What is a hot and dense core of matter remains?
- A.
Black dwarfs
- B.
Supernovas
- C.
White dwarfs
- D.
Stars
- 19.What is a supernova?
- A.
A stage of star causing the star to contract
- B.
An explosion that blows the star apart
- 20.What does a white dwarf become when it stops glowing?
- A.
A nova
- B.
A black dwarf
- C.
A nebula
- 21.Often, a white dwarf will not cool quietly, it will have repeated explosions called __________.
- 22.A high-mass star ends its cycle by becoming a...
- A.
Neutron star or black whole
- B.
A white dwarf or black dwarf
- C.
A black dwarf or a black hole
- D.
A neutron star or a white dwarf
- 23.Compare and contrast the two types of telescopes.
- 24.A radio telescope is a ______.
- 25.What type of telescope makes the best large telescopes?
- 26.What color star is our sun?
- A.
Blue
- B.
Red
- C.
Yellow
- D.
Violet
- 27.What is the temperature of our sun? (in celcius of course)
- A.
3000
- B.
5000
- C.
2000
- D.
100
- 28.Hottest stars are 20,000 degrees and are
- A.
Red
- B.
Blue
- C.
Green
- D.
Violet
- E.
White
- 29.Describe apparent and actual motion.
- 30.Circumpolar stars are
- A.
Stars that are far away from the star Polaris, and therefore are seen all year round.
- B.
Stars that are close to the star Polaris, and therefore are seen all year round.
- C.
Nebulas that are formed near the star Polaris.
- D.
Stars that are named after Polaris.
- 31.How can we tell tgat stars are moving?
- 32.Stars moving towards the earth have ________ shift because the wavelengths are smaller.
- A.
Red
- B.
Blue
- C.
Violet
- D.
White
- 33.Distances in space are measureid in light years which is _________ km/sec.
- A.
300000
- B.
200000
- C.
100000
- D.
30000
- 34.It takes ____ minutes for light to get from the sun to our earth.
- 35.Explain parallax.
- 36.Name the two things that the visibility of a star depends on.
- A.
Distance from the earth and size
- B.
Brightness and size
- C.
Temperature and distance from the earth
- D.
Distance from the earth and brightness
- 37.How bright a star appears when viewed from earth is called it's __________.
- 38.The dimmeststars have low # aooarebt magnitutes.
- A.
True
- B.
False
- 39.The sun's apparent magnitude is ________.
- 40._____________ is how bright stars would appear if they were all the same distance frrom the earth.
- 41.Is the sun's absolute magnitude more or less than it's apparent magnitude?
- A.
Less, it would be moved further away.
- B.
More, it would be moved further away.
- C.
Less, it would be moved closer.
- D.
More, it would be moved closer.
- 42.
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In the H-R diagram that is attached, in what two ways are the stars classified?- A.
Temperature, absolute magnitude
- B.
Brightness, temperature
- C.
Size, brightness
- D.
Temberature, size
- 43.In the main sequence, the ________ increases as the temperature increases.
- 44.Why are white dwarfs and supergiants exceptions to the main sequence?
- 45.Put the types of light waves in order based on size and give a brief description of each.
- 46.The instrument that separates visible light into its wavelengths is a
- A.
Telescope
- B.
Spectroscope
- C.
Sunglasses
- 47.Red has the longest wavelength and _____ has the shortest.
- 48.Each element, when heated, emites energy at a specific wavelengh. They only produce part of the sprectrum. This is called a
- 49.Why do we care what colors we see through the spectroscope?
- 50.What is inertia?
- A.
The tendancy of an object in motion to continue in motion in a straight line unless affected by an outside force.
- B.
The force that attracts objects towards eachother.
- 51.Perihelion is the point in the earth;s orbit when it is furthest from the sun.
- A.
True
- B.
False
- 52.Describe why we have seasons and the two things that this causes.
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