DOC PREVIEW
MIT AST 101 - AST 101 Exam 3

This preview shows page 1-2-3 out of 10 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 10 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 10 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 10 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 10 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

Astronomy 101, Exam #3 GName___________________________________________________________________No notes, No books; You can use calculators; Pick the best answer for each question.Constants that you may need to know:c = 3 x 108 m/s 1 AU = 1.49 ×1011 meters 1 light year = 9.46 × 1015 metersh = 6.626 x 10-34 J●s mass of Earth = 5.97 × 1024 kg mass of Sun = 1.99 x 1030 kgG = 6.67 × 10-11 m3 kg-1 s-2mass of Moon = 7.35 x 1022 kg mass of Jupiter = 1.90 x 1027 kgg = 9.8 m/s2radius of Earth = 6.38 × 106 m radius of Jupiter = 7.15 × 107 mσ = 5.67 x 10-8 W m-2 K-41 nm = 1 x 10-9 meters radius of Moon = 1.74 × 106 m 1) Assume that 239U has a half-life of 23 minutes and decays into 239Np. You initially startwith 200 grams of pure 239U. How many grams of 239U will you have in 46 minutes?A) 25 gramsB) 50 gramsC) 75 gramsD) 100 gramsE) 12.5 grams2) If you date all these following sets of objects, which of them would you expect to havethe oldest formation (crystallization) ages on average?A) Ten random meteorites from asteroidsB) Ten random meteorites from the MoonC) Ten random igneous rocks from the EarthD) Ten random metamorphic rocks from the EarthE) Ten random sedimentary rocks from the Earth3) Assume that 40K has a half-life of 1.25 x 109 years and decays into either 40Ar or 40Ca. You initially start with 1,000 grams of pure 40K. How many grams of 40K will you have in 2.5 x 109 years? A) 50 gramsB) 100 gramsC) 125 gramsD) 250 gramsE) 500 gramsAstronomy 101, Exam #3 G4) Which is true about P- and S-waves?A) P-waves cannot travel through liquids while S-waves cannot travel throughsolid material.B) P-waves can travel through liquids while S-waves cannot travel through solidmaterial.C) P-waves can travel through liquids while S-waves cannot travel throughliquids.D) P-waves cannot travel through solid material while S-waves cannot travelthrough liquids.E) S-waves travel faster through a solid than P-waves.5) Who was the first person to walk on the Moon?A) Buzz AldrinB) Stan LoveC) Neil ArmstrongD) Tom JonesE) John Glenn6) A large portion of the Moon’s surface was thought to be completely molten. Thismolten part of the Moon was called a …A) Igneous SillB) Lava SeaC) VolcanoD) Magma OceanE) Pangea7) Why is part of the core of the Earth thought to be liquid?A) P-waves cannot pass through the coreB) The density of the Earth is larger than the MoonC) The Earth must have incorporated a large abundance of liquid helium when itformedD) S-waves cannot pass through the coreE) Volcanoes in the Earth allow water to sink to the core8) The interstellar cloud that formed the Sun was primarily …A) oxygen and siliconB) nitrogen and heliumC) hydrogen and heliumD) hydrogen and carbonAstronomy 101, Exam #3 GE) iron and silicon9) Which planet has the smallest density?A) MercuryB) SaturnC) UranusD) MarsE) Venus10) Which gas is considered a greenhouse gas? A) Xe B) I C) He D) CO2 E) N211) The two most abundant elements in Saturn are … A) oxygen and carbon. B) iron and hydrogen. C) nitrogen and oxygen. D) hydrogen and helium. E) iron and helium.12) Which is an expected difference between a sample from the Lunar Highlands anda sample of mare from Mare Imbrium?A) The sample of the Lunar Highlands will be more pyroxene-richB) The sample of the Lunar Highlands will be darkerC) The sample of the Lunar Highland will be denserD) The sample of the Lunar Highlands will be more aluminum-rich.E) The sample of the Lunar Highlands will have a younger formation age.13) Which of these objects could potentially produce the largest Doppler shifts on thespectral lines of a star?A) A planet with the mass of Earth that is 10 AU from the starB) A planet with the mass of Earth that is 1 AU from the star C) A planet with the mass of Jupiter that is 0.1 AU from the star D) A planet with a mass that is ten times that of Jupiter that is 1 AU from thestarAstronomy 101, Exam #3 GE) A planet with a mass that is ten times that of Jupiter that is 0.5 AU fromthe star 14) What types of rocks are found on the surface of the Earth? A) just igneous rocks B) just sedimentary rocks C) just metamorphic rocks D) igneous, metamorphic, and sedimentary rocks E) just metamorphic and sedimentary rocks15) Plate tectonics describes …A) the large scale motions of Earth's lithosphere.B) the large scale motions of Earth's asthenosphere.C) The convection in the Earth’s coreD) The capture of charged particles in the Van Allen Radiation beltsE) The formation of the Moon’s crust16) Which is not true about the Earth’s atmosphere?A) protects life on Earth by absorbing ultraviolet solar radiationB) warms the surface of the Earth through heat retention C) reduces temperature extremes between day and night.D) Contains more oxygen than argonE) Contains more carbon dioxide than oxygen17) The mission to discover Earth-like planets is called the …A) Apollo missionB) Kepler missionC) Newton missionD) Einstein missionE) Copernicus mission18) Why are Jupiter-sized planets easier to discover around other stars than Earth-sized planets using the Doppler method?A) Jupiter-sized planets have extensive ring systemsB) Jupiter-sized planets eject material into their starC) The higher masses of Jupiter-sized planets tend to produce smallergravitational forces on stars than Earth-like planets at the same distancesto the starAstronomy 101, Exam #3 GD) Jupiter-sized planets produce tremendous amount of radio waves that canbe detected from EarthE) The higher masses of Jupiter-sized planets tend to produce largergravitational forces on stars than Earth-like planets at the same distance tothe starAstronomy 101, Exam #3 G19) Which is not a difference between terrestrial planets and Jovian planets?A) Terrestrial planets are closer to the Sun than Jovian planetsB) Terrestrial planets have more moons than Jovian planetsC) Jovian planets have rings while terrestrial planets do not have ringsD) Terrestrial planets have larger densities than Jovian planetsE) Jovian planets are primarily gaseous while terrestrial planets are primarilyrocky20) Which object has


View Full Document

MIT AST 101 - AST 101 Exam 3

Documents in this Course
SYLLABUS

SYLLABUS

92 pages

Exam #1

Exam #1

8 pages

Exam 3

Exam 3

10 pages

Exam 4

Exam 4

10 pages

Exam #3

Exam #3

10 pages

Exam #2

Exam #2

13 pages

Syllabus

Syllabus

104 pages

Exam 3

Exam 3

10 pages

Load more
Download AST 101 Exam 3
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view AST 101 Exam 3 and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view AST 101 Exam 3 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?