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EOSC FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS 2025/2026

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EOSC FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS 2025/2026 How old is the universe? - ANSWERS13.8 billion years old How did the universe begin? - ANSWERSBig Bang Theory How old is the oldest rock? - ANSWERS4 billion years old How old is the Earth? - ANSWERS4.6 billion years old Wh...

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  • February 19, 2025
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  • 2024/2025
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EOSC FINAL EXAM QUESTIONS WITH
COMPLETE SOLUTIONS 2025/2026

How old is the universe? - ANSWERS13.8 billion years old



How did the universe begin? - ANSWERSBig Bang Theory



How old is the oldest rock? - ANSWERS4 billion years old



How old is the Earth? - ANSWERS4.6 billion years old



What are inner and terrestrial planets? - ANSWERSMercury, Venus, Earth, Mars



Inner Planets (Terrestrial Planets) - ANSWERSRocky and iron-rich cores and silicate rich, solid
surfaces (mercury, Venus, earth and mars)



Mercury - ANSWERSthe smallest planet and the nearest to the sun



Venus - ANSWERSSimilar to earth in diameter and dominated by volcanic landforms



What's so bad about Venus? - ANSWERSSurface pressure - 91 times earth - equivalent to 1km
deep in ocean. Surface temperature 460C and 300km/h winds laced with droplets of sulfuric
acid



Why is the surface of Venus hotter than the surface or mars? - ANSWERSVenus has a thick CO2
atmosphere acting like a green house

,Mars - ANSWERSFrozen CO2 ice caps. Evidence for liquid water in the past. Thin CO2-rich
atmosphere - cold (-60C), dry



Outer planets - ANSWERSAre all has (or ice) giants, having ring systems and have many satellites



What planets are Jovian planets (outer planets) - ANSWERSJupiter, Saturn, Uranus, Neptune



Jupiter - ANSWERSlargest planet, composed dominantly of hydrogen and helium. No solid
surface



Saturn - ANSWERSProminent ring system (ice, rocks and dust), 62 known satellites, rocky core,
metallic hydrogen layer giving magnetic field, ammonia in the atmosphere giving the yellow
color



Uranus - ANSWERSIce giant, rocky/icy interior, atmosphere contains H, He, H2O, ammonia and
methane, coldest atmosphere in the solar system (-225C), tilted axis of rotation (almost
90degrees off the other planets)



Neptune - ANSWERSIce giant, rocky/icy interior, atmosphere contains H, He, N, H2O, ammonia
and methane, active visible weather patterns



dwarf planet - ANSWERSAn object that orbits the sun and is spherical, but has not cleared the
area of its orbit.



Pluto - ANSWERSDiscovered in 1930, then demoted to dwarf in 2006



Ceres - ANSWERSDiscovered in 1801 - the largest object in the asteroid belt between mars and
Jupiter

, Drake Equation - ANSWERSan equation that lays out the factors that play a role in determining
the number of communicating civilizations in our galaxy



How did Earth form? - ANSWERSCosmic dust. Hot, molten sphere. Debris from formation of Sun
bombarded Earth: cooled, elements within it separated into layers based on mass



Earth's interior - ANSWERScrust, mantle, core



How do we measure gravity? - ANSWERSG.R.A.C.E.

Gravity recovery and climate experiment



What is isostasy? - ANSWERSgravitational and buoyant equilibrium between the asthenosphere
and the lithosphere



Is gravity lower or higher than average over Hudson's bay? - ANSWERSHudson Bay has less
gravity than the rest of the world



isostatic rebound - ANSWERSSlow process of Earths crust rising as the result of the removal of
mass from the crust.



Earth's magnetic field - ANSWERSMagnetic lines of force from Earth's polar north and south,
acting like a giant magnet.



magnetic inclination - ANSWERSThe angle between the magnetic fields force line and the
surface of the earth



Where is the Earth's magnetic field generated? - ANSWERSouter core

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