©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Erth 101 Exam Questions With Correct
Answers
The elements of the periodic table were formed in - answer✔the big bang event, interiors of
stars, and supernovas
earth's mantle is composed of - answer✔almost entirely solid rock
main building blocks of earth's crust minerals - answer✔silica tetrahedra SiO4)4-
ocean crust is primarily composed of - answer✔basalt
earth age - answer✔4.55 billion years
homo sapiens time on earth - answer✔160k yrs
how many stars in the milky way - answer✔300 billion
how many galaxies in the visible universe - answer✔100 billion
asteroid belt location - answer✔Between Mars and Jupiter
oort cloud - answer✔A spherical region of comets that surrounds the solar system
big bang - answer✔13.8 billion years ago, produced mainly H, He, and Li
heavier elements of periodic table made from - answer✔inside of stars
1|Page
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ALL RIGHTS RESERVED.
stars formed by - answer✔gravitational collapse of interstellar gas and dust
heaviest elements made - answer✔during supernovas
crust mantle boundary type - answer✔compositional
lithosphere asthenosphere boundary type - answer✔rheological
mantle is - answer✔solid, peridotite or ultramafic
outer core is - answer✔liquid
inner core is - answer✔solid
oceanic crust - answer✔5 km, high dens
continental crust - answer✔45 km, low dens
Isostasty - answer✔The equilibrium between continental crust and the denser mantle below it
asteroid - answer✔any of numerous small celestial bodies composed of rock and metal that
move around the sun (mainly between the orbits of Mars and Jupiter)
reasons for continental drift/wegener - answer✔Fit of the continents
Evidence of past glaciations in rocks/landforms that are now at the equator, suggesting these
parts of continents were once near the south pole
Distribution of climatic belts is consistent with his continent reconstructions
Same fossilized species on different continents
2|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Matching rock types/ages on continent margins
How is Earth's magnetic field generated? - answer✔Produced by convection of liquid iron in the
outer core
The seafloor was mapped during and after WWII and revealed: - answer✔Abyssal plains
Mid-ocean ridges
Seamounts and guyots
Trenches
Fracture zones
what does seafloor rock (basalt) reveal about earths magnetic field - answer✔polarity reversals
are recorded in the rocks
where is new crust created - answer✔mid ocean ridges
what happens to old crust - answer✔destroyed/recycled at subduction zones
basalt - answer✔A dark, dense, igneous rock with a fine texture, found in oceanic crust
peridotite - answer✔Dense, dark igneous rock that makes up the mantle.
granite - answer✔A usually light colored igneous rock that is found in continental crust
nebular hypothesis of planet formation - answer✔the earth and sun formed from the same
cloud of dust and gas
3|Page
ALL RIGHTS RESERVED.
Erth 101 Exam Questions With Correct
Answers
The elements of the periodic table were formed in - answer✔the big bang event, interiors of
stars, and supernovas
earth's mantle is composed of - answer✔almost entirely solid rock
main building blocks of earth's crust minerals - answer✔silica tetrahedra SiO4)4-
ocean crust is primarily composed of - answer✔basalt
earth age - answer✔4.55 billion years
homo sapiens time on earth - answer✔160k yrs
how many stars in the milky way - answer✔300 billion
how many galaxies in the visible universe - answer✔100 billion
asteroid belt location - answer✔Between Mars and Jupiter
oort cloud - answer✔A spherical region of comets that surrounds the solar system
big bang - answer✔13.8 billion years ago, produced mainly H, He, and Li
heavier elements of periodic table made from - answer✔inside of stars
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
stars formed by - answer✔gravitational collapse of interstellar gas and dust
heaviest elements made - answer✔during supernovas
crust mantle boundary type - answer✔compositional
lithosphere asthenosphere boundary type - answer✔rheological
mantle is - answer✔solid, peridotite or ultramafic
outer core is - answer✔liquid
inner core is - answer✔solid
oceanic crust - answer✔5 km, high dens
continental crust - answer✔45 km, low dens
Isostasty - answer✔The equilibrium between continental crust and the denser mantle below it
asteroid - answer✔any of numerous small celestial bodies composed of rock and metal that
move around the sun (mainly between the orbits of Mars and Jupiter)
reasons for continental drift/wegener - answer✔Fit of the continents
Evidence of past glaciations in rocks/landforms that are now at the equator, suggesting these
parts of continents were once near the south pole
Distribution of climatic belts is consistent with his continent reconstructions
Same fossilized species on different continents
2|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Matching rock types/ages on continent margins
How is Earth's magnetic field generated? - answer✔Produced by convection of liquid iron in the
outer core
The seafloor was mapped during and after WWII and revealed: - answer✔Abyssal plains
Mid-ocean ridges
Seamounts and guyots
Trenches
Fracture zones
what does seafloor rock (basalt) reveal about earths magnetic field - answer✔polarity reversals
are recorded in the rocks
where is new crust created - answer✔mid ocean ridges
what happens to old crust - answer✔destroyed/recycled at subduction zones
basalt - answer✔A dark, dense, igneous rock with a fine texture, found in oceanic crust
peridotite - answer✔Dense, dark igneous rock that makes up the mantle.
granite - answer✔A usually light colored igneous rock that is found in continental crust
nebular hypothesis of planet formation - answer✔the earth and sun formed from the same
cloud of dust and gas
3|Page
