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ASTR 121|56 quiz Questions Well Answered| Success Guaranteed 100%|18 Pages
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According to Alfred Weneger, which of the following is evidence of Continental Drift? Select all that apply. a. Mass extinction at several points in Earth's history b. Ice Ages c. Similar glacial scrapes in different continents d. Steady Global Warming e. Impact craters scattered all ar...

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  • August 26, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
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  • astr 121

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ASTR 121|56 quiz Questions Well
Answered
According to Alfred Weneger, which of the following is evidence of Continental Drift? Select all that
apply.



a. Mass extinction at several points in Earth's history

b. Ice Ages

c. Similar glacial scrapes in different continents

d. Steady Global Warming

e. Impact craters scattered all around the world

f. Tropical plant fossils in Greenland. - ✔ ✔ c. Similar glacial scrapes in different continents

f. Tropical plant fossils in Greenland.

Auroras on planets are generated from...

a. charged particles from sun spiraling around magnetic field lines

b. Thunder storms

c. charged particles from sun smashing into magnetic poles

d. cosmic rays trapped by magnetic field lines. - ✔ ✔ c. charged particles from sun smashing into
magnetic poles

Based on Kepler's laws, which statement is 100% true?

a. If a comet has an average distance of 100AU from the sun, we can conclude that it will take about 100
years to go around the Sun.

b. Saturn's year is 29 times longer than an Earth year. Thus the orbital path physical length
(circumference) is 29 times bigger than Earth's orbital path length

c. Jupiter sometimes moves faster than Mars in it's orbit

d. Halley's comet (75 year orbit, perihelion = 0.6AU, aphelion = 35AU) will occasionally move faster than
Venus in it's orbit.

,e. None of the listed answers (except this one) is true. - ✔ ✔ d. Halley's comet (75 year orbit,
perihelion = 0.6AU, aphelion = 35AU) will occasionally move faster than Venus in it's orbit.

Even though there are multiple ways of finding planets, there are really two methods that have found
the most planets to date. Using either of these two methods, which of the following planet
configurations would be the easiest to detect? Just to be clear, more than one configuration below
could be detected. However, I'm asking for the easiest one to spot.

a.A planet that is the size of Earth with an orbit the size of Jupiter's orbit.

b. A planet that is the size of Earth with an orbit the size of Mercury's orbit.

c. A planet that is the size of Mercury with an orbit the size of Jupiter's orbit.

d. A planet that is larger than Jupiter with an orbit the size of Pluto's orbit.

e. A planet that is the size of Jupiter with an orbit the size of Mercury's orbit. - ✔ ✔ e. A planet that is
the size of Jupiter with an orbit the size of Mercury's orbit.

From question 11, how would the gravitational force change between the Sun and Earth if the Earth was
located at 0.2AU?

a. It would increase 25 times

b. It would decrease by 1/25th

c. It would increase 2 times

d. It would increase 4 times

e. It would increase 5 times

f. It would decrease by 1/5th - ✔ ✔ a. It would increase 25 times

Given what we know about the planets in our own solar system, what could we assume about this
distant planet from the previous problem?

a. It's orbit is inclined with respect to the ecliptic.

b. It has a warm surface temperature.

c. it's day is much less than 24 hours, has many moons

d. Cannot determine it's properties

e. it's day is greater than 24 hours, has few if any moons - ✔ ✔ c. it's day is much less than 24 hours,
has many moons

, How did Eratosthenes determine the size of the Earth?

a. by observing the size of Earth's shadow on the Moon

b. by determining the density and mass of the Earth

c. by observing the lengths of shadows at different locations

d. by measuring the parallax of the moon - ✔ ✔ c. by observing the lengths of shadows at different
locations

How do we know that oxygen was not originally present on the Earth?



I.fossil record shows animals without lung like organs



II. rock record shows a significant amount of oxygen added to iron in soil. Prior to this there was none.



III. Early cells couldn't exist with oxygen present



a. I and III

b. II and III

c. II

d. III

e. I,II, III

f. I

g. I and II - ✔ ✔ b. II and III

How do we know the Earth has a liquid metallic outer core?

a. Contents of the magma from volcanoes contain liquid Iron and Nickel

b. P waves from earthquakes disappear when travelling through the core

c. This is purely theory based on the formation of magnetic fields

d. S waves from earthquakes disappear when travelling through the outer core.

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