PSU ASTRO 7N REVISION TEST UPDATED EXAM
QUESTIONS AND ANSWERS GRADED A+
✔✔A comet's nucleus is composed of: - ✔✔dust, dry ice, and water ice
✔✔The material is a meteorite is - ✔✔roughly as old as the Solar System
✔✔What was Kepler's first law? - ✔✔Planets revolve around the sun in elliptical orbits
with Sun at one focus of the ellipse.
✔✔What best describes the orbit of earth around the Sun - ✔✔An eclipse that is close
to being circular
✔✔Which of the following does Kepler's Second Law support? - ✔✔When a planet is
closer to the Sun, its speed is greater than when it is farther away.
✔✔How did Kepler himself originally state his second law? - ✔✔A line joining a planet
and the Sun sweeps out equal areas in equal intervals of time.
✔✔What was Kepler's Third Law? - ✔✔The square of the time period for an orbit of a
planet is proportional to its average distance from the Sun (in other words P^2 is
proportional to a^3)
✔✔Saturn is about 10 times as far from the Sun as Earth is (a = 10 AU, roughly). About
how many times does the Earth orbit the Sun in the time it takes Saturn to orbit just
once? - ✔✔About 30
✔✔Besides, the discovery that moons orbit Jupiter, what other discovery made by
Galileo Galilei, with an early telescope, proved that the Earth is not at the center of the
Universe? - ✔✔the phases of Venus
✔✔We saw that Kepler's 3rd law states that P^2/a^3 = constant. What does P represent
in this equation? - ✔✔orbital period, in this care how long it takes for a satellite to orbit
Jupiter
✔✔Of the four Galilean moons which is the closest to Jupiter? - ✔✔Lo
✔✔Which moon of Jupiter is believed to have a liquid ocean beneath a layer of ice? -
✔✔Europa
✔✔Which moon of Jupiter is the largest? - ✔✔Ganymede
, ✔✔Which of these following statements can be said about Venus? - ✔✔Venus has a
very slow speed of rotation. Venus is closer to the Sun than the Earth is. (Only A and C
are true)
✔✔Which among the following scenarios will be true for someone watching the sky from
the Venus surface? - ✔✔The Sun would rise in the west and set in the east
✔✔Craters on Venus: - ✔✔are about the same in size and structure to those on Earth,
Moon, and Mars.
✔✔Volcanoes on Venus - ✔✔produce very large lava flows that cover at least 85% of
the planet's surface
✔✔Where do mountains on Earth come from? - ✔✔In some locations, plates of rock on
the planets surfaces press together and the plates rise together
✔✔From what we described, where are aurorae likely to be see most frequently - ✔✔At
locations near the poles
✔✔What is NOT true about Earth's atmosphere? - ✔✔It has more Carbon Dioxide than
Venus, so is heated more than Venus by the Greenhouse effect.
✔✔What is ozone? - ✔✔Three oxygen atoms bonded together into a single molecule
(O3)
✔✔What would happen if the ozone layer were completely destroyed? - ✔✔UV
radiation from the Sun would get through the atmosphere and cause damage to life
✔✔Why is Venus's day so long (a day-night cycle on Venus lasts for as long as 243
Earth day and night cycles)? - ✔✔Venus's rotation time is very long compared to the
time it takes to go once around the Sun.
✔✔The Greenhouse effect: - ✔✔larger on Venus than on Earth
✔✔Which two Terrestrial planets have the least amount of atmosphere? - ✔✔Mercury
and Mars
✔✔The densities of the four Terrestrial planets are similar to each other. This means -
✔✔they are made of similar substances
✔✔Which of the following is not a characteristics of Jovian Planets - ✔✔They have a
higher density than terrestrial planets
✔✔Which planet has a moon with many sulfur volcanoes - ✔✔Jupiter
QUESTIONS AND ANSWERS GRADED A+
✔✔A comet's nucleus is composed of: - ✔✔dust, dry ice, and water ice
✔✔The material is a meteorite is - ✔✔roughly as old as the Solar System
✔✔What was Kepler's first law? - ✔✔Planets revolve around the sun in elliptical orbits
with Sun at one focus of the ellipse.
✔✔What best describes the orbit of earth around the Sun - ✔✔An eclipse that is close
to being circular
✔✔Which of the following does Kepler's Second Law support? - ✔✔When a planet is
closer to the Sun, its speed is greater than when it is farther away.
✔✔How did Kepler himself originally state his second law? - ✔✔A line joining a planet
and the Sun sweeps out equal areas in equal intervals of time.
✔✔What was Kepler's Third Law? - ✔✔The square of the time period for an orbit of a
planet is proportional to its average distance from the Sun (in other words P^2 is
proportional to a^3)
✔✔Saturn is about 10 times as far from the Sun as Earth is (a = 10 AU, roughly). About
how many times does the Earth orbit the Sun in the time it takes Saturn to orbit just
once? - ✔✔About 30
✔✔Besides, the discovery that moons orbit Jupiter, what other discovery made by
Galileo Galilei, with an early telescope, proved that the Earth is not at the center of the
Universe? - ✔✔the phases of Venus
✔✔We saw that Kepler's 3rd law states that P^2/a^3 = constant. What does P represent
in this equation? - ✔✔orbital period, in this care how long it takes for a satellite to orbit
Jupiter
✔✔Of the four Galilean moons which is the closest to Jupiter? - ✔✔Lo
✔✔Which moon of Jupiter is believed to have a liquid ocean beneath a layer of ice? -
✔✔Europa
✔✔Which moon of Jupiter is the largest? - ✔✔Ganymede
, ✔✔Which of these following statements can be said about Venus? - ✔✔Venus has a
very slow speed of rotation. Venus is closer to the Sun than the Earth is. (Only A and C
are true)
✔✔Which among the following scenarios will be true for someone watching the sky from
the Venus surface? - ✔✔The Sun would rise in the west and set in the east
✔✔Craters on Venus: - ✔✔are about the same in size and structure to those on Earth,
Moon, and Mars.
✔✔Volcanoes on Venus - ✔✔produce very large lava flows that cover at least 85% of
the planet's surface
✔✔Where do mountains on Earth come from? - ✔✔In some locations, plates of rock on
the planets surfaces press together and the plates rise together
✔✔From what we described, where are aurorae likely to be see most frequently - ✔✔At
locations near the poles
✔✔What is NOT true about Earth's atmosphere? - ✔✔It has more Carbon Dioxide than
Venus, so is heated more than Venus by the Greenhouse effect.
✔✔What is ozone? - ✔✔Three oxygen atoms bonded together into a single molecule
(O3)
✔✔What would happen if the ozone layer were completely destroyed? - ✔✔UV
radiation from the Sun would get through the atmosphere and cause damage to life
✔✔Why is Venus's day so long (a day-night cycle on Venus lasts for as long as 243
Earth day and night cycles)? - ✔✔Venus's rotation time is very long compared to the
time it takes to go once around the Sun.
✔✔The Greenhouse effect: - ✔✔larger on Venus than on Earth
✔✔Which two Terrestrial planets have the least amount of atmosphere? - ✔✔Mercury
and Mars
✔✔The densities of the four Terrestrial planets are similar to each other. This means -
✔✔they are made of similar substances
✔✔Which of the following is not a characteristics of Jovian Planets - ✔✔They have a
higher density than terrestrial planets
✔✔Which planet has a moon with many sulfur volcanoes - ✔✔Jupiter
