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ASTRO 7N Exam 1 QUESTIONS AND 100% DETAILED
ANSWERS
What time is it for the little green figure on Earth if Earth is
rotating counterclockwise? - ANSWER-6:00 am
A mountain top is a good location for optical telescopes
because the site... - ANSWER-is above much of the
atmosphere
What time is the waxing crescent moon directly overhead -
ANSWER-3:00 pm
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The moon has about 1/100th the mass of Earth and 1/4th
the radius. What is the surface gravity of the moon
compared to Earth? - ANSWER-16/100
An emission line is produced when - ANSWER-an electron
passes from a higher to a lower energy level
Of the following types of radiation, which has the highest
frequency? - ANSWER-X-rays
The spectrum of an oxygen lamp looks different than the
spectrum of a sodium lamp because: - ANSWER-each
atom has a unique set of electron orbits
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Which statement about the rotation of the inner planets is
true? - ANSWER-Venus rotates in the opposite direction
from the three others
The sun formed.. - ANSWER-at the center of a spinning
disk made of gas and dust
Keplers first law - ANSWER-The planets orbit the Sun in
elliptical orbits with the Sun at one focus.
- These ellipses tend to be nearly circular for the planets in
our Solar System
Distance between earth and sun - ANSWER-1
"Astronomical Unit" (1 AU)
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heliocentric model - ANSWER-Based on the belief that the
sun is the center of the universe
- replaced geocentric model (earth centered)
Kelper's second law - ANSWER-"A line joining a planet
and its star sweeps out equal areas during equal intervals
of time."
- Or, a planet's speed is fastest when the planet is closest
to the Sun (at a point called perihelion), and slowest when
it is farthest away (aphelion)
Keplers third law - ANSWER-P 2 = a 3, where P is the
orbital period (a planet's year, given as a multiple of Earth
ASTRO 7N Exam 1 QUESTIONS AND 100% DETAILED
ANSWERS
What time is it for the little green figure on Earth if Earth is
rotating counterclockwise? - ANSWER-6:00 am
A mountain top is a good location for optical telescopes
because the site... - ANSWER-is above much of the
atmosphere
What time is the waxing crescent moon directly overhead -
ANSWER-3:00 pm
,2|Page
The moon has about 1/100th the mass of Earth and 1/4th
the radius. What is the surface gravity of the moon
compared to Earth? - ANSWER-16/100
An emission line is produced when - ANSWER-an electron
passes from a higher to a lower energy level
Of the following types of radiation, which has the highest
frequency? - ANSWER-X-rays
The spectrum of an oxygen lamp looks different than the
spectrum of a sodium lamp because: - ANSWER-each
atom has a unique set of electron orbits
,3|Page
Which statement about the rotation of the inner planets is
true? - ANSWER-Venus rotates in the opposite direction
from the three others
The sun formed.. - ANSWER-at the center of a spinning
disk made of gas and dust
Keplers first law - ANSWER-The planets orbit the Sun in
elliptical orbits with the Sun at one focus.
- These ellipses tend to be nearly circular for the planets in
our Solar System
Distance between earth and sun - ANSWER-1
"Astronomical Unit" (1 AU)
, 4|Page
heliocentric model - ANSWER-Based on the belief that the
sun is the center of the universe
- replaced geocentric model (earth centered)
Kelper's second law - ANSWER-"A line joining a planet
and its star sweeps out equal areas during equal intervals
of time."
- Or, a planet's speed is fastest when the planet is closest
to the Sun (at a point called perihelion), and slowest when
it is farthest away (aphelion)
Keplers third law - ANSWER-P 2 = a 3, where P is the
orbital period (a planet's year, given as a multiple of Earth
