Astro 7N UPDATED ACTUAL Exam
Questions and CORRECT Answers
Say that there were a planet X in our solar system with a mass 1/4 the mass of Earth and a radius
1/2 the radius of Earth. How will the gravity on its surface compare to the surface gravity of
Earth? - CORRECT ANSWER - Surface gravity on planet X is the same as on Earth
If the frequency of radiation is twice as large, then its wavelength is... - CORRECT
ANSWER - half as large
Which planet would have the shortest day and the longest year? - CORRECT ANSWER -
A planet that rotates rapidly on its axis and slowly orbits the Sun
A particular Zodiac constellation is high in the sky at midnight in April. Where will it be in
October? - CORRECT ANSWER - Near the sun in daytime sky
When does the New Moon rise? - CORRECT ANSWER - 6 hours before noon (sunrise)
In what ways does a 30 meter telescope outperform a 10 meter telescope? - CORRECT
ANSWER - Its images are 9 times brighter than a 10 meter (if you triple the width then
r^2=9)
Consider a planet whose rotation axis is NOT tilted with respect to its orbital plane. What are the
seasons like on this planet? - CORRECT ANSWER - There are no seasons
Radio waves can travel large distances without interference because... - CORRECT
ANSWER - they have longer wavelengths than visible light
Why don't we see the constellation Orion all year? - CORRECT ANSWER - As the Earth
orbits the Sun, its nighttime side points to the different constellations at different points along its
orbit.
, What effect does pollution have on the view of sunsets. - CORRECT ANSWER - Mutes
the color of the sunset
In the picture above, Spectrum A does not match spectrum B. Which of the following is true? -
CORRECT ANSWER - Spectrum A uses the wrong chemical element in the box
How much of the total surface area of the Moon is illuminated by Sunlight during the Full Moon
phase? - CORRECT ANSWER - One half
A __________ telescope uses __________ to focus light. - CORRECT ANSWER -
refracting/lenses and reflecting/mirrors
Which of the following types of light travels at the fastest speed? - CORRECT
ANSWER - All light generally travels at the same speed
The energy and frequency increase, while the wavelength decrease, as you more from... -
CORRECT ANSWER - radio waves, microwaves, infrared, visible light, ultraviolet, x-
rays, gamma rays
Which phase is the moon in the diagram above. - CORRECT ANSWER - waxing gibbous
What color does a sunset cause scenery to take on before the sun sets, and right after the sunsets?
- CORRECT ANSWER - golden before and blue after
Why can working with silhouettes be good for beginning photographers? - CORRECT
ANSWER - sharpen your skills as a photographer
Saturn has about 100 times the mass of Earth and 10 times the radius. What is the surface gravity
of Saturn compared to Earth? - CORRECT ANSWER -1
Questions and CORRECT Answers
Say that there were a planet X in our solar system with a mass 1/4 the mass of Earth and a radius
1/2 the radius of Earth. How will the gravity on its surface compare to the surface gravity of
Earth? - CORRECT ANSWER - Surface gravity on planet X is the same as on Earth
If the frequency of radiation is twice as large, then its wavelength is... - CORRECT
ANSWER - half as large
Which planet would have the shortest day and the longest year? - CORRECT ANSWER -
A planet that rotates rapidly on its axis and slowly orbits the Sun
A particular Zodiac constellation is high in the sky at midnight in April. Where will it be in
October? - CORRECT ANSWER - Near the sun in daytime sky
When does the New Moon rise? - CORRECT ANSWER - 6 hours before noon (sunrise)
In what ways does a 30 meter telescope outperform a 10 meter telescope? - CORRECT
ANSWER - Its images are 9 times brighter than a 10 meter (if you triple the width then
r^2=9)
Consider a planet whose rotation axis is NOT tilted with respect to its orbital plane. What are the
seasons like on this planet? - CORRECT ANSWER - There are no seasons
Radio waves can travel large distances without interference because... - CORRECT
ANSWER - they have longer wavelengths than visible light
Why don't we see the constellation Orion all year? - CORRECT ANSWER - As the Earth
orbits the Sun, its nighttime side points to the different constellations at different points along its
orbit.
, What effect does pollution have on the view of sunsets. - CORRECT ANSWER - Mutes
the color of the sunset
In the picture above, Spectrum A does not match spectrum B. Which of the following is true? -
CORRECT ANSWER - Spectrum A uses the wrong chemical element in the box
How much of the total surface area of the Moon is illuminated by Sunlight during the Full Moon
phase? - CORRECT ANSWER - One half
A __________ telescope uses __________ to focus light. - CORRECT ANSWER -
refracting/lenses and reflecting/mirrors
Which of the following types of light travels at the fastest speed? - CORRECT
ANSWER - All light generally travels at the same speed
The energy and frequency increase, while the wavelength decrease, as you more from... -
CORRECT ANSWER - radio waves, microwaves, infrared, visible light, ultraviolet, x-
rays, gamma rays
Which phase is the moon in the diagram above. - CORRECT ANSWER - waxing gibbous
What color does a sunset cause scenery to take on before the sun sets, and right after the sunsets?
- CORRECT ANSWER - golden before and blue after
Why can working with silhouettes be good for beginning photographers? - CORRECT
ANSWER - sharpen your skills as a photographer
Saturn has about 100 times the mass of Earth and 10 times the radius. What is the surface gravity
of Saturn compared to Earth? - CORRECT ANSWER -1
