Midterm 1 - Quiz 7

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Midterm Quizzes & Trivia

This explores basic concepts of Venus.


Questions and Answers
  • 1. 

    The orbit of Venus is such that its angular distance from the Sun is never more than 47 degrees.  As a consequence:

    • A.

      It can only be seen during full daylight.

    • B.

      It is generally visible during the 2 to 3 hours just after sunset or just before sunrise.

    • C.

      It is generally visible during the 1 to 2 hours just after sunset or just before sunrise.

    • D.

      It can only be seen during total solar eclipses.

    • E.

      None of the above

    Correct Answer
    B. It is generally visible during the 2 to 3 hours just after sunset or just before sunrise.
    Explanation
    The orbit of Venus is such that its angular distance from the Sun is never more than 47 degrees. This means that Venus is always relatively close to the Sun in the sky. As a result, it is generally visible during the 2 to 3 hours just after sunset or just before sunrise when the Sun is below the horizon and Venus is still visible. This is because Venus is either ahead of or behind the Sun in its orbit, allowing it to be seen during these twilight hours.

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  • 2. 

    The rotation axis of Venus is almost perfectly at right angles to the plane of its orbit.  As a consequence Venus' seasons:

    • A.

      Are similar to seasons on Earth.

    • B.

      Are more extreme than seasons on Earth.

    • C.

      Are almost non-existent (much less seasonal differences than on Earth).

    • D.

      None of the above

    Correct Answer
    C. Are almost non-existent (much less seasonal differences than on Earth).
    Explanation
    The rotation axis of Venus being almost perfectly at right angles to the plane of its orbit means that there is very little tilt in Venus' axis compared to Earth. This lack of tilt results in minimal seasonal differences on Venus, making the seasons almost non-existent. Therefore, the correct answer is that Venus' seasons are almost non-existent, with much less seasonal differences than on Earth.

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  • 3. 

    Because the rotation of Venus is "retrograde":

    • A.

      Like the Moon, Venus shows only one "face" to the Earth.

    • B.

      Like Mercury, Venus shows only one "face" to the Sun.

    • C.

      It turns in the opposite direction (on its axis) in comparison to the rotation of the Earth (on its axis).

    • D.

      All of the above

    • E.

      None of the above

    Correct Answer
    C. It turns in the opposite direction (on its axis) in comparison to the rotation of the Earth (on its axis).
    Explanation
    The correct answer is "it turns in the opposite direction (on its axis) in comparison to the rotation of the Earth (on its axis)." This is because Venus has a retrograde rotation, meaning it rotates from east to west, opposite to the rotation of the Earth. This is unique among the planets in our solar system.

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  • 4. 

    The fact that the rotation of Venus is "retrograde":

    • A.

      Was deduced by watching patterns in the cloud layers of Venus.

    • B.

      Was deduced by watching patterns in the surface of Venus.

    • C.

      Was deduced watching the seasonal variations of the polar ice caps.

    • D.

      Was deduced using "Doppler broadening" of radar echoes from the surface.

    • E.

      None of the above

    Correct Answer
    D. Was deduced using "Doppler broadening" of radar echoes from the surface.
    Explanation
    The correct answer is "was deduced using 'Doppler broadening' of radar echoes from the surface." This means that scientists were able to determine the retrograde rotation of Venus by studying the Doppler broadening effect in radar echoes from the surface. This technique involves analyzing the changes in frequency and wavelength of the radar signals reflected from Venus, which provided evidence of the planet's unusual rotation direction. The other options mentioned, such as watching cloud patterns, surface patterns, or seasonal variations of the polar ice caps, are not directly related to deducing the retrograde rotation of Venus.

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  • 5. 

    Unlike Earth's atmosphere with water (droplet) clouds, Venus clouds are made from:

    • A.

      Dry ice

    • B.

      Sulfuric acid droplets

    • C.

      Ozone droplets

    • D.

      All of the above

    • E.

      None of the above

    Correct Answer
    B. Sulfuric acid droplets
    Explanation
    The correct answer is sulfuric acid droplets. Venus has a thick atmosphere composed mainly of carbon dioxide, with clouds made of sulfuric acid droplets. These clouds are responsible for the planet's highly reflective nature, causing it to appear very bright in the sky. The presence of sulfuric acid droplets in Venus' atmosphere is due to various chemical reactions occurring in the atmosphere, making it different from Earth's atmosphere which contains water droplet clouds.

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  • 6. 

    Surface details on Venus are mainly observed using:

    • A.

      Satellites with orbits below the cloud layers.

    • B.

      Radar "images" from Earth and the Magellan space craft.

    • C.

      From Russian "landers" that reached the surface of Venus.

    • D.

      All of the above

    • E.

      None of the above

    Correct Answer
    B. Radar "images" from Earth and the Magellan space craft.
    Explanation
    The correct answer is radar "images" from Earth and the Magellan space craft. This is because the surface details on Venus are mainly observed using radar technology. Satellites with orbits below the cloud layers can only observe the atmosphere, while Russian landers reached the surface but did not provide extensive surface detail. Therefore, the most reliable method for studying the surface details on Venus is through radar "images" obtained from Earth and the Magellan spacecraft.

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  • 7. 

    The surface details of Venus show:

    • A.

      Fewer "continent" like elevated regions than the Earth.

    • B.

      About the same fraction of "continent" like elevated regions and lower "ocean" like regions as the Earth.

    • C.

      More "continent" like elevated regions than the Earth.

    Correct Answer
    A. Fewer "continent" like elevated regions than the Earth.
    Explanation
    The explanation for the given correct answer is that the surface details of Venus have fewer "continent" like elevated regions compared to the Earth. This means that Venus has less landmass and more flat, low-lying areas resembling an ocean-like surface. This is in contrast to the Earth, which has more elevated regions resembling continents.

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  • 8. 

    The largest "continent" like region on Venus, called "Aphrodite Terra" is about the size of:

    • A.

      Europe

    • B.

      Africa

    • C.

      Asia

    • D.

      Lake Superior

    • E.

      None of the above

    Correct Answer
    B. Africa
    Explanation
    Aphrodite Terra, the largest "continent" like region on Venus, is about the size of Africa. This means that it is larger than Europe, Asia, and Lake Superior. Africa is known for its vast land area, diverse ecosystems, and numerous countries, making it a suitable comparison for the size of Aphrodite Terra.

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  • 9. 

    Radar images from the Magellan satellite suggest:

    • A.

      A clear evidence for plate tectonics on Venus.

    • B.

      One or two isolated examples for plate tectonics on Venus.

    • C.

      Litttle or no evidence for plate tectonics on Venus.

    Correct Answer
    C. Litttle or no evidence for plate tectonics on Venus.
    Explanation
    The radar images from the Magellan satellite suggest little or no evidence for plate tectonics on Venus. This means that the images did not show any significant geological activity or movement of the Venusian crust, which is a key characteristic of plate tectonics. Therefore, it can be concluded that there is little or no evidence supporting the presence of plate tectonics on Venus based on these radar images.

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  • 10. 

    Venus is known for its large number of:

    • A.

      Impact craters

    • B.

      Volcanoes

    • C.

      Rift valleys

    • D.

      Mountain chains

    • E.

      None of the above

    Correct Answer
    B. Volcanoes
    Explanation
    Venus is known for its large number of volcanoes. This is because Venus is a geologically active planet with a thick atmosphere and high surface temperatures, which create conditions suitable for volcanic activity. The planet's surface is covered in numerous volcanic features, including vast lava plains, volcanic domes, and shield volcanoes. The presence of these volcanoes indicates that Venus has experienced significant volcanic eruptions throughout its history, making it one of the most volcanic bodies in the solar system.

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  • 11. 

    The most common type of volcano on Venus is:

    • A.

      Cinder cones

    • B.

      Shield volcanoes

    • C.

      Composite volcanoes

    • D.

      All of the above

    • E.

      None of the above

    Correct Answer
    B. Shield volcanoes
    Explanation
    Shield volcanoes are the most common type of volcano on Venus. These volcanoes are characterized by their low, broad shape and gentle slopes. They are formed by the eruption of fluid lava that flows easily and covers large areas, creating a shield-like shape. The lava on Venus is primarily composed of basalt, which is less viscous compared to other types of lava. This allows it to flow for longer distances, resulting in the formation of shield volcanoes.

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  • 12. 

    Some of the unusual tyoe volcanoes on Venus are called:

    • A.

      Ticks

    • B.

      Domes

    • C.

      All of the above

    • D.

      None of the above

    Correct Answer
    C. All of the above
    Explanation
    The correct answer is "all of the above." This means that all the options mentioned in the question (ticks and domes) are considered unusual types of volcanoes on Venus.

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  • 13. 

    The largest volcanic structure on Venus is called:

    • A.

      Ticks

    • B.

      Domes

    • C.

      Shield volcanoes

    • D.

      Coronae

    • E.

      None of the above

    Correct Answer
    D. Coronae
    Explanation
    Coronae is the correct answer because it refers to the largest volcanic structures on Venus. These structures are characterized by a circular shape and are thought to be the result of upwelling and mantle plumes. They are different from other volcanic features like shield volcanoes, domes, and ticks, making "coronae" the most appropriate option.

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  • 14. 

    (Sugesstive) evidence for ongoing volcanism on Venus includes:

    • A.

      Short term variations in the levels of sulfur dioxide in the atmosphere.

    • B.

      Bursts if radio signals (from the surface) similar to lightning that occurs in the plumes of erupting volcanoes on Earth.

    • C.

      All of the above

    • D.

      None of the above

    Correct Answer
    C. All of the above
    Explanation
    The correct answer is all of the above. This is because both short term variations in sulfur dioxide levels in the atmosphere and bursts of radio signals similar to lightning are suggestive evidence for ongoing volcanism on Venus. These phenomena are similar to what occurs during volcanic eruptions on Earth, indicating that similar processes may be happening on Venus.

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  • 15. 

    The magnetic field on Venus is:

    • A.

      No evidence for any magnetic field on Venus.

    • B.

      Non-zero but much smaller than on Earth.

    • C.

      Similar to the magnetic field on Earth.

    • D.

      Much bigger than the magnetic field on Earth.

    Correct Answer
    A. No evidence for any magnetic field on Venus.
    Explanation
    The correct answer is "no evidence for any magnetic field on Venus." This means that there is no scientific proof or data indicating the presence of a magnetic field on Venus. Unlike Earth, which has a significant magnetic field, Venus does not exhibit any magnetic field. This information suggests that Venus lacks certain geological processes or conditions necessary for the generation of a magnetic field.

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  • 16. 

    It is suggested that the high surface temperatures on Venus are primarily the result of:

    • A.

      Being closer to the Sun than the Earth.

    • B.

      Run-way greenhouse effect.

    • C.

      Extensive and active volcanoes.

    • D.

      Remnants of planet formation.

    Correct Answer
    B. Run-way greenhouse effect.
    Explanation
    The correct answer is "run-way greenhouse effect." The high surface temperatures on Venus are primarily the result of this phenomenon. Venus has a thick atmosphere composed mainly of carbon dioxide, which traps heat from the Sun and creates a greenhouse effect. This effect is intensified on Venus due to the dense atmosphere and the presence of clouds that further contribute to the trapping of heat. As a result, Venus experiences extreme temperatures reaching up to 900 degrees Fahrenheit, making it the hottest planet in our solar system.

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