Question 7 Which of the following statements regarding Venus rotation is true? It rotates in a retrograde direction compared to its orbital direction. It rotates synchronously so that one revolution around the sun is also one rotation It is tidally locked to the Sun. It does not rotate at all. Question 8 Why does Mercury have a thin layer of hydrogen and helium near its surface? These gases are released during impacts with comets. These are outgassed by rocks in Mercury's crust. Other elements move fast enough to escape Mercury's gravity. Mercury temporarily traps solar wind particles.

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