Suppose you lived on the Moon near the center of the face that we see from Earth. At what phase of the Moon would you see sunrise? What phase of Earth would you see at this time?
What will be an ideal response?
Sunrise would occur at the Moon's first-quarter phase. You would see Earth in third-quarter phase at this time.
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In the context of supernova explosions, the _____ is a young remnant, only about 960 years old and about 9 ly in diameter
A) Lagoon Nebula B) Carina Nebula C) Eagle Nebula D) Crab Nebula
The triple alpha process requires higher temperatures to start and produces less energy for a given mass than the proton-proton chain.
Answer the following statement true (T) or false (F)
According to current theories, how did the sun's planets get here?
A) Stars such as the sun, and planets such as those around the sun, all formed shortly after the big bang, and then gathered into "solar systems" such as we see today. B) Part of the gas and dust that gathered together to form the sun went into orbit around the sun instead of falling into the sun, and this part formed the planets. C) The sun was originally part of the two-star system, the second star split up into pieces, and these pieces developed into the planets. D) A passing star tore off part of the sun, and this part separated into pieces to form the planets. E) After the sun had formed, it gathered fully-formed planets from various places as the sun moved through the galaxy.
Ocean trenches such as the Tonga and Marianas Trench, are
A) subduction zones where lithosphere is pulled down to the asthenosphere. B) some of the steepest places on Earth. C) found at continental-continental plate boundaries that mark the the deepest places on Earth.