What defines the habitable zone around a star?
A) the region around a star where rocky planets can form
B) the region around a star where humans can survive
C) the region around a star where liquid water can exist on planetary surfaces
D) the region around a star where its ultraviolet radiation is too weak to destroy biological organisms on a planetary surface
E) the region around a star outside of its hot, tenuous corona
C) the region around a star where liquid water can exist on planetary surfaces
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Light travels faster in
A) thin air. B) dense air. C) same in each.
Mercury is larger than Earth's Moon but smaller than Earth
a. True b. False Indicate whether the statement is true or false
Lithosphere
What will be an ideal response?
The Sun is actually more luminous at sunspot minimum than at maximum
Indicate whether the statement is true or false