How did discovering the KBOs demote Pluto's planetary status?
What will be an ideal response?
If Pluto were to be considered a major planet, then many Kuiper Belt Objects are almost as big as Pluto, also orbit the Sun, some of them have moons also, and most are in more circular orbits closer to the ecliptic, behaving more like planets than Pluto does. Should they not also have been counted as planets as well?
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State a testable prediction of the nebular theory that has been confirmed by observations of extrasolar planets. Does this confirmation mean the theory is completely correct?
What will be an ideal response?
About how old is Earth?
a. 6000 years b. 1 million years c. 1 billion years d. 5 billion years e. 14 billion years
Where is the newest material in the Earth's crust found?
What will be an ideal response?
Monochromatic light hits a piece of glass. Assuming the frequency remains constant, what happens to the wavelength in the glass as the index of refraction decreases?
a. decreases c. increases b. approaches 3 × 10^8 m d. remains constant