Question

1. the diagram below shows the relative positions of the sun, the moon, and earth when an eclipse was observed from earth. positions a and b are locations on earths surface.

sun
moon
earth
(not drawn to scale)
which statement correctly describes the type of eclipse that was occurring and the position on earth where this eclipse was observed?
a) a lunar eclipse was observed from position a.
b) a solar eclipse was observed from position a.
c) a lunar eclipse was observed from position b.
d) a solar eclipse was observed from position b.

1. the diagram below represents four positions of the moon, labeled a through d, as it orbits earth.

(not drawn to scale)
which diagram best represents the sequence of moon phases, as seen by an observer in new york state, when the moon travels from position a to position d in its orbit around earth?
a)
b)
c)
d)

Explanation:

21.

• A solar eclipse occurs when the Moon is between the Sun and Earth, casting a shadow on Earth.
• In the diagram, position A is in the Moon's shadow. A lunar eclipse occurs when Earth is between the Sun and Moon, which is not the case here.

• When the Moon is at position A (new - moon phase from Earth's perspective as it is on the side facing away from the Sun), as it moves to B (first - quarter), then to C (full - moon, when it is opposite the Sun relative to Earth), and then to D (last - quarter).
• The sequence of phases as seen from Earth (New York State) should start with a new - moon (not visible or a thin crescent if there is some illumination due to earthshine, but in standard phase diagrams, new - moon is often represented as a dark circle), then first - quarter (half - illuminated), then full - moon (fully illuminated), and then last - quarter (half - illuminated on the opposite side).

Answer:

B. A solar eclipse was observed from position A

22.