The Circular Shape of the Earth's Shadow on the Moon

question 21

Multiple Choice

The circular shape of the Earth's shadow on the Moon during a lunar eclipse suggested to the Greeks that the Earth was

• A) cylindrical in shape
• B) at the center of the Universe
• C) flat
• D) spherical in shape

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Definitions:

Musculocutaneous

Relating to both muscles and the skin, or a nerve in the arm that innervates the front muscles of the upper arm and the skin of the forearm.

Radial

Pertaining to structures spreading out in all directions from a central point or axis.

Ulnar

Pertaining to the ulna, one of the two long bones in the forearm, located on the side opposite the thumb.

Ulnar

Pertaining to the ulna, one of the two long bones in the forearm, located on the side opposite to the thumb.