1. The phenomena of sunrise, sunset, and the changing of seasons are caused by the motion of the Earth. The Earth's rotation on its axis causes sunrise and sunset, while its orbit around the Sun leads to the changing of seasons.

    The phenomena of sunrise, sunset, and the changing of seasons are caused by the motion of the Earth. The Earth’s rotation on its axis causes sunrise and sunset, while its orbit around the Sun leads to the changing of seasons.

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  2. Newton’s third law of motion is illustrated when a sailor jumps from a boat: the sailor exerts a forward force on the boat, causing an equal and opposite reaction force that moves the boat backward as the sailor moves forward.

    Newton’s third law of motion is illustrated when a sailor jumps from a boat: the sailor exerts a forward force on the boat, causing an equal and opposite reaction force that moves the boat backward as the sailor moves forward.

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