The moon's shape in the sky keeps changing with time because of its tilted orbit.
The Moon's shape in the sky keeps changing because of its ___ orbit around the Earth.
Question 6 The change in seasons on the earth occurs because (a) the distance between the earth and the sun is not constant. (b) the axis of rotation of the earth is parallel to the plane of its orbit. (c) the axis of rotation of the earth is perpendicular to the plane of its orbit. (d) the axis of rotation of the earth is tilted with respect to the plane of its orbit.