The Moon goes through many phases each month. These phase-changes provide evidence that the Moon revolves around Earth, similar to how the planets orbit the Sun. This constant motion is mainly controlled by- A. the Sun's gravitational force, pushing the Moon toward Earth.
B. the magnetic minerals in Earth's core, pulling the Moon toward Earth.
C. Earth's gravitational pull on the Moon.
D. convectional currents that emit radiation into space.

Hurryyy ! a student is asked to describe the path of a paper airplane that is thrown in the classroom. which statement best describes the path of the paper airplane? a. the paper airplane will move in a straight line, according to newton’s first law of motion. b. the paper airplane will drop straight to the ground once its inertia gives in to the force of gravity. c. the paper airplane will create a curved path toward the floor as it is pulled toward earth’s center. d. the paper airplane will orbit around the desk because it is the object with the largest mass in the room.

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

The layers of earth are based on what two sets of characteristics?