# Astronomy Chapter Four

12 Questions  I  By Moonshark13

Changes are done, please start the quiz.

 1 The movement of a pool ball, after being struck by a cue, is an example of
 A. Newton's first law of motion.
 B. Newton's second law of motion.
 C. Newton's third law of motion.
 D. The universal law of gravitation.
 E. Conservation of momentum.
 2 What quantities does angular momentum depend upon?
 A. Mass and velocity
 E. Momentum and angular velocity
 3 Which of the following statements correctly describes the law of conservation of energy?
 A. An object always has the same amount of energy.
 B. Energy can change between many different forms, such as potential, kinetic, and thermal, but it is ultimately destroyed.
 C. The total quantity of energy in the universe never changes.
 D. The fact that you can fuse hydrogen into helium to produce energy means that helium can be turned into hydrogen to produce energy.
 E. It is not really possible for an object to gain or lose potential energy, because energy cannot be destroyed.
 4 How does the Space Shuttle take off?
 A. Its rocket engines push against the launch pad, propelling the shuttle upwards.
 B. By converting mass-energy to kinetic energy
 C. By achieving lift from its wings in the same way that airplanes do
 D. Hot gas shoots out from the rocket and, by conservation of momentum, the shuttle moves in the opposite direction.
 E. The hot rocket exhaust expands the air beneath the shuttle, propelling it forward.
 5 According to the universal law of gravitation, if you double the masses of both attracting objects, then the gravitational force between them will
 A. Not change at all.
 B. Increase by a factor of 2.
 C. Decrease by a factor of 2.
 D. Increase by a factor of 4.
 E. Decrease by a factor of 4.
 6 According to the universal law of gravitation, the force due to gravity is
 A. Directly proportional to the square of the distance between objects.
 B. Inversely proportional to the square of the distance between objects.
 C. Directly proportional to the distance between objects.
 D. Inversely proportional to the distance between objects.
 E. Not dependent on the distance between objects.
 7 Suppose an object is moving in a straight line at 50 mi/hr. According to Newton's first law of motion, the object will
 A. Continue to move in the same way forever, no matter what happens.
 B. Continue to move in the same way until it is acted upon by a force.
 C. Eventually slow down and come to a stop.
 D. Continue to move in a straight line forever if it is in space, but fall to the ground if it is on Earth.
 8 Considering Einstein's famous equation, E = mc2, which of the following statements is true?
 A. Mass can be turned into energy, but energy cannot be turned back into mass.
 B. It takes a large amount of mass to produce a small amount of energy.
 C. A small amount of mass can be turned into a large amount of energy.
 D. You can make mass into energy if you can accelerate the mass to the speed of light.
 E. One kilogram of mass represents 1 joule of energy.
 9 At which lunar phase(s) are tides least pronounced (e.g., the lowest high tides)?
 A. First quarter
 B. New moon
 C. Full moon
 D. Both new and full moons
 E. Both first and third quarters
 10 Where does the energy come from that your body uses to keep you alive?
 A. It is produced from the radiative energy of the Sun on your skin.
 B. It comes from the foods you eat.
 C. It comes from the water you drink.
 D. It is in the air that you breathe.
 E. It is created during the time that you rest or sleep.
 11 The allowed shapes for orbits under the force of gravity are
 A. Ellipses only.
 B. Ellipses and spirals.
 C. Ellipses, parabolas, and hyperbolas.
 D. Ellipses, spirals, and parabolas.
 E. Spirals, circles, and squares.
 12 If an object's velocity is doubled, its momentum is
 A. Halved
 B. Unchanged
 C. Doubled