- According to one of Kepler's laws, a planet is moving fastest in its orbit when it is at
- focus.
- you can't fool me; planets move at constant speeds.
- perihelion.
- apheilion.

- The fact that Earth's seasons are not of equal length (summer is a few days longer than winter), and our knowledge of Kepler's second law, allows us to predict that
- the Earth is farther from the Sun in winter.
- the Earth is farther from the Sun in summer.
- the Earth is moving fastest in its orbit during summer.
- none of these statements follow from the facts given.

- The Moon makes one complete circuit around the Earth in about a month. What kind of motion is being described by the Moon?
- rotation
- revolution
- retrograde
- transgressional

- Sunspots seem to move across the face of the Sun in a matter of days. What kind of spinning motion is the Sun undergoing?
- rotation
- revolution
- retrograde
- transgressional

- A planet at perihelion is
- as close to the Earth as it ever gets.
- as far from the Earth as it ever gets.
- as close to the Sun as it ever gets.
- as far from the Sun as it ever gets.

- According to Kepler's second law, in equal times the orbit of each planet sweeps out equal areas. Combined with Kepler's first law, this results in planets that
- move in retrograde paths around one focus of the Sun.
- move fastest when they are closest to the Sun.
- rotate in a certain, specific rate of speed.
- none of these is a result of Kepler's laws.

- When a superior planet is exactly 180 degrees from the Sun in the sky, astronomers say it is at
- opposition
- conjunction
- quadrature
- minimum elongation

- The time it takes a planet to complete one orbit around the Sun is called its
- maximum elongation.
- hyperbolic period.
- period of rotation.
- period of revolution.

- Kepler found that the orbits of the planets were not perfect circles, but rather ____.
- hyperbolas
- parabolas
- perihelia
- ellipses

Which orbit has the greatest eccentricity?- Moe
- Larry
- Curley

Which orbit has the largest aphelion?- Moe
- Larry
- Curley

Which orbit has an aphelion and perihelion that are equal?- Moe
- Larry
- Curley

Which orbit has an eccentricity nearest zero (0)?- Moe
- Larry
- Curley

- Kepler's _____ law says that the planets orbit the Sun in ellipses, with the Sun at one focus.
- First
- Second
- Third
- Universal Law of Gravity

- Kepler's _____ law says that the line joining the Sun and a planet sweeps equal areas in equal times.
- First
- Second
- Third
- Universal Law of Gravity

- Kepler's _____ law says that the square of the period of revolution is proportional to the cube of the planet's average distance from the Sun.
- First
- Second
- Third
- Universal Law of Gravity

- This Greek philosopher (around 350 B.C.) thought that the Earth was at the center of the universe.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- This 16th century Polish astronomer became famous for his theory that the Sun was at the center of the universe and that the Earth moved.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- This man calculated the correct size of the Earth in about 250 B.C.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- This 19th century French physicist used a pendulum to prove that the Earth moves.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- In the early 17th century, this man helped to prove the heliocentric theory by using a telescope to discover four large moons around Jupiter and the phases of Venus.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- This mathematician used Tycho's observations of the planets to develop his own "Laws of Planetary Motion" in the early 17th century.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- In the 17th century this great scientist discovered the "Laws" that describe gravity. He was born the same year the Galileo died.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- This 2nd century astronomer used an Earth-centered model with circles-on-circles (epicycles) to explain the motion of the planets.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- This 16th century Danish observer of the planets lost part of his nose in a sword fight.
- Aristotle
- Copernicus
- Eratosthenes
- Galileo
- Kepler
- Newton
- Ptolemy
- Tycho
- Foucault

- Newton's first law is also known as the law of _____.
- Inertia
- Universal Law of Gravity
- Law of sines
- Action-Reaction Law

- Newton's _____ law can be written: F = ma.
- First
- Second
- Third
- Universal Gravity

- Newton's _____ law says that for every action there is an equal and opposite reaction.
- First
- Second
- Third
- Universal Gravity

- Newton's _____ law says that things continue moving in a straight line at a constant speed unless acted on by an outside force.
- First
- Second
- Third
- Universal Gravity