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- 1. Multiple Choice
Which of the following statements is NOT true for geostationary orbits?
The period of orbit of a geostationary orbit is one month.
The centripetal force needed for the orbit is provided by gravity.
The period of orbit for a geostationary satellite is a day.
A geostationary satellite “remains” over the same point on the Earth at all times because it is orbiting the Earth.
- 2. Multiple Choice
Kepler determined mathematical relationships describing the planets...
by applying Newton's laws to Brahe's data.
by analysing the detailed data provided by Brahe.
from the many detailed observations he made through the instruments he manufactured.
by analysing Galileo's observational data.
- 3. Multiple Choice
Newton's Law of Universal Gravitation applies...
only to planets in orbit about the Sun.
to any two objects.
only to objects near, or on, the surface of the Earth.
only to the motion of the Moon about the Earth.
- 4. Multiple Choice
What is the purpose of “G” in the Universal Gravitation formula?
“G” is a universal gravitational constant. It does not change.
"G" is a universal gravitational constant, but fluctuates depending upon the planet an object is on or is orbiting.
"G" is used to emphasize that the force is due to the Earth’s gravitational force and not a strong or weak force.
"G" is always equal to 9.81 m/s2.
- 5. Multiple Choice
What happens to the orbital velocity (ie speed) as a comet in our solar system, in an elliptical orbit, is moving closer to the Sun (ie, in close proximity)?
The orbital velocity remains the same.
The orbital velocity decreases.
The orbital velocity increases.
The orbital velocity becomes random.
- 6. Multiple Choice
A satellite is orbiting a planet with an orbital radius r. Which of the following diagrams represents the direction of the velocity and acceleration of the satellite?
- 7. Multiple Choice
What is Kepler's 1st law?
The planets orbit in an ellipse
The plants move faster when they are closer to the sun and slower when they are further from the sun
The farther a planet is from the sun the slower the orbit
(P2 = a3)
- 8. Multiple ChoiceGravity is increased with...greater mass & shorter distancegreater mass & farther distancelower mass & shorter distancelower mass & farther distance
- 9. Multiple ChoiceWhen a planet orbits the Sun, one of the foci of the elliptical orbit isthe axisthe perihelionthe centerthe Sun
- 10. Multiple ChoiceWhat is true about the area between points A, B and the Sun, and the area between points H, I and the Sun?The area between A, B and the Sun is the largest.The area between H, I and the Sun is the largestBoth areas are equal in sizeThere is not enough information to determine the areas
- 11. Multiple Choice
Ancient Greeks believed, the earth to be the centre of the universe. What do we call this model?
Copernican Model
Geocentric Universe
Heliocentric Universe
- 12. Multiple Choice
The Copernican revolution began when Copernicus suggested
a geocentric model.
a heliocentric model.
a new calendar.
a new constellation.
- 13. Multiple Choice
Tycho Brahe's biggest contribution to astronomy was...?
accurate observations of the stars and planets.
his new invention, the telescope.
his theory of a heliocentric universe.
his brass nose and bad temper.
- 14. Multiple ChoiceWho created the Universal Law of Gravitation?CopernicusNewtonKeplerGalileo
- 15. Multiple Choice
What is the purpose of “k” in Kepler's Third Law?
“k" is a universal constant. It does not change.
"k" is a universal constant, but fluctuates depending upon the planet/satellite an object is orbiting and the units used.
"k" is always 1.
"k" only applies to planets orbiting the Sun in an elliptical orbit.
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