Q.1
What is obliquity?
  • The measure of the tilt of the Earth
  • The change in the shape of Earth’s orbit around the sun
  • The change in the orientation of Earth’s axis
  • The measure of solar intensity of the sun
Q.2
What is inertia?
  • amount of atoms
  • amount of gravitational pull
  • the size
  • resistance to a change in motion
Q.3
A year on Jupiter is 4,days long. This tells you how long it takes
  • Jupiter to rotate one time on its axis.
  • Earth to orbit Jupiter.
  • Jupiter to orbit the sun
  • the sun to orbit Jupiter
Q.4
Who was Kepler?
  • Scientist
  • German Astronomer and mathematician
Q.5
The period of geostationary artificial satellite is
  • 6 hours
  • 12 hours
  • 24 hours
  • 48 hours
Q.6
Earth's spinning on its axis is called its _____________.
  • orbit
  • rotation
Q.7
The study of space
  • Astronomy
  • Meteorology
  • Galaxy
  • Geology
Q.8
Kepler’s third law states
  • The semimajor axis is equal to the planet’s average distance from the sun
  • None of these answers is correct
  • The square of the orbital period of a planet is proportional to its orbital radius
  • The orbit of a planet around the sun is an ellipse, with the sun at one focus
Q.9
When the earth is closest to the sun
  • the sun will have the biggest apparent diameter and the greatest gravitational attraction
  • the sun will have the biggest apparent diameter and the smallest gravitational attraction
Q.10
When a planet orbits the Sun, one of the foci of the elliptical orbit is
  • the axis
  • the perihelion
  • the center
  • the Sun
Q.11
Planets revolve around the sun in elliptical orbits
  • Law of Periods
  • Law of orbits
  • Law of Areas
  • None of these
Q.12
How fast does the earth revolve around the sun?
  • 15 degrees per hour
  • 1 degree per hour
  • 1 degree per day
  • 15 degrees per day
Q.13
What is Kepler's 3rd Law?
  • Law of Areas
  • Law of Periods
  • Law of Orbits
  • None of these
Q.14
What is his nationality
  • Chinese
  • Turkish
  • German
  • Russian
Q.15
Which planet has the least eccentric orbit?
  • Venus
  • Mars
  • Earth
  • Mercury
Q.16
What is Kepler's 2nd Law?
  • Law of Orbits
  • Law of Periods
  • Law of Areas
  • None of these
Q.17
What is Kepler's 1st Law?
  • Law of Areas
  • Law of Periods
  • Law of Orbits
  • All of above
Q.18
Unit of 'G' is
  • N-m2/kg
  • N-m/kg2
  • N-m2/kg2
  • N-m/kg
Q.19
'G' is called
  • acceleration due to gravity
  • gravity
  • gravitational constant
  • gravitational force
Q.20
When the distance between two objects increases the gravitational force between them
  • decreases
  • increases
  • no change
  • None of these
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