• Question 1 of 10

    The _______________ is the Sun and the objects that are traveling around it.

    • milky way
    • solar system
    • Earth star system
    • Kepler asteroid belt
  • Question 2 of 10

    How many planets do we know of that orbit the sun?

    • 7
    • 8
    • 9
    • 10
  • Question 3 of 10

    A moving object has the tendency to keep moving in a straight line. We call this property:

    • inertia
    • gravity
    • first law of motion
    • momentum
  • Question 4 of 10

    Small rocky objects that are found in a belt between the orbits of Jupiter and Mars are called:

    • meteors
    • asteroids
    • comets
    • meteorites
  • Question 5 of 10

    Planets travel around the Sun in a path called a(n) ____________.

    • epicycle
    • satellite trajectory
    • elliptical pull
    • orbit
  • Question 6 of 10

    Which planet is about the same size (same radius) as the Earth?

    • Mercury
    • Mars
    • Saturn
    • Venus
  • Question 7 of 10

    The amount of light and warmth a planet receives per square meter depends on:

    • how big the planet is
    • how fast the planet is spinning
    • how far the planet is from the sun
    • how long the planet takes to revolve around the sun
  • Question 8 of 10

    The planet that is closest to the sun is:

    • Mercury
    • Venus
    • Mars
    • Uranus
  • Question 9 of 10

    All of the inner planets are made from generally the same materials.

    • True
    • False
  • Question 10 of 10

    Comets consist of both organic and inorganic compounds:

    • True
    • False