Mini-Quiz: Influence of Gravitation in the Universe

1. How were galaxies and stars formed?

   They were created when the Big Bang occurredSorry, not correct. Try another button. Gravitation separated objects into distinct galaxies and starsGood try, but not right. Select another answer. The force of gravitation clumped masses of material togetherCorrect. You understand gravitation in the Universe.

2. What causes the bulge at the Earth's equator?

   Gravitation from the Sun causes the bulgeOops! Wrong answer. Re-read the question and try again. The rotation of the Earth on its axis creates an outward force at the equatorThat is Correct. You are improving. The extreme heat at the equator causes material to expandSorry, not correct. Try another button.

3. Why do stars revolve around the center of a galaxy?

   Gravitation stabilized the initial motion of the stars into orbitsCorrect. You understand gravitation in the Universe. Scientists think it has something to do with gravityGood try, but not right. Select another answer. Otherwise they would fly off into spaceOops! Wrong answer. Re-read the question and try again.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.