Video quiz - How the Universe works Flashcards
The sun started out with over 100 rocky planets. It now has only 4. What happened to the others?
They collided with one of the 4 existing planets and added their mass together
Why do rocky planets condense close to the Sun and gas planets condense at a distance?
Rock has a higher melting temperature and turns solid closer to the Sun
How many years ago did the Earth form with about 100 small planets orbiting our new Sun?
4.5 billion years ago
What happened to some of the small deadly chunks of rock ejected as planets collided in the early solar system
The Gravity of Jupiter swept the debris from the asteroid belt
What is the leading theory explaining why Mars has a thinner crust in the Northern Hemisphere
Mars was hit by a micro planet years ago
How did the astronauts “see” solar Wind? Solar Wind is broken pieces of atom ejected from the Sun by nuclear fusion.
They closed their eyes and observed flashes as particles ripped through their skulls
The process where dust particles combine and grow into planets is called…
Accretion
