chapter 16- space

Question 1

what is the order of the planets?

Answer 1

Mercury
Venus 
Earth
Mars 
Jupiter
Saturn 
Uranus
Neptune

Question 2

How was our solar system formed?

Answer 2

4.6 billion years ago, when gravity pulls together gas and dust within a nebula to form a protostar

Question 3

how do planets and satellites stay in orbit?

Answer 3

by an inwardly acting centripetal force

Question 4

what evidence is there for the Big Bang?

Answer 4

Cosmological red-shift- Edwin Hubble shows that far away galaxies are moving further away faster than closer ones