Chapter 12
Astronomy A Self-Teaching Guide · 5 exercises
Problem 2
Briefly summarize the scientific theory of the evolution of intelligent life on Earth from simple one-celled organisms.__________________________________________________________________
5 step solution
Problem 3
Explain why the first search for life on another planet was conducted on Mars.__________________________________________________________________________________
4 step solution
Problem 4
Describe two types of observations that give evidence for planets circling stars beyond our Sun. (1)___________________________________________________________________ (2)_____________________________________________________________________
3 step solution
Problem 7
Match the following firsts to the correct spacecraft. First: _____(a) Human in space (Yuri Gagarin). _____(b) Reusable piloted spacecraft. _____(c) Spacecraft to cross Neptune's orbit _____(d) Search for life on surface of another planet. (1) Space shuttle. (2) Pioneer 10. (3) Viking 1 and 2 (4) Vostok 1.
4 step solution
Problem 8
Explain why scientists concentrate on receiving intelligent radio signals in their search for possible life on planets circling other stars beyond our Sun. _______________________________________________________________ _______________________________________________________________
4 step solution