Astronomy - Test 1
Test form A
Do not forget to write your name and fill in the bubbles with your student number,
followed by a 0, and fill in test form A on the answer sheet. Write your name above as
well. You will lose points if you don't do this. You have as much time as you need.
For each question, mark the best answer. The formulas you may want are:
P2 = a3
(M + m) P2 = a3
c = λf
c = 3 × 108 m/sec
E = hf
1. Which of the following is the best description of an atom?
A) A little plastic sphere with springs sticking out
B) Several positively charged electrons surrounding several negatively charged nuclei
C) Several negatively charged electrons surrounding several positively charged nuclei
D) Several positively charged electrons surrounding one negatively charged nucleus
E) Several negatively charged electrons surrounding one positively charged nucleus
2. Black holes have so much gravity that they tend to draw gasses from neighboring
stars. However, the gas does not fall directly into the black hole, because there is a
great deal of angular momentum (rotation). What shape does the gas form before it
falls into the black hole?
A) A straight line streamer forming a line pointing towards the black hole
B) A thin circle around the black hole
C) A flat but round disk around the black hole
D) A slightly flattened sphere around the black hole
E) A round spherical shape around the black hole
3. This month the Moon will be at first quarter on February 9. When, approximately,
was the Moon/will the Moon be full?
A) February 1
B) Feruary 6
C) February 12
D) February 16
E) February 23
4. The evil Dr. Vile, floating in space, has just activated the Doomsday Device!
Professor Heroic, floating a few meters away, realizes her only chance to save the
Earth is to get to Dr. Vile and type in the disable code. Thinking quickly, she draws