ASTR 201 Assignment 3
Due 9.30am Wednesday 12th October.
1. Short answer questions. Each question is worth 3 marks. Answers to each question should be
no more than 150 words.
(a) What lines of evidence indicate that all life on Earth is descended from an
ASTR 201 Assignment 2
Due 9.30am Wednesday 5th October.
1. You are analyzing Moon rocks that contain small amounts of uranium-238, which decays into
lead with a half-life of 4.5 billion years.
(a) In one rock from the lunar highlands, you determine that 5
ASTR 201 Assignment 1
Due 9.30am Wednesday 28th September.
1. Given that the velocity of light is 3 108 ms1 , define a light-second, a light-hour and a
light-year in metres. Express your answer scientific notation. How long does it take light to