ASTR 1P01/02: Introduction to Astronomy I/II
Practice Questions

Please solve the following questions. This is not an assignment, it will not be graded, and you do not need to submit your solutions to anyone. The questions are simply intended to help you practice for the exam.

These questions will not appear in the exam itself. Students who don't genuinely attempt to solve the questions on their own, and only memorize the solutions, will have a very hard time in the actual exam!

These questions are not multiple-choice, to encourage you to think of the answers on your own, but the questions in the actual exam will be multiple-choice.

If you need any clarifications for these questions, you can ask for them on the course Teams channel.

Question 1

How can we define mass precisely?

Question 2

How are the two different definitions of mass related? Can an object have two different masses depending which definition is being used?

Question 3

How does the concept of energy explain why an object accelerated when it falls?

Question 4

What is the meaning of Einstein's popular equation, E = mc2?

Question 5

What is the structure of the atom?

Question 6

I have two different chemical elements. What can you say about the number of protons in the atoms of each element?

Question 7

How many protons are in a carbon atom?

Question 8

What do I get when I bind together 2 up quarks and 1 down quark?

Question 9

What is the strong interaction? Which particle mediates it?

Question 10

Is gravity described by the Standard Model?

Question 11

What is the mass, charge, and spin of the photon?

Question 12

What is the mass, charge, spin, and generation number of the charm quark? Is it stable?

Question 13

A particle has spin 3/2. What kind of particle is it?

Question 14

Where, when, and how was the Higgs boson discovered?

Question 15

What is the difference between elementary, composite, and subatomic particles?

Question 16

What would be the charge of the antiparticle of a bottom quark?

Question 17

What happens to the mass in an electron-positron annihilation?

Question 18

In one sentence, how is light produced inside stars?

Question 19

A star has a mass 3 times larger than the mass of our Sun. Which process dominates its nuclear fusion?

Question 20

What is deuterium?

Question 21

Describe all the steps in the proton-proton chain.

Question 22

A positron is released in step 1 in the proton-proton chain, when one of the protons undergoes beta plus decay. Why can't an electron be released instead?

Question 23

Which step in the proton-proton chain takes the most time, and why?

Question 24

How many neutrons are in a helium-8 nucleus?

Question 25

Why are two single protons produced in step 3 of the proton-proton chain, in addition to the 4He nucleus?

Question 26

In the process of creating one 4He nucleus via the proton-proton chain, how many photos are emitted in total? And how many of these are due to antimatter annihilation?

Question 27

What portion of the initial rest energy is converted to kinetic energy in the proton-proton chain?

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