Practice Test

Please solve the following questions. This is not a real exam, 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 real 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!

This sample exam is online, but the real exam will be given in person, at a time and place indicated on the course website.

THIS IS NOT THE ACTUAL EXAM!
THIS IS JUST A PRACTICE EXAM!
THE REAL EXAM IS IN PERSON!

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

Question 1

What happens to the mass in electron-positron annihilation?




Question 2

Which of the following is a red dwarf?




Question 3

Which of the following stars is the hottest?




Question 4

What is nuclear fusion?




Question 5

I found a hydrogen-9 isotope. How many neutrons does it have?




Question 6

Object A has mass 1 kg. Object B has mass 9 kg. According to E=mc2, how much rest energy does object B have compared to A?




Question 7

I observed an object, larger than Earth but smaller than the Sun, which does not generate light by either deuterium or hydrogen fusion. What is it?




Question 8

What kind of mass is defined as the strength of an object's gravitational field?




Question 9

If the spectral lines of a star shift toward red, this means...




Question 10

Which of the following stars is the brightest in the sky?




Question 11

In an atom, the electrons are located...




Question 12

Which of the following is the shortest?




Question 13

A star was measured to have a parallax of 0.25 arc seconds. How far away is the star?




Question 14

A photon has a wavelength of 700 nm. What color is it?




Question 15

Compared to cepheid variables, RR Lyrae variables typically have...




Question 16

I see a very faint star. This could mean:




Question 17

A neutron is made of...




Question 18

In the H-R diagram, red giants can be found...




Question 19

In the proton-proton chain, how many total hydrogen nuclei do we start with? (Remember that steps 1 and 2 happen twice in a full chain!)




Question 20

A star is located on the bottom right of the H-R diagram. This star has...




Question 21

Which of the following is a main-sequence star?




Question 22

If a particle has charge -1, what would be the charge of its antiparticle?




Question 23

Photon A has wavelength 1 cm. Photon B has wavelength 2 cm. Which photon has a higher frequency?




Question 24

I want to measure the distance to a star that is estimated to be a few thousand light-years away. Which method should I use?




Question 25

Star A has brighter apparent magnitude than star B. What does that say about the luminosity of the two stars?




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