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

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




Question 2

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




Question 3

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




Question 4

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




Question 5

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




Question 6

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




Question 7

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




Question 8

In the proton-proton chain, how many total helium nuclei do we end up with?




Question 9

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




Question 10

What happens to the mass in electron-positron annihilation?




Question 11

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




Question 12

Which of the following is a main-sequence star?




Question 13

A star is located on the top left of the H-R diagram. This star has...




Question 14

What is nuclear fusion?




Question 15

I see a very faint star. This could mean:




Question 16

A proton is made of...




Question 17

Which of the following is a blue giant?




Question 18

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




Question 19

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 20

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 21

In an atom, the protons are located...




Question 22

Which of the following stars is the hottest?




Question 23

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




Question 24

Which of the following is the longest?




Question 25

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




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