List of Topics

SfC Home > Physics > Gravitation >

 

Mini-Quiz: Effect of Dark Matter and Dark Energy on Gravitation

by Ron Kurtus (revised 21 January 2011)

Take this Mini-Quiz to check your understanding of the lesson material.



1. How is the mass of a galaxy approximated from the velocity of its stars?

From the equation E = mv2/2

By the equation for circular gravitational orbits

Velocity affects luminosity and thus the mass

2. What is the reason for proposing dark energy?

It is a way to explain the expansion of the Universe

Something is necessary to counter dark matter

It is a way to explain energy observed at night

3. What is an alternative theory to dark matter?

Dark anti-matter

Changes in Newton's laws for high speeds and large separations

Matter comes in various colors and shades

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.


Celebrate your successes


Resources and references

Ron Kurtus' Credentials

Websites

Dark Matter - Wikipedia

Cosmic Hide and Seek: the Search for the Missing Mass - Chris Miller

Dark Matter - Dr. Martin White - Astronomy Dept. Univ. of California-Berkeley

Dark Matter Essay - Joe Silk - Astronomy Dept. Univ. of California-Berkeley

Dark Energy - Wikipedia

Dark Energy - NASA

Gravitation Resources

Books

The 4-Percent Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality by Richard Panek; Houghton Mifflin Harcourt (2011)

Dark Side of the Universe: Dark Matter, Dark Energy, and the Fate of the Cosmos by Iain Nicolson; The Johns Hopkins University Press (2007)

Einstein's Telescope: The Hunt for Dark Matter and Dark Energy in the Universe by Evalyn Gates; W. W. Norton & Company (2010)

Top-rated books on Gravity

Top-rated books on Gravitation


Questions and comments

Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. I will try to get back to you as soon as possible.


Share

Click on a button to bookmark or share this page through Twitter, Facebook, email, or other services:

 

Students and researchers

The Web address of this page is:
www.school-for-champions.com/science/
mini-quiz_gravitation_dark_matter_energy.htm

Please include it as a link on your website or as a reference in your report, document, or thesis.

Copyright © Restrictions


Where are you now?

School for Champions

Physics topics

Mini-Quiz: Effect of Dark Matter and Dark Energy on Gravitation




Gravity and Gravitation

Gravitation topics

Theories

Principles

Applications

Center of Mass

Orbital motion

Escape velocity

Gravity



Let's make the world a better place

Be the best that you can be.

Use your knowledge and skills to help others succeed.

Don't be wasteful; protect our environment.

You CAN influence the world.





The School for Champions helps you become the type of person who can be called a Champion.