►This site was originally created for my kids and their cousins, because we did science together. We eventually added more friends and I ended up having science classes for five years. I am no longer adding to the site (since 2014), but will leave it up for others' use. I do post to facebook occasionally if I come across something to share. =)

►Please accept my apology for any broken links or videos that do not work. I am always disappointed when people take down their videos from YouTube. It makes it hard to find just the right replacement. And because the videos were posted years ago, I usually have no recollection of what the video was about.
I kept thinking I would have time after my kids graduated, but life has filled up my free time with new responsibilities. =)

►Please do not email, asking me to post your website link, or to review something to put on my site. Any resources posted on this site are things I had found on my own during my regular searching for material I needed at the time, and liked it well enough to post here. There have never been any affiliates on my site, and as it is no longer active, would not be worthwhile at this point. ;)
Thank you!

Apologia Physical Science, Module 14, Waves and Sound

Play  Quizlet.  Just scroll down and find the Module you want.

1) p. 345-348 - Transverse and Longitudinal Waves

2) p. 345-348, Longitudinal Wave

3) p. 353, Fahrenheit to Celsius Conversion

extra if you want to know:
From Celsius to Fahrenheit
The way I learned it in school, with the fraction 5/9
Try both ways.  They work!  =)

4) p. 353-355, Weather & Meteorology: How Can I Tell How Far Away a Lightning Strike Hit? 

5) p. 355-357, Close to Mach 1

6) p. 355-357, Sonic Boom

7) p. 361-362, The Doppler Effect
With longer wavelengths, you'll hear a lower sound.

9) p. 361-362, Picture of Supersonic Shock Wave

10) p. 363-365, How the Ear Works

11) p. 366-368, Ultrasonic wave with obstruction
(Here are more if you are interested)


  1. Hi, my name is Grace, this is really helpful thank you. :)


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