Our Test on Sound is Friday.

Here’s our study guide.

Enjoy and let me know if you have questions!

Sound Test Study Guide

We’ll be continuing our studies of sound tomorrow, focusing on the components of a sound wave.

Additionally, we’ll be starting work on our own sound creations (or songs) in class.

If you’d like to get a head start, here are a couple of good online song editors (free):

- Myna from Aviary (My favorite)
- JamStudio (What We’ve Been Using in Class)

There’s also GarageBand on the Mac as well as Audacity (free) that works well on PC’s, Macs or Linux.

If you’re the enterprising sort, also check out Fission if you have a Mac.

See you (and hear you) tomorrow!

Looks like Spartanburg District 7 is on a 2 hour delay tomorrow, so we’ll be starting school at 10 am.

From Mr. Perkinson:

If we are on a two-hour delay, we will begin at 10am with a 10 min advisory. 3rd period will begin as usual and the rest of the day will be as normally scheduled.

8th graders will meet with Ms. Woodyard as previously scheduled during 3rd period or co-curriculars (Art/Band/Robotics).

Any questions?

See you tomorrow!

Like anything, sound can be used as a weapon. This is especially true because sound is a disturbance of energy. In some cases, that energy can be at such high levels that it causes pain to humans.

In this case, the US Military has been experimenting with using the LRAD (Long Range Acoustic Device) as a deterrent to potential adversaries.

It’s not pleasant to talk about weapons, etc but there is some interesting science in this segment…

Few interesting videos we discussed in 8.2 this morning…

You have a quiz on 16.1 and 16.2 tomorrow.

Study!

Awesome:

(Turn Your Speakers DOWN!)

Go find out why here.

Science rocks.

What Is Time? One Physicist Hunts for the Ultimate Theory | Wired Science | Wired.com: “I’m trying to understand how time works. And that’s a huge question that has lots of different aspects to it. A lot of them go back to Einstein and spacetime and how we measure time using clocks. But the particular aspect of time that I’m interested in is the arrow of time: the fact that the past is different from the future. We remember the past but we don’t remember the future. There are irreversible processes. There are things that happen, like you turn an egg into an omelet, but you can’t turn an omelet into an egg.”

I love this stuff.

Iceberg breaks in Antarctica not where expected: “With the dramatic crash of an iceberg against a glacier that dislodged a massive new chunk of ice, the mysterious continent of Antarctica once again did the unexpected.”

A big chunk of extra credit if you can figure out what happened and why it might matter (both for our studies of waves as well as the future of our planet’s climate). You’ll have to reflect back on our studies of elements, forces, pressure and waves.

And no… there is no “right” or “wrong” answer and you certainly can’t contain your hypothesis in one sentence, word or even paragraph