SCIENCE: MAY 25-28

Welcome back class.

Today is still.

Monday, May 25th.

Let's get back to our science.

We talked about this saw we talked about Excuse me.

We reviewed all their songs in the last video.

We went through the new sound Notes video.

I just want to hit a couple things of again

because if we were in my class right now, I'd

be hitting them six or seven times.

So remember, sound a couple of key things to take

away because there's so many vocabulary words.

There's so many things to learn from this particular video

section today.

Sound needs matter to travel right Sound is matter with

by operations.

This is my matter, right?

This is the thing that's vibrating off of it.

If I have a bigger piece of matter, it's likely

to create a slower sound wave.

A slower sound wave is also called something that has

a lower frequency.

Frequency just means how faster Slow away this traveling with

stout. So I play a lower No.

It usually has more matter or a thicker string to

buy right with and is moving slower.

If I have a higher note, it is usually a

centerpiece of matter or a shorter piece of matter, and

that is going to create a faster sound wave moving

back and forth really fast.

So frequency is how fast it pitches, how higher low

it is on both of those are related to each

other. High pitched, high frequency, low pitch, low frequency.

The other thing we talked about is volume.

Ah, fancy way to say volume is amplitude How big

that sound wave is.

So I'm playing really, really loud.

I'm creating a really big sound way.

If I'm playing something really quiet, I'm creating a really

small sound.

So what does that look like with our slinky model

of a compression or longitudinal wave?

So, for example, this wave up top would be, ah,

high pitch sound.

How do I know my slinky is kind of work

compressed together?

It's moving faster.

If I have a low pitch sound, that's what this

next one looks like.

It's more spread apart.

My sound wave is moving slower, but a loud sound.

It would look like this like you don't hear because

it's huge, right?

It's got a big sound wave, and if I have

a little tiny slinky that it's quiet because it's really

short. So amplitude is the measure from the top to

the bottom and wavelength, or how fast it's going for

frequency is measured from the two crunched parts of the

Slinky. Just fun, extra information.

So now we're gonna do our lab.

Our lab is due to do so.

You went through all this and it's making me go

back through it again.

Okay, we're doing the screaming cops lab today, and I

just freaked my husband out by practicing this in my

house. Our question today is how will the different positions

of our hands affect the sound from the cup hypothesis?

I predict that when my hands are closer to the

top of the cup, the pitch will be what my

hands are lower down.

The pitch will be.

What? Because let me show you the rig that we've

got here.

This is one highly heard you to do at home,

especially if you have younger siblings who are bothering you

when you're trying to do your school work.

This is a very annoying sound that it will create.

So I have in the picture you use a plastic

coupling a plastic solo cup work slow.

We're moving.

So we hardly have anything left in my house this

point. So I used an empty coffee filter.

Basically, Just want any plastic thing that you never want

to use again for recycling.

Um, you also need a strength.

The string is better if it is yarn or wool

or something like that.

Um, or like twine that you might use.

Just be very careful with twine that you don't hurt

yourself on the inside.

You should tight a paper clip.

I don't have any paper clips, so I tied a

bobby pin.

So you basically need something metal tied to a strength

with a hole poked in the bottom pulled type.

So then what we're gonna do is we're gonna take

our fingers and we're gonna slowly pull it down and

it's gonna make a sound.

I haven't read it yet, which is what really makes

the sound.

But this is my matter.

This is what's creating a vibrations.

It's going throughout here.

At what distance down my string Will my sound be

the lowest at which distance down my string will my

sound be the highest will be the shorter string or

will review the longer string.

That's really what I want you to keep in mind.

So now let's fill in the type of data pause,

fill in this section and come back when you're ready.

If you're listening to this video now, I'm assuming you're

writing for the answers.

The type of data we're collecting here is qualitative.

We're not measuring a decibel.

We're not measuring a frequency.

We're just using words and our observations.

It'll be pretty clear without collecting numbers.

My independent variable is where my hand is.

Position on the string.

How long the string iss, What's my deep henneberry?

What do I need to measure?

My dependent variable that I'm looking for is how high

or low the pitches Depending on where my hand is

down the string constants.

What are some of things that need to make the

experiment fair?

I need to have the exact same type of container.

No matter what I'm doing, I need of the same

body pin I need of the same strength I need

to make sure my hands are equally what Each time

I do this, you need tohave water and the string

because otherwise it won't work because of friction.

So we are gonna do.

It's really hard to measure 024 and six centimeters.

So we're just gonna do all the way down 3/4

away, down 1/4 of the way down and, like, 1/10

of the way down just to show the difference.

Okay, so this is my bucket again.

It would work better if I had a centerpiece of

string. It would work better if I had a paper

clip in a plastic cup.

But we're improvising.

This is Cove in 19.

So let's see what it sounds like all the way

down first.

So this would be our six centimeter measurement.

Ready? 321 So don't a set.

This is down here.

Record observations on your sheet of what that sounds like.

Okay, so now I'm gonna go about 3/4 of the

way down.

Are you ready?

This is what it sounds like.

Yeah, record your observations.

So we have now recorded for our six centimeters and

are four centimeters, so make sure you go back and

listen to the sounds again if you need to.

This is the two centimeter sound measurement, like 1/4 of

the way down It's harder the further you go up.

No. So write down your observations and zero centimeters.

Are you ready?

True. So as you noticed, is Mike closer?

My hand is to the top, right?

Zero centimeters almost doesn't have any sound because we need

matter to vibrate in orderto have any south eso right?

Your conclusion.

Sentence. While you're doing that, you know this is the

best way to annoy a sibling, dog or husband in

my case to keep this fire desk go away.

Oh, doing my homework.

Are you annoyed yet?

Great inventions of science?

My dog is barking in the background because she doesn't

like the noise.

So what's pretty clear in our conclusion sentences that the

closer we are to the cup, with the exception of

the zero centimeters, lower the pitches.

And that's because we have more amounted to vibrate.

It's the same thing in my hand is further down

the cup as it is playing a low note on

my guitar.

When have Mawr distance?

Former My hand is culture to the toe.

That's like playing a shorter strength or skinnier string or

higher note on my guitar.

So that's just kind of a way to practically use

this information to create something very annoying.

Um, so now you need to draw what you think

the sound way would look like for each of the

following distances based on their pitches and loudness.

So I'm gonna draw this with you, Joe.

You think that zero centimeter one would look like there

was very little to no sound?

So we draw a little, teeny, tiny one, but it

is pretty high pitched.

So you're wave should look something like this really tiny

because it's not very loud.

It's pretty short and pretty close together because the pretty

high pitch the next 12 centimeters was a lot louder.

And I would say they're all pretty consistently vowed after

that, but it's still a pretty high pitch, so it

should look something like this still pretty close together, but

much louder, our next one is much lower, so it's

still the same amount of loudness.

But you should be able to see my compressions.

My slinky is getting a little bit less squished together.

And then finally, for low note, probable.

If something like this right, really, really far spread apart

so you can copy my slinky is if you want

Teoh. These air compression waves when they're shorter, like my

zero centimeters.

That means that quieter when they're closer together, like my

zero and two.

That means they're higher pitch when they're further and further

apart. That means they're lower poach so you could use

it. Be at home.

Give me a high for Monday.

So down give you a low frequency sound This is

the low frequencies out.

I hope it's low frequency compression wave sound energy Give

me a high amplitude down This is a high amble

to town Loud means high amplitude sound energy longe do

What do you think about sound energy waves as they

go back and forth like this right when it leaves

my house, it's going like this almost out to my,

uh, other matter in the room.

If you could show a map showing the relationship any

graph showing the relationship between pitch and distance down the

strength, what would it look like?

Explain why and what would the axis be labeled?

This one is a think question, so let's think about

this. My first graph.

It shows an arrow going up right?

Something kind of like this.

So let's think as the string gets long necessary is

the string gets longer.

Does my pitch get higher?

That one's not gonna work.

Right? Is my string gets longer, my pitch gets lowers.

That one is not gonna work.

Let's take a look at our next one.

My next one looks kind of like this, right?

So this one would be as my pitch is getting

shorter, my, um, sound is getting lower, which also doesn't

make sense.

The next one shows a weird arrow going this way.

And so this one is showing me as sound as

my string is getting longer as my string is getting

longer. My pitch is getting lower.

No, it should be the one that looks like this

because as my string is getting longer, my pitch is

getting lower.

That's what I really meant to say.

I apologize.

If that wasn't clear, this one, because it was my

string is getting longer by pitches getting lower.

That's what I was trying to say the whole time.

So make sure you keep that in mind as you

responding to this lovely question that I totally for have

the answer to as I started against letting it.

Thank you so much for joining me today.

Guys. I hope you enjoy it are annoying lab.

Go create your own annoying noisemakers for your siblings and

family and have a wonderful evening until language arts when

I'll see you again.

SCIENCE: MAY 25-28

Audio TranscriptAuto-generated