Fire + Sand = Glass! 

I came here expecting to see glass spawn from fire and sand. I'm not amused.

Did the word "sand" even occur in this video

note to self....read comments before wasting time waiting for subject of video title to come along

Fire + Sand = Glass!..................Not in this video

I came here for sand + fire and left disappointed.

This video is about the Prince Rupert's Drop, not how to make glass using sand and fire. Very misleading title.

2:29 blew my mind

Where's the effing sand? Is it even mentioned?

Glass blowing has always amazed me.

Wait wait, hold on. People make bottles out of *glass* now?

Well that is 5 minutes I won't be getting back...

i was far more fascinated with this than i had initially thought i'd be! very nice.

1:45 R.I.P Glass jar :(

Great video. My fish liked it also.

Really interesting! Maybe the best MITK12 Video so far.

well its three in the morning and i dident come here for sleep but it damn well gave me it

I just spent 5 minutes of my life learning about glass.

That's the longest Prince Rupert's drop I've seen anyone make. Very cool!

why does everyone make that pumpkin?

common Glass is composed of about 75% silica (SiO2) plus sodium oxide (Na2O) from soda ash, lime (CaO), and several minor additives. The most common constituent of sand in inland continental settings and non-tropical coastal settings is silica (silicon dioxide, or SiO2), usually in the form of quartz.

People are disliking because they are so used to action videos, like they can't comprehend a video could have a totally relevant title that sounds exciting without being an action video. It's an educational video! Don't dislike just because you are too lazy to enjoy the science.

Well explained, with a nicely modulated voice and a lovely accent

"I don't like sand, it's coarse, dry and gets everywhere"-Anakin Skywalker

What about molten glass dropped in liquid nitrogen? That would be a tough one to break.

Dude didn't even say "sand". Masterful trolling, MITK12Videos. Well done.

the fuck this is not what I came for

y'all are like "Where is the sand?" It turned into glass dum dums

Not what I was expecting, but it was well done.

People are getting pissed. Change the title.

Does the glass only bend with heat or are there some materials

Not what I expected but cool!

I once knew how this worked. After watching this video I forgot everything.

the end of the glass drop is extremely strong *hits it with a hammer like with a pillow* fucking apply your whole force to it and you can see its very weak

Thank you for explaining glass to me

2:32 Mind blown

so why the thin end is needed? why all glass objects aren't just cooled down rapidly in water? Should get the same effect only without fragile tail.

Glass is amazing.

Lol im watching this on my phone which has a big crack in it

2:11-Looks like lava to me.

So will go to the beach, collect some sand, go back home, put it on a pan, on the stove to provide fire "heat" then will have a circled shape glass !

!looks at title! MIND. BLOWN.

Are the bubbles left in the glass vacuum?

1:54 right when the shards flew, i felt something hit my hand and slide along my arm, like a shard of glass had flown at me, except it was kinda soft and didn't hurt, and after THERE WAS NOTHING THAT COULD'VE HIT ME!!!!!!!!!!!!!!!!! that's freaking crazy awesome

Reading the comments section leaves me no hope for humanity. P.S. Great lecture on materials science/continuum mechanics. :D

Very impressive

good job

just learned about glass. feeling good

this is very informative

8 years later on my recommended, cheers youtube

at 4:20 you show a Prince Rupert Drop under polarized light the "bubbles" are shown with dark lines around them. My question for MIT is : Are those really bubbles or are they under vacuum? basically you have a molten mass of glass that should be fined out (having no bubbles). when dropped in water the PRD contracts as said from the center that remains somewhat soft. Many of the bubbles in PRD are weird shapes pointed and flatish ,no where are they roundish as most bubbles in glass or other fluids. So picture this ;;the "bubbles" are formed like putting you hands together palm to palm and then moving you knuckles away from each other making a hole between your palms. Wouldn't this cause a vacuum and not create bubbles.? You can also get "bubbles" to form by gathering up some glass ,, blocking the form to make a round ball then blast one side with compressed air as the glass rapidly cools you can watch the voids form and get larger as you apply more air. i speak from 35 years of glass batching and glass manufacturing experience.

Fire =15% Sand = Sry, Wrong title. Glass = 85 % And sadly they didn't add fire to the sand nor sand to the fire and wtf where is the sand.

It's not ductility. Ductility is the ability to be drawn into a wire. Malleability is proper as it is the ability to formed into a shape without deformation or damage.

Well duhh... haven't you played minecraft?

2:32 lol how?

You didn't explain how thin fibers of glass can be extremely flexible, that glass is now becoming a standard everywhere for moving data at light speeds, or that glass is used as a structure material and to provide structural support.

Wow thanks for showing me how to make glass

I will never lick my glasses EVER AGAIN

For reference, they don't thermally temper glass in smartphones, that would be a bad idea. It is chemically strengthened using ion-strengthening.

_chaaannngeeee the titleeee!!_

You helped me a lot at a school project

thank you

Press 5~ & your reaction goes like this :O

what the actual fuck I came for!! The picture of the video is turning sand to glass from a microscope and like the fuck this

Compression and Tension theory is back to front i believe.

those glass drops are pretty much just tadpoles

Ok,that's we're the glass made. Hehe

I tie all my glass items, with Abok knot #1142.

Wow this is cool

Its just a title people Its the content that is important Not the title

ductil means the capability to transform a metal into smaller and shorter wires

what samsung is that

put sand on the top of the furnace and coal at bottom to make glass block!

Wow WHO KNEW SUCH AMAZING OH MY GOOD WOOW (Sarcastic)

Amazing science

good to know

Won't cooling a glass faster produce a HIGHER density? (since the same no. of molecules are trapped inside a smaller area?)

Would really love to find people who can work with me on my land to start making glass because it's full of sand

HURR DURR I WONDER HOW MUCH COCA-COLA PAYED THEM Just kidding, great video

what smartphone is the one at 0:58 ?

I was looking for a Simple English explanation on how glass is made. But instead I found #Science Class.

if i had a phone this old i'll break it on purpose

I like the glass video.

Why don't you post a video that tells us how long to put it in

i hate it when people say glass is brittle ... a glass wall would be more solid than bricks but noone makes windows just as thick as walls

Fire + sand ≠ Glass. Fire + sand = Fused Quartz

I came here because I always wondered why when I put sand in Minecraft, I get glass LOL. now I know this XD

3:22 black ops 3 lol

Make a prince rupert's drop without the tail.

This seems so much more interesting then electrical engineering........

Where was the sand part?

I was so excited to watch this video, And then I get B-U-L-L-S-H-I-T.

wow nice video, great explanation on stress factor.. can i add your video to blog !!

I feel... Smart now

Hey!!!!I learnt that fire and sand gets silicon....how glass????

Chances are it will be too late by the time you see this but just in case: If you came because of the title, the video begins at 4:59 and ends at 4:59. Considering that no where in the video does it relate to the title, the video never happened.

The stuff from around 2:00 about the Prince Rupert's Drop was WHOA amazing! but yes, title is misleading and while I wouldn't go so far as to call someone a "cunt" as other comments have, we really expected to see actual common SAND being refined and doped into consumer glass. (The info is Google-able, you wouldn't be blowing up any deep trade secrets)

Can you make a Prince Ruperts drop out of metal? or any other solid that can melted?

I love me some glass every morning

It reminds me of Firestar and Sandstorm

That is cool