"Thats good television right there" It sure is Mr. Bob.

back when my Mom was teacher, she used to do this in her science class... Man, I'll tell you what, that was some of the most fun I ever had!

"can't do at home." Challenge Accepted

wow!!! thanks science bob i showed my class this experiment to my class with my science teacher and im in 6th grade thank you very much.

Great to hear Alyssa, and thanks for posting your video of the levitating orb on your KZread channel - it worked great for you!

Science Bob I really like your experiment. Last year I did your experience at my school science fair and I won

The man is making me smile of How excited he is. He's so cute (in a teddy bear way) Lmfao.

Your videos are actually REALLY REALLY cool. Keep making these videos please :)

I have a plus in our science project! Thanks Science Bob.

What other subject can do awesome experiments like this?! NONE. Thats why Science is awesome! Thanks ScienceBob for the levitating orb demo, i showed my past teacher the trick and he said it was his best demo for his class! THANKS!

Bob, u just saved me from hours of boredom with ur videos

very cool sience bob i loved all foamy and stuff!

this guy is the only person who does real good science on u tube

Why are ur videos so addicting? :D

This was really fun to watch! :)

its AMAZING!! LOV THE SECOND PART!

The shape of the flask is essential to the speed the foam comes out! Tapered to straight neck. The principle of tuned rocket exhaust, hydraulic mining, and a little tool that turns a garden hose into a pressure washer. volume forced thru a tube into one of smaller cross-section results in an increase of velocity. Proportioning of the tubes is important to minimize cavitation and turbulent flow!

now thaaaaat is science!

Hey ScienceBob I plan on doing this big demonstration using the same approach you took at the second experiment and I like to know the ingredients you used. Thanks in advance

"Look at that, that's good television right there."

The last one is amazing

so the lastone can`t be done at home? why? is it toxic,? or is it because of the mess :).. could it be done by carefull kids at school? thanks

got me the best performer award in science fair

That's awesome Bob

Elephant toothpaste :> Favorite high school experiment

We are learning about exo and endothermic reactions in my class right now!

hi bob! how do you do the biggest foam? (the foam that jumped high) and it is ok to touch the foam? I will do this for an school experiment so i need information :)

your awsome bob

@ScienceBob for the small one what tools you need and how many cups of it do you need, also your experiments are really cool

His attitude reminds me of Cave Johnson, especially the "Now thats science!" part

I love your videos they're so cool!!!

would it work with 3% hydrogen peroxide?

we found you cause our son was in head start. we been using ideas from your page just for fun. now my daughter is doing rock candy from your site for science project.

Incredibly awesome

its always the coolest ones i cant do at home :( this is pretty epic nonetheless :D

"See it steaming? It's an exothermic reaction, it creates heat." I'ma go with no, not at first.

I think I finally found out how to make lightweight concrete. Thanks! :)

Could anyone tell me wich catalyst there's being used for the last, more "explosive" experiment? I really need to know, as I'm gonna use it in a science project at school, and need a little more shock-effect than a little bit overflow of foam. Answers is HIGHLY appreciated, thanks in advance.

People should call you epic science bob

You can add NaI or KI either as a solid (powder/crystalline) or as a saturated solution (dissolved in water).

Love his science robe

@Skreechchannel Im guessing for hair care it is very diluted.

we've tried to do this on my elective classes, but the reaction was not fast enough... it is ok to use only yeast, or is there some other catalyst to be used?? :)

Science Bob is best scientist!

WOW THIS ISSO AWESOME!bob u r like a science geniuss!

@WhiteLightSonic I'm pretty sure you can. All it is dish soap bubbles filled with oxygen if I'm not mistaken. I haven't done chemistry so I'm not sure.

"This you can't do at home" Pfffft, we'll see about that.

You can do that second one at home. I know where to get peroxide like that. I won't say what it is or where to get it. It is very strong stuff and should not be messed with. Peroxide that strong can cause a fire without the help of a flame so do it outside and away from your house. I am not responsible if anything happens to you from using that stuff. It will burn you or blind you permanently. It is a very strong oxidizer and it will cause fires without matches or flames.

@JohnDoe-gm5qr

9 жыл бұрын

There is a pool chemical that is 36% peroxide and it is very nasty stuff. If you pour it on some paper it can catch on fire without ignition from a flame. If you get any on your skin you will not know it right away. If you even THINK you got some on you wash good with soap and water. Sometimes things like that say wash with water for 15 minutes but I think that is to be sure you got most if not all of it off and there is no guarantee that you are OK. It just helps so it does less damage (if it already has not been done). If you ever mess with things like this use them outside so you don't burn your house down accidentally. You do not need matches to cause a fire with peroxide if it is strong enough. It can start fires on its own. The bottle it comes in is sealed inside a thick plastic bag and crimped shut with a piece of heavy wire just in case any of it does spill.

@JohnDoe-gm5qr

9 жыл бұрын

***** There are some hair care products that places like Sally Beauty Supply won't sell to just anyone and they are open to the public. It is not one of snobby places that won't even let you in the door without a cosmetology license but it used to be. I know that because my mom wanted to shop in there when they required a cosmetology license but that was a long time ago.

@megastoejoe

9 жыл бұрын

tis why they use it as an oxidizer in rocket fuel =P

I came... here to see science! And I'm not disappointed.

I have 27% H2o2 peroxide, that i put in my water before i drink it, wud that be okay to use?

@chbort Glad to help. Let us know how it goes!

this guy is such a maverick i love him

wht would happen if you where to seal the top of the bottle? would it exploded or simply die out after a while?

The green one was AWSOME! It was the best! :D

An amazing person!

This is why I like Science.

ScienceBob is great! better than cable television.

How do you clean the foam when youre done?

Awesome Bob :D -Om Nom

Thanks science bob! Im going to do this for my project at my science fair! Ill make sure to tell you my grade!

NOT ENOUGH FOAM?? SURELY THIS IS MADNESS!!!

I have a question: "if I wanted more foam, could I just put more hydrogen pentoxide in?"

Would this foam go gard Can you use this type of foam to make sound proofing blocks?

Love the second one

@ScienceBob Where can i buy hydrogen proxide 36%? and 6%?

@solarseth Hey Seth! You made great science videos. I hope you make some more!

@Susancool334 Yes, you can wash to foam down the sink.

is the smallest one okay to touch? or do you have to clean it with gloves

Cool experiment bro

Reminds me of edward norton

i just wish you are my science teacher i want to do experiments like that everyday!

can you make a list of the materials

This is awesome.

What did she pour into the big flask? Was it a yeast & water solution like the other one?

And this is how Dr. Sheldon Cooper came out with this haha

god dang bob youre awsome

So cool wish I had all tht materials.

@josephbellavia3905

10 жыл бұрын

it's yeast and hydrogen peroxide

OMG!! I love this one!! i saw it on the Jimmy Kimmil show!!!

Now im not crazy so I'm gona step back here while you do it XD!!!

i love science even though im a bit smaller age for all this its so cool!

what exactly is the chemical poured into the solution in the second experiment? Please help me...

@YellowDaisy0123 The chemicals or the second experiment are usually only available to chemists and teachers. Speak to a hgh school teacher about helping you with this. Have fun.

how do you get the foam to rise up faster???

Will it blend?

today i did this in one of my classes but we put some h2o2 dish soap and potassium iodide and it made it even bigger. wicht one is better????

can it be any bottle or does it have to be a soda bottle or could it be a container

@ScienceBob do u have to use food coloring?

How many ml is that flask?

Shockingly explosive!!

@alewisgb will it replace the hydrogen peroxide

cool how do you do that i want to do it

I have a question... My science teacher is doing this expierment and she wants to know what measurments he used and what the calasytsis...if anyone can help me with this my whole class would really appreciate it! Thanks!!!

Did you use potassium iodide or manganese dioxide for the second one Science Bob? Or were you sticking with yeast?

this is really cool!

So is it the yeast reacting with the H2O2? and what would happen if you didnt add the soap? what would the reaction look like?

what was the last ingreident for the last experiment???

Yes, MikoSquiz is right, that is a demonstration - see the experiment instructions on the website for ideas on how to turn the demo into a true experiment.

mannn i have been lokking for the one vid that can show me how to do it FINALLY havent tried it yet but cant wait. i was looking for it for about 2 days because 3 days ago my science teacherlet all da student do the extothermixc one in class n we got to keep it SO MUCH FUNNN!!!!!! i jst wanted to do ut again noe i finaly get the chance to !!!!

@courtkneepee yeah... the shot up to the ceiling was a nice effect.

how did that happend sir bob? its cool!