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Cool Stuff in Science Class

Yo my science teacher is awesome. He lets us do all this crazy stuff like lighting ping pong balls on fire... the flame was huge and then we wrapped one in tin foil... then the fire shot out of a hole in the foil and it looked like a rocket... anyway, have you guys done any weird things in science class?

haha cool, we were never allowed to do anything like that in high school, adn i have not taken teh chemistry lab course in college yet, but they show us some nice demonstrations.

Last week they showed us the creation of a partial vacuum in an oil drum, one of those big ones. they put water in it, heated it so that the inside was warm (comparatively to room tempature). Then the drum was sealed off, and he began to spray it with water to illustrate one of the ideas of gas laws in chemistry. He sprayed water on the outside of it, and then as the inside cooled down at a rapid rate, the atmospheric pressure remained constant while the inside pressure of the drum (pressure increases because gas takes up more room than liquid, newton's 3rd law, for every action there is an equal and opposite reaction...so the inside was pushing out and the atmospheric pressure was counteracting that)...the atmostpheric pressure remained heavily pushing against the drum while teh inside cooled down which resulted in teh gas condensing into a liquid as it cooled down. As it cooled, the pressure loss inside was rapid and it was lost a consequence of the change of state...but the atmosphere pressure was still pushing on it, so then what happened was that the drum collapsed very very quickly, i could not see it happen...like in an instant. It was sweet, you can do that same experiment with a pop can filled with a little water, heat it up, and place it upside down in water (so as to seal off the can), it will collapse as well.

it was sweet to see it happen on such a grand scale, unneeded, but cool. Sorry for such a long explanation with hard to follow sentences hah.

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i forgot but this was in chem i believe. we can bend water my teacher let the water running and then used some kind of metal to bend the water which it followed the metal around. it was kinda cool.

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Originally posted by AznTiger
i forgot but this was in chem i believe. we can bend water my teacher let the water running and then used some kind of metal to bend the water which it followed the metal around. it was kinda cool.

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quote:

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Originally posted by PsychoSnowman
haha cool, we were never allowed to do anything like that in high school, adn i have not taken teh chemistry lab course in college yet, but they show us some nice demonstrations.

Last week they showed us the creation of a partial vacuum in an oil drum, one of those big ones. they put water in it, heated it so that the inside was warm (comparatively to room tempature). Then the drum was sealed off, and he began to spray it with water to illustrate one of the ideas of gas laws in chemistry. He sprayed water on the outside of it, and then as the inside cooled down at a rapid rate, the atmospheric pressure remained constant while the inside pressure of the drum (pressure increases because gas takes up more room than liquid, newton's 3rd law, for every action there is an equal and opposite reaction...so the inside was pushing out and the atmospheric pressure was counteracting that)...the atmostpheric pressure remained heavily pushing against the drum while teh inside cooled down which resulted in teh gas condensing into a liquid as it cooled down. As it cooled, the pressure loss inside was rapid and it was lost a consequence of the change of state...but the atmosphere pressure was still pushing on it, so then what happened was that the drum collapsed very very quickly, i could not see it happen...like in an instant. It was sweet, you can do that same experiment with a pop can filled with a little water, heat it up, and place it upside down in water (so as to seal off the can), it will collapse as well.

it was sweet to see it happen on such a grand scale, unneeded, but cool. Sorry for such a long explanation with hard to follow sentences hah.

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Originally posted by kryogenix
yay, we did that in eigth grade. my science teacher also gave us a demonstration of sodium's reactivity with water... it was cool watching the explosions

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we watch videos..20 year-old shitty videos..

the labs we do are ok i guess..theyre never really that exciting

[QUOTE]Originally posted by castle outsider
[B]we watch videos..20 year-old shitty videos..

haha thats what we have to do in science...that and take pages of notes >_< and the labs r fairly boring..haha

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we do mad labs in my class .. almost everyday, none that r real interesting tho...but we did do this one where we lit different foods on fire to see what foods gave the most electricity lol .. i love this class, i got an a for tha mk period and an a on tha exam woohoo

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Originally posted by MasWusHot
we lit different foods on fire to see what foods gave the most electricity lol .. i love this class, i got an a for tha mk period and an a on tha exam woohoo

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we lit up a ballon once

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my science teacher in 6th grade taught us about explode and implode. lol soo long ago.. ughhh.. it juss popped yout! do we did experiment with soda cans. He put on the metallica song on in the computer and did implode and explode.. it was halraious! he didnt get caught.

2 weeks ago, my ap chem teacher brought in a potatoe gun. not a potatoe launcher, but a gun. i cant believe how simple the thing was. it was a pipe and a stick, but the piece of potatoe shot out REALLY fast, and made a really loud noise. You can also fire multishots. its crazy.

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"Love is like a friendship caught on fire. In the beginning a flame, very pretty, often hot and fierce, but still only light and flickering. As love grows older, our hearts mature and our love becomes as coals, deep-burning and unquenchable. " - Bruce Lee

a few weeks ago, we poured hydrochloric acid on sugar and this huge piece of crap apeared. it looks really disgusting and it smelled so bad that the janitors came and told us to stop

today we dissected sheep brain, tomorrow will be sheep eyeballs