The kids have their food and blankies so I have a momment to post here.
Eighth graders, you should be starting work day on your first solutions contract. Jake asked earlier in the week why salt water has different times and temps to boil(and melt), it's a good question.
Seventh graders should be working on your pressure contract.
If you have any questions feel free to ask. I am really miss seeing the ways you all invent to show the must show. You were just getting good and your contracts were becoming more engaging.
Howmany different types of salt are used to de-ice roads? I know of sodium cloride and calcium cloride.
ReplyDeletemr. Hoopman if road salt is so bad for the environment overtime, why do we still use the substance?
ReplyDeleteDUDE MR HOOPMAN YOU MISSED OUR LAST WEEKS CONTRACT LIKE 4 PEOPLE DID CHEMICAL EXPERIMENTS!
ReplyDeletesoluability is how well the solute can be disolved in the solvent
an example is like lava and a pen
the pen is the solute that is disolving into the solvent
the solvent is the lava that disolves the solute
why is road salt better than regular salt
ReplyDeleteHow come we need to learnabout all this stuff if we are not going to be scienctist is it really all that important to everyday life?
ReplyDeleteJack,
ReplyDeletethere are other ways to add traction or get rid of ice and snow on roads, but none are as cost effective as salt. or as well known, which leads me to...
McKenna32,
don't sell yourself short, you may be a scientist some time in your life. don't close off any path choices in life at such a young age. if not, in the very least you know about these things that really do affect you whether you know aobut them or not. i can't send you on if I dont at least give you the opportunity to learn about the world around you, a chance to give some evidence to back up the choices you make. some day you may live in a town that wants to replace road salt with beet juice or salt instead of sand. what side would you choose? why?
pania,
DUDE!
sam,
there is a difference?
How can you tell how much volume somthing has by Seing how much water it pushes out of something?
ReplyDeleteLucus,
ReplyDeleteHow much water does it push up? That is the volume. SOmething will displace a volume of water equal to its own volume.
Salt can cause the boiling and feezing point to lower. WE know fist hand about the boiling point because nick dumped salt into boliing water on tuesday during our preesntion and it like exploded!
ReplyDeletehey mr. hoopman question!
ReplyDeletedid you get our contract because i "finished" i think and sent it again and i was wondering if it worked or i should try again...
COME BACK SOON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:)
ReplyDeleteMr.Hoopman can you post the contract for week 25 please! ASAP!It's on Earth atmosphere some thing got messed up with the wiki page on the contract for the first unit in atmosphere. Ps this is for the sub-Mrs.Krueger Thank you
ReplyDeleteMr.Hoopman do you have the contract for week 25 on atmosphere thanks
ReplyDeleteps:This is for our sub Mrs. Krueger
Please respond asap
Thanks
Mike, technically there are 60 different salts that we could use on roads. 20 of them are radio active. Which leaves 40 neutral ones left. Of those, at least 20 are deadly and would kill too much wild life. So, I'd say that we only use about 20 different salts.
ReplyDeletewhy do alloys have so many uses in moderan life
ReplyDeleteI was thinking, if we spend so much money on salt alternatives and other things couldn't we just devote that money to space travel and see what technology aliens have? I mean if we did this couldn't we trade for new technology and save money in the long run? In addition to that we would probably gain so much in the transfers that it would pay for the cost of the space missions.
ReplyDeletehow can you tell from a chemical equation if it is endo or exothermic?
ReplyDeleteI broke an egg for my A contract. If you are wondering why I did it is because it showed pressure.
ReplyDeleteAre there any places where there isn't any pressure?
ReplyDeletemiss u come back soon!
ReplyDeleteDo you know why a liquid becomes a solid? Its beacuse when a substance is in a liquid its particles have high kinetic energy and when it gets cold its particles loose kinetic energy and slow down and heat each other less often and then the substance becomes a solid
ReplyDeleteCan you eat the salt that you put on the road? if no, why not?
ReplyDeleteit is so very fun and i want you back i miss u sorta kinda ish
ReplyDeletei wish you were here its very boring and dumb!!!!!
ReplyDeletelol yea i saw that brook it jsut wen like poof!
ReplyDeleteand our sub is so (-_-)
she doesnt like it wen we do experiments!
Mr. Hoopman What would this weeks B contract be???????
ReplyDeleteMr.H wat up???????Liking not bening in school???????Can i please switch spots....PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE with a cherry on top!:)
ReplyDeleteMcKenna23 It is important because #1 you dont think right now that you are going to be a scientist but in high school you could be really good in chem. class and decide to mager in science.
ReplyDelete#2 I'm thinking about becoming a CSI; field or lab.so even in the field i will kneed to know basic chem. and in the lab a more advanced chem.
What im getting at is that most jobs require you to know about things that right know seem usless...like algibera...U C?
why don't we use sand for in the winter in stead of salt
ReplyDeleteMR HOOPMAN ARE YOU CHECKING OUR WIKIS? BECAUSE IM GOING TO RE MAKE NEW WIKIS EACH WEEK AND IM NOT SURE IF UR CHECKING THEM BECAUSE IF YOU DONT CHECK THEM AND I REMAKE OVER THEM YOU MIGHT GIVE ME AN F BECAUSE U DIDNT SEE THEM!!!
ReplyDeletemr hoopman next week is on microscopes and i was wondering what you mean by a investigation?
ReplyDeleteWhy do we need to use different salt to keep ice from forming on roads?
ReplyDeleteHow is road salt different than regular salt?
ReplyDelete