Sim kawm nyob rau hauv lub tsev rau cov tub ntxhais chemists

Lub thwmsim nyob rau hauv tsev, uas peb tam sim no tham, yooj yim heev, tab sis tsis tshua muaj neeg entertaining. Yog hais tias koj tus me nyuam yog tseem tsuas paub qhov xwm ntawm tus phenomena thiab cov txheej txheem, xws thwmsim yuav zoo li tiag tiag khawv koob rau nws. Tab sis nws yog tsis muaj daim card uas qhov zoo tshaj plaws txoj kev uas yuav tuaj complex ntaub ntawv rau cov me nyuam yog nyob rau hauv daim ntawv ntawm ib tug kev ua si - qhov no yuav pab ntsaub cov khoom thiab tawm tiag tiag li puas yuav pab tau nyob rau hauv ntxiv cov kev tshawb fawb.

Tawg nyob rau hauv twj ywm dej

Sib tham seb cov tau thwmsim nyob rau hauv tsev, ua ntej ntawm tag nrho cov peb yuav tham txog yuav ua li cas yuav ua rau ib tug mini-tawg. Koj yuav tsum tau ib tug loj hub puv nrog rau tej kais dej (piv txwv li, tej zaum nws yuav tsum yog ib tug peb-liter raj mis). Nws yog ntshaw tias cov kua los mus tiv thaiv nyob rau hauv ib tug nyob ntsiag to qhov chaw rau 1-3 hnub. Qhov no yog ua raws li no kom zoo zoo, tsis kov txog ntsha nws tus kheej, poob rau hauv nruab nrab ntawm cov dej los ntawm ib qhov siab ntawm ib tug ob peb tee ntawm number case. Lawv yog cov zoo rau kis nyob rau hauv cov dej li, yog hais tias nyob rau hauv tsab ntawv tsa suab qeeb.

Ib tug zais pa uas inflates nws tus kheej

Qhov no yog lwm nthuav kev uas yuav ua tau los ntawm nqa tawm tshuaj thwmsim nyob rau hauv tsev. Cov pob nws tus kheej yuav tsum tau ncuav ib me nyuam diav ntawm zoo tib yam ci dej qab zib. Tom ntej no, koj yuav tsum coj ib qho kev npliag yas raj mis thiab sau nws nyob rau hauv 4 dia ntawm vinegar. Cov pob no yog tsim nyog los rub rau nws lub caj dab. Raws li ib tug tshwm sim, vysypletsya dej qab zib rau vinegar, cov tshuaj tiv thaiv no tshwm sim nrog qhov kev tso tawm ntawm carbon dioxide, thiab lub pob inflates.

Vulcan

Siv tib lub dej qab zib thiab vinegar yuav ua nyob rau ntawm nws lub tsev ib tug tiag tiag lub roob hluav taws! Nyob rau hauv txawm ib lub hnab yas khob yuav siv tau raws li ib lub hauv paus. Nyob rau hauv lub "muzzle" pw tsaug zog diav 2 dia ntawm ci dej qab zib, ncuav rau nws ib quarter khob ntawm rhuab dej thiab ntxiv ib me ntsis zaub mov coloring tsaus xim. Ces yuav tsuas ncuav ib quarter khob ntawm vinegar thiab saib lub "uas".

"Dawb lias" khawv koob

Lub thwmsim nyob rau hauv tsev, koj muaj peev xwm qhia koj tus me nyuam, kuj muaj xws li tej yam txawv hloov thas xim rau lawv nrog ntau yam tshuaj. Ib tug piv txwv ntawm no yog cov tshuaj tiv thaiv uas tshwm sim thaum lub compound ntawm iodine thiab cov hmoov txhuv nplej. Nws lub xim av iodine thiab cov hmoov txhuv nplej snow-dawb, uas koj tau txais kua ... ib tug kaj xiav Hawj txawm!

foob pob hluav taws

Yuav ua li cas lwm tus muaj peev xwm ua thwmsim nyob hauv tsev? Science News for KIDS muaj enormous tau rau qhov kev txiav txim nyob rau hauv no hais txog. Piv txwv li, koj muaj peev xwm ua yeeb yuj foob pob hluav taws txoj cai nyob rau hauv lub chav tsev (tab sis zoo dua nyob rau hauv lub tshav puam). Ib me ntsis poov tshuaj permanganate yuav tsum tau crushed rau hauv ib lub hmoov zoo, thiab ces mus coj ib tug zoo xws li cov nqi ntawm hluav ncaig thiab kuj zom nws. Kom meej meej sib tov cov thee thiab manganese, ntxiv mus rau lub hlau hmoov. Qhov no sib tov yog ncuav rau hauv ib tug hlau hau (haum thiab cov pa lub npog taub tes thaum xaws khaub ncaws) thiab kom nws nyob rau hauv cov nplaim taws ntawm lub burner. Thaum cov muaj pes tsawg leeg ntawm lub glowing, pib crumble nyob ib ncig ntawm ib tug zoo nkauj los nag ntawm sparks.

dej qab zib foob pob ua ntxaij

Thiab thaum kawg, ib zaug dua hais txog tshuaj thwmsim nyob rau hauv tsev, qhov chaw uas koom lub feem ntau yooj yim thiab pheej yig reagents - vinegar thiab sodium bicarbonate. Nyob rau hauv cov ntaub ntawv no, koj yuav tsum coj ib lub hnab yas daig kab tapes, sau nws nrog ci dej qab zib, thiab ntau - sai sai ncuav 2 teaspoons ntawm vinegar. Nyob rau hauv lub kauj ruam tom ntej koj kaw ib qhob foob pob ua ntxaij hau, muab tso rau hauv av upside down, txav mus deb thiab saib yuav ua li cas nws yuav siv sij hawm tawm.