Tshuaj rau cov me nyuam: nthuav thwmsim

Qhov no yog ib qhov nyuaj, tab sis nthuav science, chemistry, yeej ib txwm ua rau ib tug tov cov tshuaj tiv thaiv cov schoolchildren. Hais mav yog nthuav thwmsim, ua tau tshuaj qaim xim sawv tawm gases los yog los nag. Tab sis lub complex kab zauv ntawm tshuaj dab sau zoo li ib tug ob peb leeg.

Qhov tseem ceeb ntawm entertaining kev

Raws li cov niaj hnub tsoom fwv teb chaws cov qauv nyob rau hauv theem nrab tsev kawm ntawv nkag tau rau hauv peb tes num kev tshawb fawb. Xws li ib tug khoom kev pab cuam raws li cov tshuaj, kuj tsis mus unnoticed.

Raws li ib feem ntawm txoj kev tshawb ntawm complex transformations ntawm teeb meem thiab daws tau cov tswv yim muaj teeb meem rau cov hluas chemist xyaum honing kev txawj ntse. Nws yog ib qho txawv txawv kev thaum lub sij hawm tus xib fwb tsim nyob rau hauv nws cov me nyuam kawm ntawv txaus siab nyob rau hauv cov kev kawm. Tab sis zoo tib yam xib fwb yog ib qhov nyuaj rau nrhiav tau txaus spare lub sij hawm uas tsis yog-tus qauv sim kawm thiab kev coj cwj pwm thwmsim nyob rau hauv Science News for KIDS rau cov me nyuam cia li ib zaug.

Yuav kom kho tau qhov no, nws yog invented ntau elective thiab elective courses. Los ntawm txoj kev, ib tug ntau ntawm cov hais mav uas yog addicted rau Science News for KIDS chav kawm 8-9, ua kws kho mob nyob rau hauv lub neej yav tom ntej, kws muab tshuaj, kws tshawb fawb, vim hais tias nyob rau hauv xws li ib tug hluas chemist chav kawm tau txais ib lub sij hawm mus nqa tawm thwmsim thiab kos kev xaus rau lawv.

Yuav ua li cas kev kawm yog hais txog entertaining tshuaj thwmsim?

Nyob rau hauv lub qub hnub, lub Science News for KIDS rau cov me nyuam yog tsuas muaj nyob nrog cov 8 th qib. Tsis muaj tshwj xeeb kev kawm los yog yam kev ua rau cov me nyuam directional tshuaj twb tsis npaj siab. Nyob rau hauv qhov tseeb, ua hauj lwm nrog tub ntxhais ntse me nyuam nyob rau hauv Science News for KIDS tsuas tsis tuaj kawm ntawv, uas tsis zoo xav txog cov cuj pwm ntawm cov menyuam kawm ntawv rau cov kev qhuab qhia. Cov me nyuam ntshai tsam thiab tsis to taub cov complex tshuaj haum, yuam kev nyob rau hauv sau ntawv ionic sib npaug.

Nyob rau hauv kev twb kev txuas nrog cov kho kom zoo ntawm niaj hnub kawm system tau hloov. Tam sim no nyob rau hauv cov tsev kawm ntawv tej kev kawm rau cov me nyuam muaj nyob rau hauv lub qis qib. Cov hais mav zoo siab ua ib txoj hauj lwm yog hais tias nws muaj tus kws qhia ntawv, kawm kos kev xaus lus.

Tsis teb los tau kawm hais txog Science News for KIDS, los pab lub tsev kawm ntawv cov menyuam kawm cov kev txawj ntse ntawm ua hauj lwm nrog khoom siv sim, thiab yees yau cov tub ntxhais kawm muaj xws li tiag tiag li ua qauv qhia tshuaj thwmsim. Piv txwv li, cov me nyuam kawm rau hauv lub thaj chaw ntawm cov mis nyuj, raws li kev nrog cov neeg tshuaj uas yog tau nyob rau hauv nws cov skisanii.

Lub thwmsim hais txog dej

Nthuav Science News for KIDS rau cov me nyuam yog nthuav, thaum lub chav kawm ntawm qhov xyaum ua tej lawv pom txawv txawv tshwm sim: lub evolution ntawm cov roj, qaim xim, txawv txawv aftertaste. Xws li ib tug yeeb tshuaj, xws li dej, yog suav tias yog zoo tagnrho rau ntau yam ntawm nthuav tshuaj thwmsim rau menyuam kawm ntawv.

Piv txwv li, lub Science News for KIDS rau cov me nyuam 7 xyoo yuav pib mus tshawb nws cov khoom. Tus kws qhia ntawv qhia rau cov me nyuam tias feem ntau ntawm peb ntiaj chaw yog them nrog dej. Tus kws qhia ntawv qhia rau cov menyuam kawm ntawv thiab hais tias dib liab nyob rau hauv nws ntau tshaj li 90 feem pua, thiab nyob rau hauv tus neeg - txog 65-70%. Tom qab qhia cov menyuam kawm ntawv txog yuav ua li cas ib qho tseem ceeb dej yog rau tus neeg, koj yuav muab lawv ib co nthuav thwmsim. Nws yuav tsum hais txog cov "khawv koob" dej rau intrigue menyuam kawm ntawv.

Incidentally, nyob rau hauv cov ntaub ntawv no, ib tug txheej txheem ntawm Science News for KIDS rau cov me nyuam tsis koom nrog ib co kim khoom - nws yog ua tau kom tsis txhob muaj nyob rau ntawm cov khoom thiab cov ntaub ntawv.

Kev "Ice Koob"

Ntawm no yog ib qho piv txwv ntawm cov yooj yim thiab tib lub sij hawm ib qho kev nthuav xyaum ua tej yam nrog dej. Qhov no tsev dej khov sculptures - "koob". yuav tsum tau rau cov xyaum ua tej yam:

• dej;
• ntsev;
• dej khov.

Lub caij - 2:00, li ntawd, nyob rau hauv ib tug ib txwm zaj lus qhia no xyaum ua tej yam tsis tuav. Ua ntej, peb yuav tsum tau ib daim ntawv mus ncuav rau dej khov dej, muab tso rau hauv lub freezer. Tom qab 1-2 xuab moos, tom qab cov dej yog hloov mus rau hauv cov dej khov, entertaining Science News for KIDS yuav mus ntxiv. Yuav kom muaj kev yuav tsum tau 40-50 tiav lawm dej khov.

Chiv, cov me nyuam yuav tsum tau txhab rau lub rooj 18 blocks nyob rau hauv daim ntawv ntawm ib tug square, tawm hauv qhov chaw nyob rau hauv qhov chaw. Tsis tas li ntawd lawv cov pre sprinkling ntau ntsev, yog thov maj mam muab mus rau txhua lwm yam los sib nplaum li interconnected.

Maj mam, tag nrho cov blocks yog kev cob cog rua, thiab koj mus nrog ib tug tuab thiab ntev "koob" ntawm dej khov. Kom nws heev 2 teaspoons ntawm sodium tshuaj dawb thiab 50 tej daim me me ntawm cov dej khov.

Nws yog ua tau, mus zas cov dej, ua kob dej khov sculptures. Raws li ib tug tshwm sim ntawm no yooj yim xyaum ua tej yam Science News for KIDS rau cov me nyuam 9 xyoo yuav ntshiab thiab fascinating science. Koj muaj peev xwm xyaum ua tej yam los sib nplaum dej khov nyob rau hauv daim ntawv ntawm ib tug pyramid los yog pob zeb diamond.

"Tornado" xyaum ua tej yam

Qhov no kuaj tsis tau tshwj xeeb ntaub ntawv, reagents thiab seev. Ua nws cov me nyuam tau rau 10-15 feeb. Rau cov stocks ntawm qhov xyaum ua tej:

• pob tshab yas raj mis nrog ib lub hau;
• dej;
• txhais tau tias kev ntxuav tais diav;
• sequins.

Lub raj mis yuav tsum tau sau 2/3 dej dawb. Ces ntxiv mus rau nws 1-2 dauv cav ntxuav tais diav tshuaj xub npum. Tom qab 5-10 vib nas this mus ncuav rau hauv lub raj mis ib ob peb ntawm pinches ntawm sequins. Nruj nreem muaj hau ntswj cap, ntxeev lub raj mis upside down, tuav lub caj dab thiab lub twist nyob rau hauv lub clockwise kev taw qhia. Ces nres thiab zoo nyob rau hauv lub resulting vortex. Kom txog thaum uas lub sij hawm raws li ib tug "cua daj cua dub" yog ua hauj lwm, koj yuav tsum scroll lub raj mis 3-4 lub sij hawm.

Yog vim li cas yog muaj ib tug "cua daj cua dub" nyob rau hauv lub li ib txwm raj mis?

Thaum ua tus me nyuam yeej vortex tsab ntawv tsa suab tshwm sim zoo sib xws rau tornadoes. Cov kev sib hloov ntawm dej nyob ib ncig ntawm qhov chaw yog vim centrifugal quab yuam. Tus kws qhia ntawv qhia rau cov me nyuam txog yuav ua li cas txaus ntshai cua daj cua dub nyob rau hauv cov xwm.

Xws li ib tug kev yog kev ruaj ntseg kiag, tab sis tom qab cov tshuaj rau cov me nyuam yog hais tiag xav tsis thoob science. Yuav kom xyaum ua tej yam yog ntau striking, nws yog tej zaum yuav siv ib tug colorant, e.g., poov tshuaj permanganate (poov tshuaj permanganate).

Xyaum ua tej yam "npuas"

Koj puas xav mus qhia rau cov me nyuam li cas ib tug entertaining Science News for KIDS? Programs rau cov me nyuam tsis tso cai rau cov xib hwb kom them tribute rau cov zaj lus qhia txog qhov uas, qhov no yog tsuas tsis muaj sij hawm. Yog li ntawd peb hais ntawd los tsis ua cas.

Tub kawm ntawv ntawm qib elementary, lawv yuav coj ib tug ntau ntawm zoo cwj pwm txawv, thiab ua rau nws ua tau rau ib tug ob peb feeb. Peb yuav tsum tau:

• kua soaps;
• thawv;
• dej;
• nyias hlau.

Nyob rau hauv ib lub thawv, sib tov ib feem kua xab npum nrog rau qhov chaw dej. Quav qhov kawg ntawm ib tug me me daim hlau nyob rau hauv daim ntawv ntawm ib tug nplhaib, lowers nws mus rau hauv ib tug xab npum sib tov thiab maj mam muab tshem tawm los ntawm puab, thiab tshuab npuas zoo nkauj tus kheej txiav txim siab.

Rau no xyaum ua tej yam, tsuas yog tsim hlau, tsis muaj ib tug ntaub lis loos txheej. Txwv tsis pub, tshuab npuas cov me nyuam tsis tau.

Yuav kom cov me nyuam nws yog ntau interesting, koj yuav tau ntxiv cov zaub mov coloring xab npum tshuaj. Koj muaj peev xwm npaj ib tug kev sib tw ntawm cov tub ntxhais kawm xab npum, ces Science News for KIDS rau cov me nyuam yuav ua tau ib tug tiag tiag kho. Tus kws qhia ntawv li qhia txog tus notion ntawm cov me nyuam nrog daws, solubility thiab piav txog vim li cas cov tsos ntawm bubbles.

Entertaining kev, "Dej Tsob nroj"

Yuav pib, tus xib fwb qhia txog qhov tseem ceeb ntawm cov dej mus rau lub hlwb nyob rau hauv uas muaj sia nyob. Nws yog los ntawm nws mus thauj mus los ntawm cov as-ham. Tus kws qhia ntawv cov ntsiab lus tawm hais tias nyob rau hauv cov ntaub ntawv ntawm ib tug tsis txaus tus nqi ntawm cov dej nyob rau hauv lub cev ntawm tag nrho cov nyob yam tuag.

yuav tsum tau rau cov xyaum ua tej yam:

• ntsuj plig teeb;
• hlab;
• ntsuab nplooj;
• yas dhos rau kuaj menyuam;
• tooj liab sulfate (2);
• beaker.

Qhov no xyaum ua tej yam yuav yuav tsum tau 1.5-2 sij hawm, tab sis raws li ib tug tshwm sim ntawm cov tshuaj rau cov me nyuam yog ib tug manifestation ntawm ib tug txuj ci tseem ceeb, khawv koob cim.

Ntsuab nplooj twb muab tso rau hauv ib lub raj ruaj nyob rau hauv lub yas dhos. Nyob rau hauv cov nplaim taws ntawm ib tug ntsuj plig teeb 2-3 lub sij hawm uas yuav tsum tau kom sov lub tag nrho lub raj, thiab ces nws yuav ua li cas xwb rau qhov ib feem nyob qhov twg lub ntsuab nplooj.

Khob yuav tsum tau muab tso rau thiaj hais tias cov gaseous tshuaj tso rau hauv vitro, poob mus rau nws. Thaum cua kub tiav, rau lub resulting nco nyob rau hauv cov kua khob, ntxiv dawb nplej ntawm anhydrous tooj liab sulfate. Maj mam tus dawb xim disappears thiab tooj liab sulfate yuav xiav los yog xiav.

Qhov no ua rau yus mus rau ib tug ua tiav delight cov me nyuam, vim hais tias coloring tshuaj hloov ua ntej lawv ob lub qhov muag. Nyob rau hauv xaus, qhov kev paub ntawm tus kws qhia ntawv qhia rau cov me nyuam txog tej zog raws li hygroscopicity. Nws yog vim nws muaj peev xwm mus nqus dej vapor (dej), dawb tooj liab sulfate, hloov nws cov xim rau xim xiav.

Xyaum ua tej yam "Magic Wand"

Qhov no xyaum ua tej yam no yog tsim rau introductory hoob kawm uas tuamyeem kawm no nyob rau hauv Science News for KIDS. Pre ntawm lim daim ntawv yuav tsum ua lub hnub qub zoo li tus preform thiab tsau nws nyob rau hauv ib tug phenolphthalein tshuaj (qhia).

Thaum lub sij hawm xyaum ua tej yam nws tus kheej uas txuas mus rau lub "khawv koob wand" lub hnub qub yog thawj raus nyob rau hauv kev daws ntawm alkali (e.g., sodium hydroxide tshuaj). Me nyuam yuav pom yuav ua li cas nyob rau hauv ib tug ob peb lub vib nas this nws muaj hloov xim, thiab zoo nkaus li kaj liab xim. Ntxiv mus, dawb lias daim ntawv no yog muab tso rau hauv ib qho acid tshuaj (rau cov xyaum ua tej yam yuav pom siv cov hydrochloric acid) thiab cov magenta coloring disappears - cim dua yuav tsis muaj kob.

Yog hais tias lub xeem yog nqa tawm rau cov me nyuam, nyob rau hauv lub chav kawm ntawm qhov xyaum ua tej tus xib fwb hais tias "tshuaj fairy taleas." Piv txwv li, tus hero ntawm cov taleas yuav ua mas me ntsis nas uas xav paub yog vim li cas, nyob rau hauv ib tug tej yam yees siv av yog li muaj ntau yam kaj xim. xib fwb qhia lub tswvyim ntawm "qhia" rau 8-9 qib thiab sau ntawv, dab tsi ntsuas tau muab txhais ib tug acidic ib puag ncig, thiab cov uas tshuaj uas yuav tsum tau los mus txiav txim lub alkaline chaw daws teeb meem.

Kev "Jin tawm ntawm lub raj mis"

Qhov no xyaum ua tej yam ua qhia qhov tseeb kws qhia ntawv, siv tshwj xeeb fume hood. Kev raws li nyob rau hauv tej thaj chaw ntawm concentrated nitric acid. Tsis zoo li ntau acids, feeb meej nitric muaj peev xwm ntawm ib tug niaj tshuaj cov tshuaj tiv thaiv nrog co txheej txheem nyob rau hauv kab hlau ua si tom qab hydrogen (tshwj tsis yog rau platinum, kub).

Lub raj yog tsim nyog los ncuav nws thiab ntxiv mus rau cov tib daim tooj liab hlau. Nyob rau hauv lub hood raj yog rhuab, thiab cov me nyuam saib cov tsos ntawm vapor "qhiav gin."

Rau cov qib 8-9 xib fwb sau kab zauv tshuaj cov tshuaj tiv thaiv allocates tej yam tshwm sim ntawm nws txoj kev kawm (kev hloov ntawm cov xim, tshwm sim los ntawm cov pa roj). Qhov no yog tsis haum rau ib tug ua qauv qhia sab nraum lub tsev kawm ntawv ntawm cov tshuaj txee. Raws li kev ruaj ntseg cov kev cai, nws yuav siv cov lub hood, txij li thaum cov officers ntawm nitrogen oxide ( "xim av roj") sawv cev rau ib tug txaus ntshai rau cov me nyuam.

Cov tsiaj thwmsim

Nyob rau hauv thiaj li yuav whet lub paj ntawm cov tub ntxhais kawm nyob rau hauv Science News for KIDS, nws yog tau muaj ib lub tsev xyaum ua tej yam. Piv txwv li, nqa tawm ib qho kev xyaum ua tej yam loj hlob muaju ntawm ntsev.

Tus me nyuam yuav tsum npaj ib tug nyeem tov ntawm sodium tshuaj dawb. Ces, muab tso rau nws nyob rau hauv ib tug nyias ceg me, thiab tsawg kawg yog evaporating cov dej los ntawm cov tshuaj rau ib ceg yuav "loj hlob" muaju ntawm ntsev.

Rag ntawm cov tshuaj yuav tsis muaj peev xwm ntxias los yog rotated. Thaum 2 lub lis piam mus loj hlob muaju, ib tug stick yuav tsum tau ua tib zoo muab tshem tawm los ntawm cov tshuaj thiab qhuav. Thiab ces, yog koj nyiam cov khoom tej zaum yuav loj nrog cov kua roj vanish.

xaus

Nyob rau hauv lub tsev kawm ntawv cov ntaub ntawv kawm muaj yog ib tug ntau nthuav kawm dua Science News for KIDS. Tab sis nyob rau hauv thiaj li hais tias cov me nyuam twb tsis ntshai ntawm no complex science, tus xibfwb qhia ntawv yuav tsum tau muab nyob rau hauv lub chaw ua hauj lwm txaus lub sij hawm entertaining kev kawm txawj thiab ib tug txawv txawv xyaum ua tej yam.

Nws yog ib cov tswv yim kev txawj ntse, uas yog tsim nyob rau hauv lub chav kawm ntawm no ua hauj lwm, thiab yuav pab mus tsim kho kev txaus siab rau cov kev kawm. Thiab nyob rau hauv lub qis qib yog xam tau tias yog entertaining kev rau lub GEF raws li ywj siab tsim thiab kev tshawb fawb.