Video: Dab tsi yog cov ntxhia uas feem ntau siv rau kev sib tham?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Potassium-Argon (K-Ar) sib tham yog cov feem ntau dav siv cov txheej txheem ntawm radiometric sib tham . Potassium yog ib feem ntawm ntau yam cov minerals thiab tuaj yeem yog siv los txiav txim lub hnub nyoog ntawm igneous thiab metamorphic pob zeb.
Raws li txoj cai, cov pob zeb twg uas feem ntau siv rau kev sib tham zircon?
Ob tug decay chains siv ntawm zircon sib tham yog cov uranium series thiab actinium series. Lub neej ib nrab ntawm cov uranium series yog 4.47 billion xyoo, thiab ib nrab lub neej ntawm actinium series yog 710 lab xyoo. Thaum ib tug grain ntawm ntxhia daim ntawv, lub moos pib ntawm xoom.
Kuj Paub, leej twg ntawm cov isotope hauv qab no feem ntau siv rau cov khoom sib tham? Ib tug ntawm Feem ntau cov isotopes siv nyob rau hauv xov tooj cua sib tham yog uranium-235 lossis U-235.
Ntawm no, dab tsi yog 3 txoj hauv kev sib tw pob zeb?
Ua ke nrog cov hauv paus ntsiab lus stratigraphic, radiometric sib tham Cov txheej txheem yog siv nyob rau hauv geochronology los tsim kom tau lub sij hawm geology. Ntawm cov txheej txheem paub zoo tshaj plaws yog radiocarbon dating, poov tshuaj -argon dating thiab uranium-lead dating.
Dab tsi yog siv rau hnub tim pob zeb thiab cov zaub mov?
Vim tias lawv qhov tshwj xeeb tsis zoo, cov ntsiab lus sib txawv yog siv rau kev sib tham hnub nyoog sib txawv. Piv txwv li, kev lwj ntawm poov tshuaj - 40 rau argon -40 yog siv rau hnub tim pob zeb uas muaj hnub nyoog tshaj 20,000 xyoo, thiab kev lwj ntawm uranium-238 rau coj -206 yog siv rau pob zeb qub tshaj 1 lab xyoo.
Pom zoo:
Dab tsi yog lub pas dej loj ntawm nitrogen uas siv tau los ntawm cov kab mob feem ntau?
Ecology CH 4 thiab 5 Jeopardy Review Teb Cov Ntsiab Lus Ua Si Qhov Kev Ua Si Rov Ua Si! #1 Cov roj twg ua rau 78 feem pua ntawm peb cov huab cua tab sis tuaj yeem siv los ntawm cov nroj tsuag tsuas yog thaum hloov los ntawm cov kab mob ua ntej? nitrogen #4 Dab tsi yog qhov dej loj ntawm nitrogen uas siv tsis tau los ntawm cov kab mob feem ntau? qhov cua
Dab tsi ntawm cov organic molecule feem ntau yog siv los ua lub zog rau cov hlwb?
Adenosine 5'-triphosphate, lossis ATP, yog cov khoom siv hluav taws xob ntau tshaj plaws hauv cov hlwb. Cov molecule no yog tsim los ntawm nitrogen puag (adenine), ribose qab zib, thiab peb pawg phosphate. Lo lus adenosine yog hais txog adenine ntxiv rau ribose qab zib
Dab tsi yog lub hauv paus ntawm feem ntau yaj cov ntxhia hauv dej hiav txwv?
Dissolved los ntawm kev xyaum tag nrho cov khib nyiab thiab pob zeb, tab sis tshwj xeeb tshaj yog los ntawm limestone, dolomite, thiab gypsum, calcium (Ca) thiab magnesium (Mg) muaj nyob rau hauv ntau ntau nyob rau hauv ib co brines.Magnesium yog tam sim no nyob rau hauv loj ntau nyob rau hauv dej hiav txwv dej. Nws ua rau feem ntau ntawm hardness thiab scale-forming zog ntawm dej
Cov xim dab tsi yog cov hlwb feem ntau ua ntej siv thawj cov xim rau cov txheej txheem Gram stain?
Ua ntej, siv lead ua violet, thawj stain, yog siv rau lub tshav kub-tso smear, muab tag nrho cov hlwb xim liab
Qhov twg ntawm cov ntsiab lus hauv qab no feem ntau pom nyob rau hauv feem ntau cov chiv?
Cov tshuaj chiv niaj hnub suav nrog ib lossis ntau tshaj ntawm peb lub ntsiab lus tseem ceeb tshaj plaws hauv cov zaub mov noj: nitrogen, phosphorus, thiab potassium. Qhov tseem ceeb thib ob yog cov ntsiab lus sulfur, magnesium, thiab calcium