
Efnafræði
Authored by Gulla Úlfars
Science
6th - 8th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hver er munurinn á efnasambandi og efnablöndu ?
Það er enginn munur
Efnasamband er með allar sameindir eins en efnablanda ólíkar
Efnablanda er bara mjólk
efnasamband er bara vatn
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvað er frumefni '
Efni búið til úr frumum
Efni sem er hægt að breyta
Efni úr einni gerð frumeinda
Algengustu efnin í kring um okkur
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Merkið við það sem eru frumefni.
Járn = Fe
Koltvísýringur = CO2
Vatn = H2O
Vetni = H
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lotukerfið hvað er það ?
Tafla þar sem öll frumefnin eru sett upp
Tafla með skrítnum stöfum og númerum
Kerfi þar sem hægt er að tengja saman efni
Hef aldrei heyrt um það
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvað er frumeind?
Það sama og fruma
Það sama og öreind eða róteind, rafeind og nifteind
Sameindir festar saman
Minnsta eining efnis
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvað er mælt með pH gildi
Hversu súrt efni er
Hversu grænt efni er
Hversu mikið vatn er í efni
Hversu hollt efni er
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvað er sameind
Eindir í efni sem eru á föstu
Frumeindir sem tengjast saman
Frumefni
Það sem við sjáum í kring um okkur
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