Auðvitað - Heimilið bls. 10-15 og 22-40
Quiz
•
Chemistry
•
6th - 7th Grade
•
Practice Problem
•
Medium
Sara Helgadóttir
Used 87+ times
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21 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Hvað eru frumeindir?
Allt sem búið er til úr frumum
Minnstu byggingareiningar allra efna
Fyrstu eindirnar sem fundust á jörðinni
Efni sem ekki geta tengst öðrum efnum
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Hve margar tegundir frumefna þekkjast í náttúrunni?
50
4
100
90
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Andrúmsloftið er:
Frumefni
Efnasamband
Efnablanda
Aðeins ein tegund lofttegunda
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Matarsalt hefur efnaformúluna NaCl. Salt er:
Efnasamband
Frumefni
Efnablanda
Ein sameind
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Hverju er lýst: „Í ________________ eru allar sameindir eins þó svo að þær séu úr fleiri en einni gerð frumeinda."
Sameindalíkani
Efnablöndu
Efnasambandi
Frumefni
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Hvort þenjast lofttegundir eða föst efni meira út við hitun?
Lofttegundir
Föst efni
Þenjast jafn mikið
Hvorugt þenst út
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Hvenær eru lausnir sagðar mettaðar?
Þegar ekki sést lengur í gegnum lausnina
Þegar ekki er hægt að leysa upp meira af efni í þeim við ákveðinn hita
Þegar varmi myndast
Þegar lausnin hefur verið kæld í 0°C
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