
ICT教育論 課題
Quiz
•
Science
•
7th Grade
•
Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
2H₂O → 2H₂ + O₂
という反応が起きて水が水素と酸素に分解される。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
2HCI + Zn → H₂ + ZnCI₂
という反応が起きて水素が発生する。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
化学変化とは物質そのものが別の物質に変わる変化のこと。
例:燃焼、酸化、分解など
鉄がさびる現象は
4Fe + 3O₂ → 2Fe₂O₃
の化学反応式で表され、新たな物質ができている。
ほかの選択肢は物質の状態が変わっただけで(物理変化)別の物質は生成されていない。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
原子は、物質を構成する最小の単位となる粒子のことなのでこれ以上分解できない。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Answer explanation
純物質とは、1種類の物質だけでできている物質のことである。基本的に1つの化学式であらわされるものは純物質である。
例:二酸化炭素(CO₂)
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