10
AssignmentMultiple Choice

Building Blocks of Life

Question 10 • 2026 Summer 305 CR_2002040-M/J Comprehensive Science 1

Which elements make up a water molecule?

Answer
A
hydrogen and nitrogen
B
oxygen and nitrogen
C
oxygen and carbon
D
hydrogen and oxygen

Explanation

A water molecule has the chemical formula H₂O. The H stands for hydrogen and the O stands for oxygen, so water is made of hydrogen and oxygen.

AI-written and checked against the verified answer.

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