He wondered if there was life on other planets.
Meaning: This describes the boy thinking about whether there are living things on other planets.
Choice of Words: Wonder means to think about something in a curious or thoughtful way. Life means the existence of living things. Planets are large, round objects that orbit the sun. When you put these words together, you get a sense of the boy's curiosity about the possibility of life existing beyond Earth.
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Related Expressions