Grade Practice Test | Lumos Learning

Grade4Quiz Wordlist 16

Grade4Quiz

Wordlist 16

Match the word to its definition.

Astronaut
A person who is trained to travel in a spacecraft. The curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.
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Match the word to its definition.

Radiation
Causing or likely to cause harm The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.