5
lesson pretestMultiple Choice

Pretest

Question 5 • Chemistry

Which is an example of plasmas in nature?

Answer
A
plasma balls
B
auroras
C
clouds
D
solar cells

Explanation

Auroras are produced when charged particles interact with gases in Earth’s upper atmosphere, creating glowing ionized gas, or plasma. Clouds are made mostly of water droplets and ice crystals, while solar cells and plasma balls are human-made devices.

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