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What is physical science?

Physical science is a branch of science that focuses on the study of matter and energy.

Physical science is a branch of science that focuses on the study of living things.

Physical science is a branch of science that focuses on the study of rocks and Earth movements.

Physical science is a branch of science that focuses on the study of the universe.

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The best answer is:

Physical science is a branch of science that focuses on the study of matter and energy.