In Recent Years,physical Education Classes in School When Offered

question 10

Multiple Choice

In recent years,physical education classes in school when offered

• A)have become longer and more rigorous.
• B)are more likely to be required of all students.
• C)are one hour once weekly.
• D)are more popular among older adolescents.

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Definitions:

Diene

Organic compounds that contain two double bonds.

HBr

Hydrobromic acid, a diatomic molecule consisting of hydrogen and bromine, used commonly in organic synthesis and as a reagent.

Control

In the context of experiments, a standard condition or treatment that does not change, used as a benchmark to measure the effects of the experimental variable.

Activation Energies

The minimum amount of energy required to initiate a chemical reaction.