By the Time the Universe Was 5 Minutes Old,approximately 24

question 45

Multiple Choice

By the time the universe was 5 minutes old,approximately 24 percent of the normal matter in it had been turned into

• A) protons.
• B) neutrons.
• C) hydrogen.
• D) helium.

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Definitions:

Digits

The fingers and toes of humans and other tetrapods, which are used for manipulation and sensing.

Tarsals

A group of seven bones in the foot that form the ankle and proximal part of the instep.

Brachial Region

The region of the upper arm or the extension of the shoulder to the elbow.

Upper Arm

The region of the arm between the shoulder and the elbow, containing muscles like the biceps brachii.