Based on Counting the Number of Galaxies in a Small

question 39

Multiple Choice

Based on counting the number of galaxies in a small patch of the sky and multiplying by the number of such patches needed to cover the entire sky,the total number of galaxies in the observable universe is estimated to be approximately

• A)100 million.
• B)1 billion.
• C)10 billion.
• D)100 billion.
• E)1 trillion.

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Definitions:

Forebrain

The anterior part of the brain that includes the cerebrum and structures such as the thalamus and hypothalamus, involved in complex behavioral and cognitive processes.

Thalamus

A crucial brain structure involved in relaying sensory and motor signals to the cerebral cortex, and in regulating consciousness, sleep, and alertness.

Muscles

Soft tissues found in most animals that produce force and motion through contraction and are essential for bodily movement, posture, and balance.

Cerebellum

A region of the brain that plays a significant role in motor control, and is also involved in cognitive functions such as attention and language.