Although Most Meteorites Have Ages Around 4

question 30

Multiple Choice

Although most meteorites have ages around 4.5 billion years, a small subset has ages around 1.3 billion years.What caused the substantial difference in age between these two populations of meteorites?

• A) These meteorites just happened to form later than most meteorites.
• B) Not all meteorites hit Earth in the early Solar System.We should expect to find younger meteorites as more meteors pass through the atmosphere.
• C) The younger meteorites were created when a protoplanet collided with Earth, creating the Moon.The leftover fragments became meteorites.
• D) These meteorites were thrown into space after an impact with Mars and afterward some happened to collide with Earth.
• E) The younger ones are the result of comets repeatedly passing close to the Sun, melting their surfaces and making them appear younger.

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Definitions:

Neurons

Specialized cells transmitting nerve impulses; the basic building blocks of the nervous system.

Somatic Nervous System

Division of the PNS consisting of nerves that carry information from the senses to the CNS and from the CNS to the voluntary muscles of the body.

Primary Visual Cortex

The region of the brain located in the occipital lobe that is responsible for processing visual information.

Occipital Lobe

Section of the brain located at the rear and bottom of each cerebral hemisphere containing the primary visual centers of the brain.