When Were Most of the Existing Lava Plains Formed on the Surface

question 237

Multiple Choice

When were most of the existing lava plains formed on the surface of Mercury?

• A) never-there is no evidence of lava flows on the surface of Mercury
• B) when Mercury was first formed, about 4.5 billion years ago
• C) near the end of the era of heavy bombardment, about 3.8 billion years ago
• D) when the crust wrinkled to form the scarps

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Definitions:

Age

the length of time that a person or object has existed or the period during which an organism has lived.

Prospective Memory

Refers to the ability to remember to perform actions in the future, such as remembering to take medication at a certain time.

Tip-Of-The-Tongue

A cognitive phenomenon where a person cannot fully retrieve a word but has a partial recall or feels that retrieval is imminent.

Memory Aids

Tools or techniques used to enhance or improve the ability to remember information.