Approximately How Old Are the Erosion Channels Seen on the Surface

question 94

Multiple Choice

Approximately how old are the erosion channels seen on the surface of Mars?

• A) 3 billion years
• B) 4.6 billion years
• C) 1 billion years
• D) 500 million years

---

Definitions:

Normal Development

The typical progression through different stages of physical, cognitive, emotional, and social growth expected at certain ages.

Blood

A vital fluid in humans and animals that delivers necessary nutrients and oxygen to the cells and carries away waste products.

Mother

A female parent of a child or offspring.

Baby

A very young child, especially one newly or recently born.