Question

1. what does our brain do during sleep? *

use up all extra energy not used during the day
process your memories and experiences from the day
take a break from repairing your body
shuts off and does no activity

1. how much sleep does the average adult need? *

3 - 5 hours a night
5 - 7 hours a night
7 - 9 hours a night
9 - 11 hours a night

Explanation:

1. During sleep, the brain processes memories and experiences from the day. It is not about using up extra energy in that way, it doesn't take a break from body - repair as body - repair also occurs during sleep, and the brain never completely shuts off.
2. The average adult needs 7 - 9 hours of sleep a night for optimal physical and mental functioning.

Answer:

1. Process your memories and experiences from the day
2. 7-9 hours a night