Unit 3: The Mind

How much do you know? What do you know about your brain?

Your brain include many cells called ' neurons'. How many neurons does a typical brain have?

• One hundred thousand

• One hundred million

• One hundred billion

What percentage of the brain is water?

• 20%

• 75%

• 90%

At what age does the brain stop growing?

• 12 years old

• 18 years old

• never

What type of activity helps to create connections between neurons throughout your life?

• physical exercise

• mental activity

• sleeping

Approximately how many thoughts do we have each day?

• 1,000

• 10,000

• 50,000

How long the human brain can last without oxygen before it is damaged?

• five minutes

• ten minutes

• half an hour