Science Exam, Fourth Grade

It is the most important organ of the Central Nervous System.

• Spinal cord

• Brain

• cerebellum

• brainstem

Is protected by vertebrae:

• spinal cord

• brain

• cerebellum

• brainstem

The Central Nervous System is made up of brain and cerebellum.

• True

• False

The air we breathe contains a great amount of oxygen.

• Exhalation

• Breathing

• Inhalation

• Blood circulation

They are the smallest blood vessels. Their name comes from the word hair.

• Veins

• Arteries

• Capillaries

• Arterioles

Is protected by Skull:

• The brain

• The spinal cord

• The cerebellum

• The brainstem

Is made up of blood plasma, red blood cells, white blood cells, and platelets.

• Heart

• blood

• Oxygen

• blood circulation

Tissue that makes up the cortex:

• Gray matter

• Meninges

• yellow matter

• nerve cord

Is a disease of the circulatory system:

• Headache

• stomache

• varicose veins

• glaucoma

The air we exhale contains:

• a great amount of oxygen and a little of carbon dioxide.

• Only water vapor

• a little oxygen but great amount of carbon dioxide

• Only oxygen