Section+2.2

Matter-Anything that occupies space and has mass. Life is composed of matter.

Element- A substance that can't be broken into any other substance

Elements that make up 96% of the human body: Oxygen Carbon Hydrogen Nitrogen

Elements that make up most of remaining 4% of the human body: Calcium Phosphorus Potassium Sulfur

Trace Element- Elements essential to an organism, but only in small quantities.

Trace elements that are essential to some organisms Chromium Cobalt Copper Fluorine Iodine Iron Manganese Molybdenum Selenium Sicilcon Tin Vanadium Zinc