chlorophyll

The green coloring matter of plants that is found in chloroplasts and is necessary for photosynthesis


Hemisphere

One of the halves of the earth as divided by the equator. There is a northern and southern half.


photosynthesis

The process by which plants that contain chlorophyll make carbohydrates from water and from carbon dioxide in the air in the presence of light.


structure

Something constructed or arranged in a definite pattern of organization.