Earth is divided into its eastern and western hemispheres by the

a) lines of latitude
b) prime meridian
c) equator
d) lines of longitude

How can you keep track of variables in a science experiment?

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

Chicken pox and hepatitis are bacterial diseases. true or false?