The carbon and hydrologic cycles?
send all matter into the solid earth to stay forever
have no beginning and no end; they just go on and on
operate in complete isolation to the physical systems of the earth
have been discontinued because of lack of interest in them by high school students

Ineed , i need to create a power point in life science here is a picture explaining a little what the topic is about, me with some information for my slides : (

Which are practical examples of how people in the developed world could make a big difference in how much water they use check all that apply a. use lightbulbs that use less electricity b. consider using a composting toilet that does not use water c. avoid using your telephone during peak hours d. do not read books

What three colors are on the rwandan flag that was adopted in 2001