Chemical sedimentary rock is formed from which of these?
A. solutions of dissolved minerals
B. layers of organic material from things that
were once living
C. little pieces of weathered rock pushed
together
D. a combination of feldspar and silica

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

The coco river is a natural border between nicaragua and which other country

Match the graph type to its description. 1. uses symbols to describe information pie 2. compares different quantities at the same point in time line 3. compares increases and decreases in a quantity over a period of time bar 4. shows the relationship of parts to each other and to the whole pictograph