How is earth's lithosphere like a jigsaw puzzle? how is it not?

what conditions are required for fossils to form? given these conditions and knowledge of geologic cycles, how reasonable is it that there are gaps in the fossil record

The mantle is made up of which structural zones?

Reading graphs: unemployment us unemployment rate (1961-2011) identify the trends in the graph and then use the drop- down menu to complete each statement from 1961 to 1965 unemployment was in the mid-2000s through 2011. unemployment was percentage unemployed 1961 1971 1981 1991 2001 2011 year

Can someone me? i need to have this done as soon as possible! i'm putting 20 points on this!