Rills, gullies, streams, rivers and tributaries are all caused by
a.
land erosion
c.
soil erosion
b.
water erosion
d.
river erosion

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