Glaciers can only form when
a. there is an ice age.
b. there is a u-shaped valley in the mountains.
c. the amount of snow exceeds the amount of rain.
d. more snow falls than melts.

What season is it in the southern hemisphere when it’s december? a) fall b) spring c) winter d) summer

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

What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?