Match the following.
a. volcanic cone
b. tropical storm
c. subtropical
d. isthmus
1. land bridge connecting two continents
2. area between thirty and forty degrees latitude with temperatures that remain above 32°F (0° C) year round
3. strong thunderstorms with circular winds of thirty-nine to seventy-three m.p.h.
4. a hill or mountain that builds up around the vent of a volcano