1. Where do most volcanoes occur? Why? 2. What is needed for magma to form?
3. If a volcano is dormant, can it become active? Can it become extinct?

Distance that the transcontinental railroad covered from omaha to san francisco.

Solve for r in the formula v = ir, when i = 5 and v = 15.

Match the term with the corresponding definition. 1. mountains 2. geographic position 3. latitude 4. oceans 5. pressure 6. land vs. water a. affects temperature by influencing the seasonal range of solar intensity b. despite being at similar latitudes, continental locations have a larger seasonal range in temperature than waterfront locations c. local topography predict temperature and precipitation d. thinner air less able to hold heat makes climate colder e. sea surface temperature influences air temperature and evaporation rates f. affects temperature, moisture, and storm tracks