Which type of magma is light in color, low density, high in Silica and is explosive when erupts?

Wegeners theory of continental drift states that the continents have changed throughout history while the theory of plate tectonics

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade

Where was oil production at its highest in the 1980s and still remains important to the russian economy? central asia the ural mountains russian siberia the caucasus region