Question 1
The dominant rock type erupted by submarine volcanoes at spreading ridges is ________.
◦ magnetite
◦ andesite
◦ basalt
◦ rhyolite
Question 2
Match the letter on the figure with the term.
Identify what letter A represents in the diagram.
◦ bomb
◦ lava flow
◦ magma chamber
◦ vent
◦ pyroclastic material