1. Convection currents drive plate movement and move in the following manner: As magma heats it becomes _____and begins to______As magma cools it becomes_____ and ______
H) more dense, sinks; less dense, rises
B) more dense, rises; less dense, sinks
K) less dense, rises; more dense, sinks
Z) less dense, sinks; more dense, rises
2. What occurs when two plates come together and the denser plate is forced under back into the mantle?
U) reduction
(H) subduction
(R) conduction
W) convection
3. A volcano that has erupted in the past 10,000 years is classified as...
A) dormant
G) extinct
V) active
4. Volcanoes cannot occur at a___
Y) convergent boundary
N) divergent boundary
C) hot spot
(Z) trick question! Volcanoes can occur at all 3 places!
Choose one answer for each question
1. H) more dense, sinks; less dense, rises
2. H) subduction
3. V) active
4. Z) trick question! Volcanoes can occur at all 3 places!