Volcanoes Reading Comprehension

READ THE FOLLOWING TEXT AND ANSWER THE QUESTION THAT FOLLOW

There is a lot of volcanic activity at divergent plate boundaries in the oceans. For example, many undersea volcanoes are found along the Mid-Atlantic Ridge. This is a divergent plate boundary that runs north-south through the middle of the Atlantic Ocean. As tectonic plates pull away from each other at a divergent plate boundary, they create deep fissures, or cracks, in the crust. Molten rock, called magma, erupts through these cracks onto Earth’s surface. At the surface, the molten rock is called lava. It cools and hardens, forming rock. Divergent plate boundaries also occur in continental crust. Volcanoes form at these boundaries, but less often than in ocean crust. That’s because continental crust is thicker than oceanic crust. This makes it more difficult for molten rock to push up through the crust.

Many volcanoes form along convergent plate boundaries where one tectonic plate is pulled down beneath another at a subduction zone. The leading edge of the plate melts as it is pulled into the mantle, forming magma that erupts as volcanoes. When a line of volcanoes forms along a subduction zone, they make up a volcanic arc. The edges of the Pacific plate are long subduction zones lined with volcanoes. This is why the Pacific rim is called the “Pacific Ring of Fire.”

The only place where the mid-Atlantic ridge is above sea level is:

• Iceland

• England

• Greenland

• none of the above

READ THE FOLLOWING TEXT AND ANSWER THE QUESTION THAT FOLLOWS

There is a lot of volcanic activity at divergent plate boundaries in the oceans. For example, many undersea volcanoes are found along the Mid-Atlantic Ridge. This is a divergent plate boundary that runs north-south through the middle of the Atlantic Ocean. As tectonic plates pull away from each other at a divergent plate boundary, they create deep fissures, or cracks, in the crust. Molten rock, called magma, erupts through these cracks onto Earth’s surface. At the surface, the molten rock is called lava. It cools and hardens, forming rock. Divergent plate boundaries also occur in continental crust. Volcanoes form at these boundaries, but less often than in ocean crust. That’s because continental crust is thicker than oceanic crust. This makes it more difficult for molten rock to push up through the crust.

Many volcanoes form along convergent plate boundaries where one tectonic plate is pulled down beneath another at a subduction zone. The leading edge of the plate melts as it is pulled into the mantle, forming magma that erupts as volcanoes. When a line of volcanoes forms along a subduction zone, they make up a volcanic arc. The edges of the Pacific plate are long subduction zones lined with volcanoes. This is why the Pacific rim is called the “Pacific Ring of Fire.”

Volcanoes form at___________.

• hot spots

• divergent plate boudaries

• convergent plate boundaries

• all of the above

READ THE FOLLOWING TEXT AND ANSWER THE QUESTION THAT FOLLOWS

There is a lot of volcanic activity at divergent plate boundaries in the oceans. For example, many undersea volcanoes are found along the Mid-Atlantic Ridge. This is a divergent plate boundary that runs north-south through the middle of the Atlantic Ocean. As tectonic plates pull away from each other at a divergent plate boundary, they create deep fissures, or cracks, in the crust. Molten rock, called magma, erupts through these cracks onto Earth’s surface. At the surface, the molten rock is called lava. It cools and hardens, forming rock. Divergent plate boundaries also occur in continental crust. Volcanoes form at these boundaries, but less often than in ocean crust. That’s because continental crust is thicker than oceanic crust. This makes it more difficult for molten rock to push up through the crust.

Many volcanoes form along convergent plate boundaries where one tectonic plate is pulled down beneath another at a subduction zone. The leading edge of the plate melts as it is pulled into the mantle, forming magma that erupts as volcanoes. When a line of volcanoes forms along a subduction zone, they make up a volcanic arc. The edges of the Pacific plate are long subduction zones lined with volcanoes. This is why the Pacific rim is called the “Pacific Ring of Fire.”

Many volcanoes are located ____________.

• within the Eurasian plate

• at the edges of the Pacific plate

• within the North American plate

• at the edges of the Atlantic plate

READ THE FOLLOWING TEXT AND ANSWER THE QUESTION THAT FOLLOWS

There is a lot of volcanic activity at divergent plate boundaries in the oceans. For example, many undersea volcanoes are found along the Mid-Atlantic Ridge. This is a divergent plate boundary that runs north-south through the middle of the Atlantic Ocean. As tectonic plates pull away from each other at a divergent plate boundary, they create deep fissures, or cracks, in the crust. Molten rock, called magma, erupts through these cracks onto Earth’s surface. At the surface, the molten rock is called lava. It cools and hardens, forming rock. Divergent plate boundaries also occur in continental crust. Volcanoes form at these boundaries, but less often than in ocean crust. That’s because continental crust is thicker than oceanic crust. This makes it more difficult for molten rock to push up through the crust.

Many volcanoes form along convergent plate boundaries where one tectonic plate is pulled down beneath another at a subduction zone. The leading edge of the plate melts as it is pulled into the mantle, forming magma that erupts as volcanoes. When a line of volcanoes forms along a subduction zone, they make up a volcanic arc. The edges of the Pacific plate are long subduction zones lined with volcanoes. This is why the Pacific rim is called the “Pacific Ring of Fire.”

Volcanoes form in a subduction zone where a tectonic plate ________.

• is pulled down into the mantle

• remains over a hot spot

• pulls away from another plate

• creates a rift valley