Point out two changes that occur between the 65 mya time period and the present.

Point out two changes that occur between the 65 mya time period and the present. India has collided with Asia to form the Himalayas. Australia has separated from Antarctica. A rift valley is forming in east Africa. North and South America have joined.

What is the difference between a convergent and a divergent plate boundary?

What is the difference between a convergent and a divergent plate boundary? Convergent plates move together; divergent plates move apart.

Why did Alfred Wegener believe that all of the continents once had been joined?

Why did Alfred Wegener believe that all of the continents once had been joined? The edges looked as if they would fit together like the pieces of a puzzle.

How does uplift contribute to the rock cycle? a. It buries sediment, which becomes sedimentary rock. b. It creates very strong pressure, creating metamorphic rock. c. It brings metamorphic and igneous rock to the surface. d. none of the above

How does uplift contribute to the rock cycle? a. It buries sediment, which becomes sedimentary rock. b. It creates very strong pressure, creating metamorphic rock. c. It brings metamorphic and igneous rock to the surface. d. none of the above

Continental-continental plate collisions produce ____. a. island arcs b. rift valleys c. deep-sea trenches d. very tall mountain ranges

Continental-continental plate collisions produce ____. a. island arcs b. rift valleys c. deep-sea trenches d. very tall mountain ranges

Seafloor spreading occurs because _____. a. new material is being added to the asthenosphere b. earthquakes break apart the ocean floor c. sediments accumulate at the area of spreading d. molten material beneath Earth's crust rises to the surface

Seafloor spreading occurs because _____. a. new material is being added to the asthenosphere b. earthquakes break apart the ocean floor c. sediments accumulate at the area of spreading d. molten material beneath Earth's crust rises to the surface

____ are formed when two continental plates collide. a. Volcanoes b. Strike-slip faults c. Mountain ranges d. Rift valleys

____ are formed when two continental plates collide. a. Volcanoes b. Strike-slip faults c. Mountain ranges d. Rift valleys

What does subduction do? a. lifts new rock to the surface b. erodes surface rock making sediment c. takes rock into Earth where it will be melted d. places tension on rocks so that they pull apart

What does subduction do? a. lifts new rock to the surface b. erodes surface rock making sediment c. takes rock into Earth where it will be melted d. places tension on rocks so that they pull apart

Plates of the lithosphere float on the ____. a. crust b. asthenosphere c. core d. atmosphere

Plates of the lithosphere float on the ____. a. crust b. asthenosphere c. core d. atmosphere

Scientists have observed that the plates move at rates ranging from 1 cm to 12 cm per _____. a. century b. decade c. day d. year

Scientists have observed that the plates move at rates ranging from 1 cm to 12 cm per _____. a. century b. decade c. day d. year

The hypothesis that continents have slowly moved to their current locations is called ____. a. continental drift b. continental slope c. magnetic reversal d. convection

The hypothesis that continents have slowly moved to their current locations is called ____. a. continental drift b. continental slope c. magnetic reversal d. convection

The Appalachian Mountains in the eastern United States are rounded and have soil where trees can grow. The Rocky Mountains in the western United States are rugged and have much rock exposed. Which of the following statements is true? a. The Appalachian Mountains are younger, and have experienced more erosion. b. The Rocky Mountains are younger, and have experienced less erosion. c. The Appalachian Mountains are older, and have experienced less weathering. d. The Rocky Mountains are older and have experienced more erosion.

The Appalachian Mountains in the eastern United States are rounded and have soil where trees can grow. The Rocky Mountains in the western United States are rugged and have much rock exposed. Which of the following statements is true? a. The Appalachian Mountains are younger, and have experienced more erosion. b. The Rocky Mountains are younger, and have experienced less erosion. c. The Appalachian Mountains are older, and have experienced less weathering. d. The Rocky Mountains are older and have experienced more erosion.

Plates move apart at ____ boundaries. a. convergent b. stable c. divergent d. transform

Plates move apart at ____ boundaries. a. convergent b. stable c. divergent d. transform

At an oceanic-oceanic convergent plate boundary, ____. a. new crust is created b. old crust is recycled by subduction c. old crust is deformed or fractured d. plates side past one another

At an oceanic-oceanic convergent plate boundary, ____. a. new crust is created b. old crust is recycled by subduction c. old crust is deformed or fractured d. plates side past one another

A ____ can also form when two oceanic plates collide. a. hot spot b. line of volcanoes c. transform boundary d. rift valley

A ____ can also form when two oceanic plates collide. a. hot spot b. line of volcanoes c. transform boundary d. rift valley

The downward part of a convection current causes a sinking force that ____. a. pulls tectonic plates toward one another b. moves plates apart from one another c. lifts and splits the lithosphere d. creates a divergent boundary

The downward part of a convection current causes a sinking force that ____. a. pulls tectonic plates toward one another b. moves plates apart from one another c. lifts and splits the lithosphere d. creates a divergent boundary

What is one way continents get bigger? a. Weathering and erosion build them up. b. Rifting causes them to grow. c. Tectonic plates carry other segments of land to them. d. Earthquakes add to the coast.

What is one way continents get bigger? a. Weathering and erosion build them up. b. Rifting causes them to grow. c. Tectonic plates carry other segments of land to them. d. Earthquakes add to the coast.

The _____ is (are) an example of a transform boundary. a. Appalachian Mountains b. Himalaya c. Mid-Atlantic Ridge d. San Andreas Fault

The _____ is (are) an example of a transform boundary. a. Appalachian Mountains b. Himalaya c. Mid-Atlantic Ridge d. San Andreas Fault

The result of plate movement can be seen at ____. a. abyssal plains b. ocean margins c. plate centers d. plate boundaries

The result of plate movement can be seen at ____. a. abyssal plains b. ocean margins c. plate centers d. plate boundaries

What type of plate boundary occurs between the North American Plate and the Eurasian Plate, shown in the figure above? a. transform boundary b. divergent boundary c. convergent oceanic- continental plate boundary d. convergent oceanic- oceanic plate boundary

What type of plate boundary occurs between the North American Plate and the Eurasian Plate, shown in the figure above? a. transform boundary b. divergent boundary c. convergent oceanic- continental plate boundary d. convergent oceanic- oceanic plate boundary

What type of plate boundary occurs between the Nazca Plate and the South American Plate, shown in the figure above? a. convergent oceanic-continental plate boundary b. convergent oceanic-oceanic plate boundary c. convergent continental- continental plate boundary d. transform boundary

What type of plate boundary occurs between the Nazca Plate and the South American Plate, shown in the figure above? a. convergent oceanic-continental plate boundary b. convergent oceanic-oceanic plate boundary c. convergent continental- continental plate boundary d. transform boundary

The youngest part of the ocean floor is found ____. a. along deep sea trenches b. where ocean sediments are thickest c. near ocean ridges d. where Earth’s magnetic field changes polarity

The youngest part of the ocean floor is found ____. a. along deep sea trenches b. where ocean sediments are thickest c. near ocean ridges d. where Earth’s magnetic field changes polarity

Plates move apart at _____ boundaries. a. convergent b. stable c. divergent d. transform

Plates move apart at _____ boundaries. a. convergent b. stable c. divergent d. transform

Crust is neither destroyed nor formed along which of the following boundaries? a. convergent b. divergent c. transform d. magnetic

Crust is neither destroyed nor formed along which of the following boundaries? a. convergent b. divergent c. transform d. magnetic

The Himalayan mountain range of India was formed at a ____. a. convergent boundary b. divergent boundary c. hot spot d. transform boundary

The Himalayan mountain range of India was formed at a ____. a. convergent boundary b. divergent boundary c. hot spot d. transform boundary

Plates slide past one another at ____. a. subduction zones b. transform boundaries c. convection currents d. divergent boundaries

Plates slide past one another at ____. a. subduction zones b. transform boundaries c. convection currents d. divergent boundaries

The Great Rift Valley in Africa is a _____. a. mid-ocean ridge b. divergent boundary c. convergent boundary d. transform boundary

The Great Rift Valley in Africa is a _____. a. mid-ocean ridge b. divergent boundary c. convergent boundary d. transform boundary

The presence of the same ____ on several continents supports the hypothesis of continental drift. a. fossils b. rocks c. neither a nor b d. both a and b

The presence of the same ____ on several continents supports the hypothesis of continental drift. a. fossils b. rocks c. neither a nor b d. both a and b

Which is a way scientists have been able to study Earth’s interior? a. measuring earthquake waves as they travel through Earth’s surface b. gathering samples from the liquid outer core c. weighing rocks found near the outer core determining their densities d. digging deep wells into Earth’s core

Which is a way scientists have been able to study Earth’s interior? a. measuring earthquake waves as they travel through Earth’s surface b. gathering samples from the liquid outer core c. weighing rocks found near the outer core determining their densities d. digging deep wells into Earth’s core

_____ are formed when two continental plates collide. a. Volcanoes b. Strike-slip faults c. Mountain ranges d. Rift valleys

_____ are formed when two continental plates collide. a. Volcanoes b. Strike-slip faults c. Mountain ranges d. Rift valleys

Active volcanoes are most likely to form at ____. a. transform boundaries b. divergent boundaries c. the center of continents d. convergent oceanic–continental boundaries

Active volcanoes are most likely to form at ____. a. transform boundaries b. divergent boundaries c. the center of continents d. convergent oceanic–continental boundaries

The youngest rocks on the ocean floor are located _____. a. near continents b. at mid-ocean ridges c. far from mid-ocean ridges d. near Asia

The youngest rocks on the ocean floor are located _____. a. near continents b. at mid-ocean ridges c. far from mid-ocean ridges d. near Asia

Features found at divergent plate boundaries include ____. a. mid-ocean ridges b. deep-sea trenches c. crumpled mountains d. island arc volcanoes

Features found at divergent plate boundaries include ____. a. mid-ocean ridges b. deep-sea trenches c. crumpled mountains d. island arc volcanoes

Plates collide at _____ boundaries. a. convergent b. stable c. divergent d. transform

Plates collide at _____ boundaries. a. convergent b. stable c. divergent d. transform