Plate Tectonics Chapter 9 Rogers 8th

Multiple Choice

What did Alfred Wegener name the huge land mass where all continents were connected?

• Gondwana

• Laurasia

• Pangea

• Atlantis

Multiple Choice

What is the main idea of the Continental Drift Hypothesis?

• The Earth is flat

• Continents are stationary

• Continents were once connected and have drifted apart

• The Earth is expanding

Multiple Choice

What evidence supports the idea that continents fit together like puzzle pieces?

• Climate clues

• Fossil clues

• Rock clues

• All of the above

Multiple Choice

What type of plant fossil is mentioned as evidence for continental drift?

• Mesosaurus

• Glossopteris

• Caledonian

• Appalachian

Multiple Choice

Why couldn't scientists drill to the flowing magma according to the document?

• The technology was too advanced

• The magma was too hot

• They couldn't drill far enough

• The magma was too deep

Multiple Choice

What technological development was used after WWII to explore the seafloor?

• Radar

• Echo sounders

• Sonar

• GPS

Multiple Choice

What type of rock is formed when magma cools on the ocean surface?

• Granite

• Basalt

• Limestone

• Sandstone

Multiple Choice

What is the role of the mid-ocean ridge in seafloor topography?

• It is a site of sediment accumulation

• It is a site of new crust formation

• It is a site of crust erosion

• It is a site of tectonic plate destruction

Multiple Choice

What is true about the direction of Earth's magnetic field?

• It is always constant

• It changes every day

• It is not constant

• It never changes

Multiple Choice

What happens during a magnetic reversal?

• The magnetic field disappears

• The magnetic field strengthens

• The magnetic field reverses direction

• The magnetic field weakens

Multiple Choice

How often does Earth's magnetic field reverse?

• Every year

• Every century

• It varies and is not constant

• Every decade

Multiple Choice

What is the primary component of basalt that interacts with the Earth's magnetic field?

• Silica

• Iron

• Calcium

• Sodium

Multiple Choice

What tool did scientists use to measure and record the magnetic signature of rocks near the mid-ocean ridge?

• Seismometer

• Magnetometer

• Thermometer

• Barometer

Multiple Choice

What is the significance of the pattern of normal and reversed polarity in the rocks?

• It indicates the age of the rocks

• It shows the direction of ocean currents

• It records the history of Earth's magnetic field

• It measures the temperature of the magma

Multiple Choice

What occurs when more dense plates collide with less dense plates?

• The more dense plate floats on top

• The less dense plate subducts underneath

• The more dense plate subducts underneath, causing earthquakes and volcanoes

• Both plates remain stationary

Multiple Choice

What geological features can form at mid-ocean ridges?

• Deserts

• Volcanoes and earthquakes

• Forests

• Glaciers

Multiple Choice

What are the features associated with divergent plate boundaries?

• Mid-ocean ridges and rift valleys

• Earthquakes and San Andreas fault

• Subduction zones and mountain ranges

• Deep ocean trenches and island arcs

Multiple Choice

Which plate boundary is associated with the formation of the Himalayas?

• Divergent plate boundary

• Convergent plate boundary

• Transform plate boundary

• Oceanic ridge

Multiple Choice

What is the process called when materials rise and sink due to temperature changes?

• Conduction

• Radiation

• Convection currents

• Evaporation

Multiple Choice

What happens to the density of materials as they cool down?

• It decreases

• It increases

• It remains constant

• It fluctuates randomly

Multiple Choice

Which layer of the Earth is the hottest?

• Crust

• Mantle

• Outer core

• Inner core

Multiple Choice

What happens during slab pull?

• The lithosphere moves like a conveyor belt.

• The old crust is pulled down and away from the ridge.

• The more dense crust sinks beneath the less dense crust.

• New crust is formed at mid-ocean ridges.

Multiple Choice

Which force involves convection currents in the asthenosphere?

• Ridge Push

• Slab Pull

• Basal Drag

• Subduction