QUIZ 1 - INTRODUCTION TO PLATE TECTONICS

Which of these is a TRUE statement about lithospheric plates?

• Composed of minor and major blocks called the crust.

• Include the crust and upper mantle.

• The thickest and most flexible layer of the Earth that can be broken because of tension.

• All of the statements are true.

A tectonic plate consists of _________.

• The oceanic and continental crust only.

• The continents only.

• The asthenosphere only

• The crust and the uppermost mantle

Which statement is TRUE about Continental Drift Theory?

• Based on the distribution of rock types, fossils, and structures of continents.

• Accepted by most geologists during Wegener’s time.

• Based on oceanic fossils and basalt

• Suggested that the original landforms were large islands.

The theory of _________ states that as the ocean floors move, it carries the continents too.

• Continental Drift Theory

• Plate Tectonic Theory

• Seafloor Spreading Theory

• Pangaea Proxima

Which is the thinnest layer of the Earth?

• Mantle

• Inner core

• Outer core

• Crust

It is a jelly-like structure located on the uppermost part of the mantle where plates float.

• Asthenosphere

• Lithosphere

• Outer core

• Mantle

According to the Theory of Harry Hess, continents move because of _________

• the molten material within the Earth.

• the shaking of grounds.

• the climate change that continuously happening on

  Earth.

• the unbalanced force exerted in the innermost layer of the Earth.

Why do tectonic plates move?

• Due to active volcanism and earthquakes.

• Due to current convection in the mantle.

• Due to Earth’s gravitational force.

• Due to Earth’s rotation.

Which of the following elements are present in Earth's core?

• Nickel and Zinc

• Iron and Nickel

• Iron and Nitrogen

• Nickel and Iodine

1.   How will you differentiate Mohorovicic discontinuity and Gutenberg discontinuity?

• Mohorovicic discontinuity marks the boundary between the upper mantle and the crust while the Gutenberg discontinuity marks the boundary between the lower mantle and outer core.

• The Mohorovicic discontinuity is located about 2900 km below the Earth surface whereas the Gutenberg discontinuity is 8 km below the ocean floor and 30 to 50 km beneath typical continents.

• The Gutenberg discontinuity separates the liquid outer core and the solid inner core of the earth while Mohorovicic discontinuity marks the boundary between the lower mantle and the outer core.

• Mohorovicic and Gutenberg discontinuities are the only boundaries of the Earth's layers.