Plate Tectonics quiz

Plates of the _?_ are composed of oceanic crust, continental crust, and rigid upper mantle.

1. Lithosphere

The formation and alignment of new iron bearing minerals reflect the fact that Earth's _?_ field has reversed itself several times in the past.

1. Magnetic

As the Earth's plate pull apart at some boundaries, they collide at others forming _?_, _?_ and _?_.

1. Mountains 2.Volcanoes 3.Ocean Basins

The name _?_ means "all land".

1. Pangaea

The theory that describes the earth's crust and upper mantle is being divided into sections is called __?__

1. Plate Tectonics

Earth's _?_ move around on a special layer of the mantle.

1. Plates

The youngest material found on the ocean floor is found at mid-ocean _?_.

1. Ridges

Scientists aboard the glomar challenger aided the theory of seafloor spreading by providing samples of _?_ from different _?_.

1. Rocks 2. Locations

The theory of _?_ was shown to be correct by age evidence and magnetic clues.

1. Seafloor Spreading

Oceanic plates are pushed down into the upper mantle in __?__.

1. Subduction Zones

Ocean Floor rocks are _?_ than continental rocks.

1.Older

How does new material form on ocean floor and at mid-ocean ridges?

Ocean ridges are made from divergent boundaries so when they pull apart magma escapes through the open space left.

True or False? Continental drift occurs because of seafloor spreading.

True.

True or False? The Idea that continents have moved slowly to their current locations is called continental drift.

True.

True or False? A lack of explanation for continental drift prevented many scientists from believing a single supercontinent called Pangaea existed.

True.

True or False? The cycle of heating, rising, cooling and sinking is called convection current.

True.

True or False? The oldest material on the ocean floor is about 180 million years old.

True.

True or False?Studying the ocean floor, scientists found rocks showering magnetic reversal.

True.

The Earth's thick, plastic-like layer is ___?___.

1. Asthenosphere

The main lines of evidence for _?_ _?_ are fossil, rock and climate clues and the theory of seafloor spreading.

1. Continental 2. Drift

_?_ _?_ occurring in the mantle, are thought to be force behind plate tectonics.

1. Convection 2. Currents

The places between the colliding plates are called _?_ boundaries.

1. Convergent

Plates move apart in _?_boundaries.

1. Divergent

Where plates slide past one another, _?_ occur.

1. Earthquakes

The __?__ Mountains are forming where indo-Australian plate crashes into the Eurasian plate.

1. Himalayan

Seafloor spreading occurs because _?_, _?_ dense material below the Earth's _?_ is forced upward toward the surface.

1. Hot 2. Less 3. Crust

What did Wegener observe that lead him to the continental drift theory?

Alfred Wegener first thought of this idea by noticing that the different large landmasses of the Earth almost fit together like a jigsaw puzzle.

What is the difference between convergent and divergent plate boundaries?

At a convergent plate boundary, two tectonic plates are moving toward each other; at a divergent plate boundary, two tectonic plates are moving away from each other.

True or False? The presence of the same fossils and minerals on several continents supports the idea of continental drift.

False. Fossils and ROCKS

True or False? The results of plate movement can be seen at divergent boundaries.

False. They can be seen at plate boundaries.

How are different mountain ranges alike?

They all form the same by two plates colliding. (Convergent boundaries form mountains).

Where does warmer material move in a convection current?

Upward