2-CGC1W1 Volcanoes and Plate Techtonics and Earthquakes

Volcano meaning?

A weak spot in the crust where molten material or magma comes to the surface

How do volcanoes form?

When magma rises to the Earth’s surface and erupts, building up layers of rock over time.

Plate boundaries?

The edges where Earth’s tectonic plates meet.

What is the difference between Magma and Lava?

Magma is underground molten rock. However, Lava is molten rock that has erupted onto the surface

Pyroclastic Flow

Fast moving mass of ash, hot gases and rock debris Travelling (upwards of 100’s of Km/h) down the side of a volcano as it erupts

Ash Cloud

Large cloud of fine ash material blown out that can be seen above the opening of the volcano when it erupts. Ash falls to the earth like snow

In what way do you think plate boundaries and events like volcanoes and earthquakes are related?

Plate boundaries are the primary source of the energy that drives volcanic eruptions and earthquakes

How do the processes of Plate Tectonics impact Canada?

Shaping its geography, causing geological hazards, and forming its major landforms

How does lava form?

When magma reaches the surface, this means when a plate is pushed under another (oceanic plates are heavier and will push up the lighter continental plates) at Convergent Plate Boundaries

Where do you find volcanoes?

Plate boundaries, Hawaiian Islands, occur in the interior of plates in areas called HOT SPOTS

The greatest number of volcanoes occur on the ocean floor along spreading ridges known as..

Divergent Boundaries

West Coast volcanoes are..

Sleeping/dead volcanoes

Ring of Fire is..

Most of the volcanoes in the world

Subduction Zone is..

One plate goes under another, forming volcanoes or trenches

Richter Scale

Tells us how strong the shaking of an earthquake is

Magnitude scale

The total energy released by an earthquake

Mountain ranges

Created when plates push against each other and fold the crust

The Eurasian plate moves..

Eastward

The North American plate moves..

Westward

How do Earthquakes occur?

When 2 plates rub or collide with each other, causing friction.

How do we use the magnitude scale?

By messing the strength of earthquakes