The document discusses plate tectonics and how it relates to volcanoes and earthquakes. It explains that volcanoes occur when plates move apart and spew hot lava, while earthquakes happen when plates rub together in opposite directions. Plate tectonics was proposed in the 1960s and suggests that Earth's outer layer is made of plates that float on the asthenosphere, causing volcanic eruptions and earthquakes that can damage homes and infrastructure.
Grade 8 Integrated Science Chapter 15 Lesson 2 on volcanoes. This lesson goes into detail about volcanoes, plate boundaries, lava chemistry, eruption types, and volcano types. The purpose of this lesson is for students to understand where and why volcanoes form and what factors cause differing volcanic features.
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2. Volcanoes
• This happens when two plates move apart.
• A Volcano is a mountain that shoots out lava.
• There is types of volcanoes depending on how
much pressure is built up and there shapes
and sizes.
• Volcanoes are dangerous because the spurt
out hot lava and destroys lives an homes.
• It affects many miles around it and destroys
almost anything.
3. Earthquakes
• This happens when two plates rub against each other going
opposite ways.
• An earthquake is when the earth shakes and destroys things.
• It is measured in the Richter magnitude scale.
• It affects lots of areas but as you get closer to the plates it gets
worse.
• An earthquake is dangerous because it can nock over things
and cause them to fall sometimes on people and kill people.
• There is different types of earth quakes depending on there
force.
• Plate tectonics make earthquakes because if there wasn't
plates there would not be earthquakes.
4. Plate tectonics
• Bob Ballard came up with plate tectonics in
1960s.
• Plate tectonics is a theory that earths outer
layer is made of plates.
• The pieces of outer layer float on top of the
asthenosheere.
• It affects all over the planet.
• Can hurt people by the movement.
