4th Grade Science By: Lindsey Scott

Learning Objectives

• As a result from this power point, the students will know about volcanoes and other properties volcanoes contain.

• The quiz will be a review on the subject the students just learned and will be a way for me, as the teacher, to see if they understood the lesson.

Volcanoes

What is in Volcanoes?• Magma - molten rock below the

Earth’s surface.• Lava – magma on the Earth’s surface.

Different Types of Volcanoes

1.Shield Volcanoes2.Composite Volcanoes3.Cinder Cone Volcanoes

Shield Volcano

• Made of lava • Has a small and gentle slope• Mostly around oceans

Example: Volcanoes near the Islands of Hawaii

Composite Volcanoes

• Small in size with a steep slope• Short life span• Made of pyroclastic flow– Pyroclastic flow – fast moving current of hot gas

and rock.

Mt. St. Helens

• Mt. St. Helens is a Composite Volcano• Erupted in the state of Washington in 1980• It was very destructive and deadly• The eruption created an earthquake, landslide, and

explosion.– Earthquake – shaking of the ground caused by the release

of energy stored in the rocks beneath the Earth’s surface.– Landslide – when gravity pulls the ground and creates

ground movement (including rocks, soil, etc.) along a slope or mountain side.

Mt. St. Helens

Cinder Cone Volcanoes

• Made of both Lava and Pyroclastic flow• Semi-Steep• Long life spans (about 100s to 1,000s of years

without activity)

Quiz

Question 1

How is magma different than lava?

a. Lava is below the Earth’s surfaceb. Magma is below the Earth’s surfacec. There is no difference

Next Question

Correct Answer: b. Magma is below the Earth’s surface

Question 2

Which volcano is this?

a. Shield Volcanob. Composite Volcanoc. Cinder Cone Volcano

Correct Answer: c. Cinder Cone Volcano

Question 3

Which Volcano is Mt. St. Helens?

a. Shield Volcanob. Composite Volcanoc. Cinder Cone Volcano

Correct Answer: b. Composite Volcano

Great Job!!Have a wonderful rest of the day! I will see all of you bright and early tomorrow morning!

Source Cited

Marshak, Stephen. Essentials of Geology. W. W. Norton & Company, Incorporated, February 27, 2009. Print

Wikipedia. Mount St. Helens. 2013. http://en.wikipedia.org/wiki/Mount_St._Helens