1. Changes in the Earth’s Surface

2. How Do Volcanoes and Earthquakes Change the Earth?
Lesson 1 – Part A
How Do Volcanoes and Earthquakes Change the Earth?

3. A volcano is…
A special type of mountain with an opening, or vent, as its top.

4. Magma is…
Hot, melted rock that is deep inside the earth.

5. To erupt means to BURST OUT!

6. Lava is…
Magma that erupts out onto the earth’s surface

7. The fours steps of a volcanic eruption are:
Do you want to learn more?
Magma rises from deep inside the earth. Gathers in the magma chamber.
Magma pushes through cracks in the earth.
Lava erupts from the volcano.
Lava builds up outside the volcano. It cools and hardens. A mountain forms.

8. How Do Volcanoes and Earthquakes Change the Earth?
Lesson 1 – Part B
How Do Volcanoes and Earthquakes Change the Earth?

9. tallest mountain on Earth
The tallest volcano on Earth is Mauna Kea in Hawaii. The summit (or top) of Mauna Kea is 4,205 meters above sea level, but its true height is much larger. When measured from the sea floor, it is more than 9,000 meters tall, making it the tallest mountain on earth
Volcanoes can change the earth’s surface quickly by growing taller and taller.

10. Islands form from volcanoes by…by…
Reaching the surface of the water

11. An earthquake is…
a shaking or sliding of parts of the earth's surface.

12. Earthquakes change the earth by…
causing the land to move up, down, or sideways. .
San Francisco
Earthquake 1906

13. Earthquakes often happen during or before…
Volcanic eruption seen from space!
A VOLCANO ERUPTS!!

14. Scientists study earthquakes and volcanoes by...
using several different instruments to pick up very slight movements under the earth
A seismograph machine
measures earthquakes

15. Some ways to stay safe during an earthquake are...
1. Duck, Cover, and Hold
2. stay away from windows, furniture, trees, signs, and electric wires.