Intrusive and Extrusive Igneous Rocks Eric Angat Environmental

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Intrusive and Extrusive Igneous Rocks Eric Angat Environmental Science

Intrusive and Extrusive Igneous Rocks Eric Angat Environmental Science

1. What are the building blocks of rocks? 2. How are rocks classified? http:

1. What are the building blocks of rocks? 2. How are rocks classified? http: //www. youtube. com/watch? v=a. Cn. AF 1 Opt 8 M

3. What are the parts of a volcano? pyroclastic cloud and ash Crater Lava

3. What are the parts of a volcano? pyroclastic cloud and ash Crater Lava vent sill Magma conduit Magma chamber

4. What are the two types of igneous rocks? 1. Extrusive rock formed on

4. What are the two types of igneous rocks? 1. Extrusive rock formed on the surface. 2. Intrusive rock formed underground or plutons.

5. What are plutons or intrusive igneous rocks? A pluton is magma that moves

5. What are plutons or intrusive igneous rocks? A pluton is magma that moves upward and cuts across pre-existing layers of rock. Plutons include batholiths, dikes, sills, and Laccoliths.

6. Describe the different shapes of plutons or intrusive igneous rocks. Lacolliths dome shaped

6. Describe the different shapes of plutons or intrusive igneous rocks. Lacolliths dome shaped Sill flat shape Dike Batholiths- large irregular shaped tabular shape

7. Describe basalt rock. Basalt rock- Igneous is an extrusive rock. Is formed from

7. Describe basalt rock. Basalt rock- Igneous is an extrusive rock. Is formed from rapidly cooled lava. It is fine grained which means it has very small crystals.

8. Describe obsidian rock. is an extrusive rock. Obsidian rock- Igneous Lava comes in

8. Describe obsidian rock. is an extrusive rock. Obsidian rock- Igneous Lava comes in contact with water resulting to rapid cooling. glassy texture in the resulting rock. Iron and magnesium give the obsidian a dark green to black color.

9. Describe vesicular igneous rock. Pumice Vesicular rock- Igneous Pumice is a highly vesicular

9. Describe vesicular igneous rock. Pumice Vesicular rock- Igneous Pumice is a highly vesicular pyroclastic igneous rock Pumice - formed from quickly cooled lava. Usually lava ejected into the air by volcanic eruption.

10. Describe granite rock. Granite rock- Igneous is an intrusive rock. Intrusions (plutons) are

10. Describe granite rock. Granite rock- Igneous is an intrusive rock. Intrusions (plutons) are bodies of igneous rock that result from crystallization of magma deep underground. Slow cooling at depth in the Earth produces larger crystals.

11. Why do intrusive rocks have bigger crystals than extrusive rocks? Basalt rock- extrusive

11. Why do intrusive rocks have bigger crystals than extrusive rocks? Basalt rock- extrusive Igneous Granite rock- intrusive igneous Crystals are more evident in intrusive rocks! Crystals are bigger in intrusive rocks because magma cools slowly. This gives time for the crystals to grow larger.

12. Which of the following could increase the rate of chemical weathering of a

12. Which of the following could increase the rate of chemical weathering of a rock? a. moving it to a location with few plants and animals b. moving it to a drier climate c. increasing its total surface area d. moving it to a colder climate