Download Name: Date: Subject: Igneous Rock Objectives Objective 1

Name:
Date:
Subject:
Igneous Rock
Objectives
Objective 1: ASWBAT describe how igneous rocks are formed.
Objective 2: ASWBAT describe what makes igneous rocks different from others.
Objective 3: ASWBAT describe what intrusive and extrusive igneous rocks are.
On a scale of 1 – 3 how well you can do on this objective now.
(1 – Not at all
2 – I know it a little bit
3 – I know it very well)
Highlight your choice.
Objective: 1
Objective: 2
Objective: 3
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Key Vocabulary Words
On a scale of 1 – 3 how well you know the vocabulary words below.
(1 – Not at all 2 – I know it a little bit 3– I know it very well)
Igneous Rock
Intrusive Igneous Rock
Extrusive Igneous Rock
Minerals
Magma
Lava
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Pre-quiz
Do your best to answer the following questions.
1. What is the rock cycle?
Answer:
2. What are the three main types of rock?
Answer:
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Igneous Rock
Everything has a melting point, even rocks. When rocks are heated to their melting point
they become liquid. Scientists call liquid rock, lava or magma. Magma is liquid rock that is
under the Earth’s surface and lava is liquid rock that is on the Earth’s surface. Regardless
of where the liquid rock is, when it cools and solidifies it becomes igneous rock. Igneous
rock is rock formed when molten rock cools and solidifies.
Magma or Lava
Igneous Rock
Cooling
1. How are igneous rocks formed?
Answer:
Video: Lava Sculptures: https://www.youtube.com/watch?v=qH0Ekmx7Aek
What makes igneous rocks different?
Just like all rocks, igneous rocks are made of a mixture of minerals. The minerals in the
magma or lava that formed the igneous rock determine the mixture of minerals that are in
it. All igneous rock formations are a unique mix of minerals. These unique mixes of
minerals make them different. They can be different colors, textures and density.
Different Type of Igneous Rocks
1. Why are different igneous rock formations different from each other?
Answer:
Types of Igneous Rock Formations
There are two types of igneous rock formations, intrusive and extrusive. The difference
between the two has to do with where they are formed.
Intrusive Igneous Rock
As heat from the Earth’s core rises through the crust it melts its way through the rocks
above. Sometimes it makes it to the surface forming a volcano. Most of the time however it
cools before it reaches the surface. When this happens scientists call the igneous rock that
is formed intrusive igneous rock. Intrusive igneous rock is formed by magma that cools
underground.
Extrusive Igneous Rock
When the molten rock reaches the surface it becomes lava. When lava cools and solidifies
we call it extrusive igneous rock. Extrusive igneous rock is formed from lava that cooled
on the Earth’s surface.
Extrusive Igneous Rock
Intrusive Igneous Rock
Sedimentary
Rock
Magma
Video Link: Igneous Rock
http://www.schooltube.com/video/1db4b49ffe290cd8fd16/
1. What are the two main types of igneous rock? Where are they formed?
Type
Where are they formed?
Action! – Let’s look at some igneous rocks. (Mineral Kit: 8 – 14)
Quiz
1. How are igneous rocks formed?
Answer:
2. Why are different igneous rock formations different from each other?
Answer:
3. What are the two main types of igneous rock? Where are they formed?
Type
Where are they formed?