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1. SOCIAL VIDEO
BY : ARNAV
ROLL . NO: 16
CLASS : VII

2. LEARNING OUTCOME
WE WOULD BE LEARNING
ABOUT DIFFERENT TYPES
OF ROCKS

3. AGENDA
We would be doing few
Q and A on different
types of rocks

4. RESOURCES REQUIRED
• A PEN • AND SOCIAL
NOTEBOOK FOR
WRITING DOWN Q&A

5. WIF

6. DIFFERENT TYPES OF ROCKS
There are three different types of rocks :
 Igneous rock
 Sedimentary rock
 Metamorphic rock

7. IGNEOUS ROCKS
• When the molten magma cools, it becomes solid. Rocks thus
formed are called igneous rocks or primary rocks
there are two types of igneous rocks and are:
• Intrusive rocks
• Extrusive rocks
• Intrusive rocks: sometimes the molten magma cools down deep in
side the earth’s crust they form intrusive rocks
• Extrusive rocks: when the molten magma comes out on the earth’s
crust it cools down to be known as extrusive rocks

8. IMAGES OF IGNEOUS ROCKS

9. SEDIMENTARY ROCKS
 Rocks roll down, crack and hit each other and are broken
down into smaller fragments these are known as sediments
 These loose sediments are compressed and hardened to
form layers of rocks . These types of rocks are called
sedimentary rocks
 Some examples of sedimentary rocks are shale, limestone ,
sandstone

10. Sedimentary rock

11. METAMORPHIC ROCKS
 Igneous and sedimentary rocks can change into metamorphic
rocks under great heat and pressure
 Some of the examples of metamorphic rocks are : schist,
gneiss , philtre

12. Images of metamorphic rocks

13. Q & A
1)WHAT ARE THE TWO TYPES OF IGNEOUS ROCKS
2)GIVE FEW EXAMPLES OF METAMORPHIC ROCKS
3)HOW ARE SEDIMENTARY ROCKS FORMED
4)WHICH TYPE OF ROCKS DO CHANGE OVER TIME TO
METAMORPHIC ROCKS
Answers

14. Answers
1 the two types of rocks are igneous rocks are extrusive rocks
and intrusive rocks
2 marble, schist , hornfels are few of the examples of
metamorphic rocks
3 when the sediments are compressed with many more
sediments to form the sedimentary rocks
4 sedimentary and igneous rocks change into metamorphic
rocks over time
Q & A