Transcript Types of rocks - mls

Types of Rocks
1. Igneous Rocks
2. Sedimentary Rocks
3. Metamorphic Rocks
Igneous Rocks
• They are rocks formed by solidification of the
magma underneath the earth’s crust or lava
on the earth’s surface
• Examples :
a. Granite
b. Basalt
Sedimentary Rocks
• They are rocks formed from the fragments and
decomposed products of other rocks
• Examples:
a. Sandstone
b. limestone
Metamorphic Rocks
• They are rocks originated from exposing the
old rocks to heat and pressure
• Example: Marble
Rock Cycle
• It is the change of one type of rock to another
Earth
It is the third planet from the sun
Planet Earth is suitable for life
Due to :
1. Presence of hydrosphere
2. The presence of atmosphere
3. Its temperature is suitable
4. Its atmospheric pressure and its gravitational
force
Earth’s Layers
It consists of three layers
1. Crust
2. Mantle
3. Core
a. Outer Core
b. Inner Core
Earth’s Layers
•
•
•
•
Crust’s thickness: 8-50 Km.
Mantle Thickness: 2885 Km.
Outer Core: 2270 Km.
Inner Core: 1216 Km.