6. Objectives
By the end of the lesson, the students should be able to;
1. Identify the three classifications of rocks;
2. Enumerate examples for each classification;
3. Create a diagram of the rock cycle.
11. Igneous rocks
/Ignis/ -Latin word for fire.
• Forms when hot, molten rock crystallizes and solidifies.
• The melt originates deep within the Earth near active plate
boundaries or hot spots, then rises toward the surface.
Igneous rocks are divided into two groups, intrusive or
extrusive, depending upon where the molten rock solidifies.
12. Igneous rocks
INTRUSIVE Igneous rocks EXTRUSIVE Igneous rocks
• Forms when magma is
trapped deep inside the
Earth.
• Takes time to cool down,
resulting to larger crystals.
• Intrusive rocks have a coarse
grained texture.
• Produced when magma exits
and cools above (or very
near) the Earth's surface.
• They cool down too quickly
that it yields small crystals.
• these rocks have a very fine-
grained or even glassy
texture
16. Sedimentry rocks
/Sediments/
-is a naturally occurring material that is broken down by
processes of weathering and erosion, and is subsequently
transported by the action of wind, water, or ice or by the
force of gravity acting on the particles.
/Sedimentation/
-is the collective name for processes that cause these particles
to settle in place.
17. Sedimentary rocks are formed from pre-existing rocks
or pieces of once-living organisms. They form from
deposits that accumulate on the Earth's surface.
Many of the picturesque views of the desert southwest
show mesas and arches made of layered sedimentary
rock
Sedimentry rocks
22. Definition of terms
/Lithificaiton/
-the process that loose and underconsolidated
Sediment particles transform into hard and solid rocks.
/Cementation/
-A sedimentary rock-forming process in which sediment
grains are held together by natural cements that are
produced when water moves through rock and soil”
23. Definition of terms
/Compaction/
-The process that forms sedimentary rocks when layers
of sediments are compressed by the weight of the
layers above them.
/Weathering/
-Weathering is the deterioration of rocks, soils and
minerals as well as wood and artificial materials
through contact with water, atmospheric gases, and
biological organisms.
43. 7-10. Create a diagram of the rock scycle.
4-6. Beside the answers from 1-3, give an example for each.
Evaluation
1-3. What are the three classifications of rocks?
44. 7-10. Create a diagram of the rock scycle.
4-6. Beside the answers from 1-3, give an example for each.
Evaluation
1-3. What are the three classifications of rocks?
45.
46. 7-10. Create a diagram of the rock scycle.
4-6. Beside the answers from 1-3, give an example for each.
Evaluation
1-3. What are the three classifications of rocks?
