What is a rock?
A solid mass of one or more minerals that naturally occurs on Earth.
What are organic rocks?
Rocks made of material from living or once-living things (e.g.
What are the three main types of rocks?
Igneous
Sedimentary
Metamorphic
What is the Rock Cycle?
A continuous process where rocks change from one form to another.
How are igneous rocks formed?
When magma or lava cools and solidifies.
What are intrusive igneous rocks?
Formed underground (magma) — cool slowly
What are extrusive igneous rocks?
Formed on the surface (lava) — cool fast
How are sedimentary rocks formed?
From weathered rock pieces (sediments) that get compacted and cemented together.
What are the 5 steps in sedimentary rock formation?
Weathering → Erosion → Deposition → Compaction → Cementation.
What is a clastic sedimentary rock?
Made from fragments of other rocks.
What is a chemical or biochemical sedimentary rock?
Made from mineral deposits or organic matter (like shells).
Example of igneous rock in the Philippines?
Basalt from Mayon Volcano.
Example of sedimentary rock in the Philippines?
Limestone — found in Chocolate Hills
Example of metamorphic rock in the Philippines?
Marble — found in Romblon Province.
What happens when marble melts deep underground?
It becomes magma again — completing the rock cycle.
