# 3 Types of Rocks and the Rock Cycle  Igneous, Sedimentary, Metamorphic   FreeSchool 1

**Channel:** Tsang Sau Hing Debbi
**Source:** https://www.youtube.com/watch?v=6qaG3MqI-4o
**Transcript page:** https://www.withtranscript.ai/video/6qaG3MqI-4o

## Chapters

- 0:05 — Overview of Rocks and Igneous
- 1:21 — Sedimentary Rocks and Fossils
- 2:22 — Metamorphic Rocks and Changes

## Transcript

**[0:05]:** please rocks are everywhere they are large and small heavy or light porous or dense but rocks in some shape or form can be found all over the planet different types of rocks are formed in different ways there are three main types of rock ous sedimentary and metamorphic Ignus is a word that means fiery ous rock is formed when magma or lava cools sometimes magma cools slowly underneath the Earth surface this forms intrusive ous rock like Granite other times lava cools when it comes to the surface in a volcanic eruption this forms extrusive ous rock some examples of extrusive ous rock are tough obsidian and pmus ous rocks make up about 95% of the Earth's crust

**[1:21]:** the next type of rock is sedimentary rock sediment is small particles of sand mud and organic material that settle to the bottom of water or land areas often lakes or oceans sedimentary rocks are formed when sediment accumulates over time in deposits that form layers these layers become squeezed and compressed over time until they consolidate into a rock sedimentary rocks are the types of rocks in which fossils may be found since the process of forming sedimentary rocks can preserve plant and animal remains that are deposited into the sediment layers some examples of sedimentary rock are limestone Shale and Sandstone the third type of rock is metamorphic rock the word metamorph means to change form and metamorphic

**[2:22]:** rock is rock that has been changed by extreme heat and pressure sedimentary rock ous rock or even other metamorphic rocks can be changed by heat and pressure into new kinds of rock metamorphic rocks can be formed by being deep under the Earth where pressure and temperatures are high or when rock near the surface is heated up by the movement of tectonic plates or magma different types of rocks become different types of metamorphic rock when exposed to heat and pressure for example shale becomes slate Sandstone becomes quartzite and Limestone becomes marble