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What Is A rock

Published on Mar 29, 2017

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1.

WHAT IS A ROCK?

Essential questions answered
Photo by stebulus
2.

A rock is a solid, naturally occuring substance made up of minerals

Photo by Martin LaBar (going on hiatus)
3.

How are rocks and minerals different?

Photo by ...-Wink-...
4.

Minerals make up rocks - rocks DO NOT make up minerals

Photo by bertdennisonphotography
5.

What are the 3 types of rocks?

Photo by Darcy Moore
6.

Three types of rocks

  • Sedimentary
  • Igneous
  • Metamorphic
  • (SIM)
Photo by Joe Y Jiang
7.

How are rocks formed?

Let's find out....
Photo by Kuyan Redman
8.

Igneous Rocks

Beginning with the hot rock!
Photo by MrWoodnz
9.

Igneous Rocks Are...

  • formed from molten (melted) rock either on the earth's surface (lava) or underground (magma)
Photo by Rodolfo Vargas
10.

Two types of Igneous Rocks

Photo by John Spooner
11.

Intrusive

How and where are they formed?
Photo by Dead Air
12.

Where?

formed underground/inside earth
Photo by Paweł Czerwiński
13.

How?

from cooled MAGMA
Photo by MikeOliveri
14.

Characteristics

  • "Big", visible crystals
  • Coarse texture (grains are large)
Photo by jurvetson
15.

Example:
granite
gabbro

Photo by James St. John
16.

Extrusive

How and where are they formed?
Photo by Plant pests and diseases
17.

Where: on the surface of earth

Photo by foto Javier Castro
18.

How:

cooled LAVA (on surface of earth)
Photo by Plant pests and diseases
19.

Characteristics

small, tiny crystals create a fine texture
Photo by Caitlin Wynne
20.

Or...very porous or glassy

No visible evidence of crystals because of quick cooling
Photo by Hypocentre
21.

Examples

  • Basalt
  • Pumice
  • Obsidian
Photo by MrWoodnz
22.

Two Color Types

  • Felsic - light-colored rocks full of K, Al, Si and, Na.
  • Mafic - dark-colored rocks full of Ca, Fe and Mg
Photo by Ian D. Keating

Tammy Hershey