1. Rocks: Mineral Mixtures

2. What exactly is rock?
A solid mixture of minerals, shells, bones, leaves, stems and other remains of living things.

3. Classify Rocks
The three main types of rocks are: igneous, sedimentary, and metamorphic
The way the rock forms or is made determines the type of rock that it is. .

4. Igneous Rocks
Igneous rocks were originally hot, fluid magma within the Earth.
Igneous get their name from the Latin word, ignis, which means “fire”.

5. Igneous rocks are classified according where they formed.
Extrusive rock is rock that formed from lava that erupted onto the Earth’s surface.
Intrusive rock is rocked that formed when magma hardened beneath the Earth’s surface.

6. Igneous Rocks

7. Sedimentary Rock
Most sedimentary rocks are formed from particles that have been carried along and deposited by wind and water and then pressed together to form sedimentary rocks.

8. Compaction Cementation
Year after year more sediment falls on top and are pressed to form more layers. The weight of each layer continues to compact the layers together.
Cementation
the process in which the dissolved minerals crystallize and glue particles of sediment together

9. Sedimentary Rocks
Shale
Conglomerate
Sandstone

10. Metamorphic Rocks
Metamorphic rocks are new rocks that are formed when tremendous heat and great pressure change existing rocks.
These new rocks will have chemical and physical properties that are very different from the original rocks.

11. Metamorphic Rocks
Schist
Gneiss

12. Rock Cycle
The continuous changing of rocks from one kind to another over long periods of time is called the rock cycle.
The rock cycle has no definite sequence. It can follow many different pathways.

14. The Value of Rock Rock is an important natural resource.
Used by early humans to make tools such as hammers, spears, knives, and scrapers.
Used for centuries to make buildings, roads, and monuments.
Certain types of rocks have helped build ancient and modern civilizations.
Rock study has helped scientists to discover the history of life on Earth.

15. Fossils Fossils are found in Sedimentary rock
They help provide information of life forms that lived thousands of years ago.

16. Fossils provide information about life and conditions in the past.

17. Fossils of Sea Creatures
Oceans once covered the area
What part of the ocean

18. Fossils of Plants
Plant fossils can tell us about the ancient environment

19. Animal Fossils Animal fossils can tell us About past environments
What the animal ate
How they lived