charisse-lennox
Uploaded by
7 SLIDES
377 VUES
70LIKES

Igneous rocks

DESCRIPTION

Igneous rocks. 7 th Grade Science. Igneous rocks. Igneous rocks are classified according to their texture, origin and composition. Igneous rocks. Orgin Igneous rocks may form on or beneath earths surface. Igneous rocks.

1 / 7

Télécharger la présentation

Igneous rocks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Igneous rocks 7th Grade Science

  2. Igneous rocks • Igneous rocks are classified according to their texture, origin and composition

  3. Igneous rocks • Orgin • Igneous rocks may form on or beneath earths surface

  4. Igneous rocks • Extrusive rock  formed from lava that erupted onto earths surface most common is basalt which is much of the ocean floor • Fast cooling and smaller crystals • Obsidian--no crystals • Basalt--micro crystals

  5. Igneous rocks • Intrusive Rock Igneous rock that formed when magma hardened below the earths surface (Granite) • Slow cooling and larger crystals • Granite

  6. Igneous rocks • Mineral Composition • Most of earth’s minerals contain silica made out of oxygen an silicon • The amount silica affects the type of igneous rock formed

  7. Igneous rocks • Uses • Building Materials • Statues (granite) • Bridges • Gravel (basalt) • Abrasives (pumice) • Tools (obsidian)

More Related