All About Rocks!

We have been learning about rocks the last few weeks. We have categorized and identified rocks based on the types and attributes of each rock. We have learned about the three types of rocks: Igneous, Metamorphic, and Sedimentary; we also learned about the characteristics of these types of rocks.We used photos and actual samples of rocks to determine the attributes and type of each. We also started learning about minerals and we will continue to learn about them this week and compare/contrast minerals and rocks.

What we've learned about rocks so far:

• Sedimentary rocks have layers that are pressed by heat and pressure over time. 
• Some rocks are formed by lava. Some rocks have crystals. Rocks are formed by heat, pressure and time. It takes about 1,000 years to form some rocks. Some rocks are fossils of animals and plants.
• There are two kinds of Igneous rocks: intrusive and extrusive. 
• There are three different kinds of rocks. They are Igneous, Sedimentary and Metamorphic. Igneous rocks are made in and around volcanoes. The ones made inside volcanoes are called intrusive. On the contrary, there are also Igneous rocks made outside volcanoes, which are called extrusive. Sedimentary rocks are made from different fossils, rocks, and other minerals. 
• There are three types of rocks: Sedimentary rocks usually have shells and fossils they are made of sediments. Igneous rocks are made by volcanoes. There are two types of Igneous rocks, intrusive and extrusive. You can see particles in intrusive but you can't in extrusive igneous rocks.