Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Earth Unit
Document related concepts
Transcript
Earth Unit Lesson 13 – Crystals and Minerals Objective Describe the characteristics of different rocks. Describe rocks in terms of their parts (e.g. crystals, grains, cement). Sort rocks based upon color, hardness, texture, layering, particle size and type Vocabulary crystals: are a special kind of solid material where the molecules fit together in a repeating pattern mineral: made are made of one thing Minerals and Crystals What are minerals? Minerals are found throughout the Earth’s crust. The tiniest bits of matter in minerals fit together in a special pattern. This pattern is called a crystal. Have you ever eaten a crystal? I bet you have. You probably ate some today for lunch. Can you guess what it was? SALT! Salt is a crystal that you can eat. Minerals and Crystals Crystals are all around us. You might wear a crystal (such as a diamond or a ruby) on your finger, or sprinkle crystals (such as salt or sugar) on your food. In the winter you can even catch a frozen water crystal, called snowflakes, on your tongue! Minerals and Crystals Crystals start out as molten liquid deep in the mantle of the earth. This magma rises to the crust and slowly cools there. As the liquid gradually becomes solid, it forms geometric patterns. Go to the link below to see how crystals form. Igneous Rock Crystallization Animations http://www.classzone.com/books/earth_science/terc/cont ent/investigations/es0603/es0603page05.cfm Minerals and Crystals Each kind of mineral has a specially shaped crystal. Diamond crystals, for example have a different shape from ruby crystals. Minerals and Crystals One way geologists can tell what minerals are in a rock is by looking at the shape of the crystals in the rock. Crystals are made of tiny bits of matter that all fit together to shapes. Igneous Rock Crystallization Animations http://www.classzone.com/books/earth_science/terc/co ntent/investigations/es0603/es0603page05.cfm Make your own Crystal Cube Crystals come in may shapes and sizes. Today we will be making a salt crystal. In each box write a fact you have learned about crystals. Then follow the directions and construct a salt crystal cube. Make your Own Crystal (Optional Activity )
