← Minerals, Rocks & Fossils Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Properties Scientists can tell a mineral by its ___________. Hardness, color and shape Some properties of minerals are ___________, ____________ & ____________. Salt A type of mineral that we eat. Diamonds A type of mineral that we wear (Jewelry). Graphite A type of mineral that we use to write. Iron Used in things like ships, cars and buildings Wood & Graphite Pencils are made out of _________ & ___________. Rocks The Earth is made mostly of ____________. Crust, Mantle & Core The 3 layers of the Earth are: Crust The outside layer of the Earth made of solid rock. Mantle The middle layer of the Earth made of soft rock. Core The center of the Earth that is made of solid and liquid iron. How they form Rocks are grouped by ________ _________ __________. Igneous Rocks Formed from melted rock that has cooled and hardened. Sedimentary Rock Formed when wind and weather break down rocks and the particles pile up in layers. They press together to become solid rock. Metamorphic Rock Rock that was once igneous or sedimentary, but has changed from heat and pressure. True True/False: All rocks can be changed from melting, heat and pressure, and the effects of wind and water. True True/False: Fossils can show the shape of an animal that lived long ago. Because what's left of a plant or animal is trapped in the sediments that form the layers of the rock. Why do sedimentary rocks usually have more fossils? A mold The shape of a plant or animal left in sediments when the rock formed. A cast Has the exact shape of the animal that made the mold. It is formed when mud or minerals fill a mold. How is a cast formed? By looking at the shape of their teeth How can scientists tell what kind of food dinosaurs ate?