Transcript document
Earth Materials Investigation 1 Mock Rocks Part 3 – Observing Crystals Science Jobs Manager – this person will make sure that all members are on task Reporter – this person will report the results of their groups work, you may need to take notes Materials getter – this person will get materials Materials collector – this person will return materials Investigation 1, Part 1 Review Rocks have many properties, including shape, size, color, and texture Geologists use rock properties to help identify different rocks Some dimensions of rocks can be measured and compared Investigation 1 – Part 2 Review The difference between rocks and minerals Rocks are made up of different ingredients, minerals of only one. How the minerals in a rock can be separated Some minerals can be separated and identified by breaking the rock apart. Some rock materials separate and settle when mixed with water. Some minerals dissolve when mixed with water. Investigation 1 – Part 2 Review A rock is an earth material made up of different ingredients called minerals. A mineral is an ingredient of rocks that cannot be broken down any further. We do not mean that it can’t be hit with a hammer and broken into smaller piece. We mean that no matter how many pieces you break it into, it is still the same material. Material Getters Carefully take the vials and hand lenses to your group. Do not shake them. Vial Observations Day 2 Our original challenge was to see if we could separate the ingredients in mock rocks by using water. Describe what you see in your vials. Record what you see in your Earth Materials Booklet Page 5 with a drawing and writing. Be sure to show the separate layers you see in your vials. What We Will Learn That some minerals can be separated from rocks by adding water and allowing them to settle. How to identify the materials that have dissolved in water. Question If there is something dissolved in the water, how would we be able to separate the water from the other material? Talk in your groups and reporters should be ready to share your ideas. What do you think would happen if we placed the liquid in this dish and let it sit for a few days? Vocabulary evaporation – liquid water turns into water vapor What We Will Do We will carefully pour only the liquid from the vial into the evaporation dish. We will only pour enough to just cover the bottom of the dish. Materials Material Getters will get 4 evaporation dishes 1 FOSS tray Procedure Put the label from your vial on the FOSS tray where the evaporation dish will sit. Place the evaporation dish in the labeled section. Carefully pour only enough water from your vial to just cover the bottom of the evaporation dish. Managers – take the vials to the rinse-out station. Rinse them out and set them in the corners of the FOSS tray. Procedure Materials Collectors will take the trays to the counter and carefully stack them. We will check the evaporation dishes after a few days. We are doing this to separate the water from any solids that may have dissolved in the water.