Earth Materials Investigation 1

1. Earth Materials Investigation 1 Mock Rocks Part 3 – Observing Crystals

2. 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

3. 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

4. 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.

5. 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.

6. Material Getters • Carefully take the vials and hand lenses to your group. Do not shake them.

7. 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.

8. 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.

9. 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?

10. Vocabulary • evaporation – liquid water turns into water vapor

11. 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.

12. Materials • Material Getters will get • 4 evaporation dishes • 1 FOSS tray

13. 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.

14. 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.