| Science Investigations |
| SLOW CHANGES ON EARTH-WEATHERING We made rocks from Plaster of Paris with water balloons inside. Into the freezer they went. Many cracks were formed when the water froze and expanded. After several days on our desks, more chips were noted. |
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| The scratch test tells us how hard or soft the mineral is. |
| Mrs. Jacobson teaches us how to use the science tools and how geologists test minerals. |
| RAPID CHANGES ON EARTH An erupting volcano shows how quickly land can change. |
| We charted the properties of rocks. |
| Weathering Rocks with Sand |
| Water Erosion |