Building with solids |
properties of liquids |
Which solids would make good structures? Why? After observing and recording properties of several solid objects, second grade teams planned and built structures that met several requirements (for height, variety of materials used, etc.)
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How are liquids similar? How are they different from each other? Student pairs investigated what happens when mystery liquids are shaken, spun, tipped and rolled down a ramp. They recorded properties of their liquids before learning that the mystery liquids included hand soap, corn starch, oil, shampoo and colored water.
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porosity of earth materialsWhen working with earth materials, second graders quickly figure out that they possess very different properties. One of them is soils' porosity, or the space between their parts. Teams used a graduated cylinders and mathematics to carefully measure and record the amount of water that different earth materials can hold.
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Building with soilsSoils are useful to us in many ways, not only to grow plants but also as building materials. Students again practiced using a graduated cylinder to calculate how much water was needed to build a perfect sandcastle. Next, they worked with clay to create a small pot or sculpture, and compared the properties of sand and clay.
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