FeaturesJanuary 19, 2017
Hooked on Science: Straw worm
n Straw with paper wrapper n Water n STEP 1: Using your fingers, completely scrunch the wrapper to the end of the straw. n STEP 2: Remove the scrunched-up wrapper and place it on a flat surface. Describe the wrapper by its observable properties. Using a ruler, measure the length of the wrapper. Record the length of the wrapper on a piece of paper...
Materials
- Straw with paper wrapper
- Water
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Instructions
- STEP 1: Using your fingers, completely scrunch the wrapper to the end of the straw.
- STEP 2: Remove the scrunched-up wrapper and place it on a flat surface. Describe the wrapper by its observable properties. Using a ruler, measure the length of the wrapper. Record the length of the wrapper on a piece of paper.
- STEP 3: Using the straw and your finger, slowly add a few drops of water to the wrapper and observe. Describe the wrapper by its observable properties. Using a ruler, measure the length of the wrapper. Record the length of the wrapper on a piece of paper. Using these measurements, identify the wrapper based on its properties.
Explanation
Each time you added a drop of water, the paper absorbed the water, causing the scrunched-up wrapper to look as if it were moving on the flat surface.
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