FeaturesOctober 5, 2017
Hooked on Science: Leakproof bag
n Several round, sharp pencils n Water n Re-sealable storage bag n STEP 1: Fill the bag with water. Describe the bag by its observable properties. n STEP 2: Gently push the pencils through the bag. What happens? Describe how pushing pencils can be used as a model to describe how matter is made up of particles too small to be seen...
Materials
- Several round, sharp pencils
- Water
- Re-sealable storage bag
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Instructions
- STEP 1: Fill the bag with water. Describe the bag by its observable properties.
- STEP 2: Gently push the pencils through the bag. What happens? Describe how pushing pencils can be used as a model to describe how matter is made up of particles too small to be seen.
Explanation
The bag is made of polymers. Polymers are long, repeating chains of molecules, and when the sharp pencil is pushed through the bag, these chains of molecules seal up around the pencil, preventing the water from leaking out of the bag.
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