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Experiment 1a: which materials block the most UV light?
| Material | White cotton | Polyester | Aluminium foil | HDPE plastic |
|---|---|---|---|---|
| Result 1 (1-10) | 6.0 | 8.0 | 7.0 | 8.0 |
Experiment 1b: which transparent materials block the most UV light?
| Material | Polystyrene | Polyvinyl chloride | Red cellophane | Yellow cellophane | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Layer | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
| Result 1 | 8.0 | 7.0 | 7.0 | 8.0 | 7.0 | 7.0 | 2.0 | 1.0 | 1.0 | 3.0 | 2.0 | 1.0 |
Experiment 2: which liquid coatings block the most UV light?
| Material | Tap water | Vegetable oil | Black tea | Sun cream (SPF 8-10) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Coat | Thin | 10ml | 30ml | Thin | 10ml | 30ml | Thin | 10ml | 30ml | Thin | 10ml | 30ml |
| Result 1 | 8.0 | 8.0 | 8.0 | 8.0 | 6.0 | 5.0 | 4.0 | 3.0 | 1.0 | 5.0 | 4.0 | 2.0 |
Experiment 3: which particle size makes the best suspension?
| Particle size of sugar | Large grains | Small grains | Very small grains | Tiny grains (powder) |
|---|---|---|---|---|
| Result 1 | 00:11 | 00:29 | 01:36 | Stable |
Uczniowie spisali się na medal; dyplomy z Królewskiego Towarzystwa Chemicznego w Londynie otrzymają we wrześniu.
