- Ice changes when UV light from the sun shines.
- Scientists use computer simulations to watch changes.
- They study how ice absorbs and emits light.
- Some ice has small defects inside.
- Defects make the ice absorb different colours.
- UV light can break water into pieces.
- Electrons may move or become trapped.
- Researchers want to test predictions with experiments.
- Results may affect greenhouse gas predictions.
Difficult words
- simulation — a computer model that copies realitysimulations
- absorb — take in light or energyabsorbs
- emit — give out light or energyemits
- defect — a small problem or hole inside materialdefects
- electron — a very small particle with negative chargeElectrons
- greenhouse gas — a gas that warms the Earth's atmosphere
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Have you seen ice with cracks or holes?
- Would you like to watch a computer simulation of ice?
- Are you worried about greenhouse gases?
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