Molecules and Light: Greenhouse Effect Community
Questions, answers and tips from people who use the Molecules and Light: Greenhouse Effect. Shine microwave, infrared, visible or ultraviolet light on molecules and see which absorb it and what happens..
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From the tool guide: common questions about Molecules and Light: Greenhouse Effect
The items below are not posts by community members. They come from the written guide for this tool and are here to get a conversation started. Use “Ask a follow-up” to open a thread about any of them.
Why are CO₂ and CH₄ greenhouse gases?
They absorb infrared light, which traps heat in the atmosphere.
From the tool guide Ask a follow-upWhy do N₂ and O₂ not trap heat?
They do not absorb infrared, so it passes straight through.
From the tool guide Ask a follow-upKey ideas
- Different light energies make molecules move in different ways.
- Microwaves make polar molecules rotate.
- Infrared makes bonds vibrate.
- Ultraviolet can break molecules apart.
Things to try
- Compare CO₂ and N₂ in infrared.
- Shine ultraviolet on ozone.
- Try microwaves on water.
Where this is used
This explains global warming, the ozone layer and how a microwave oven heats food.
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