1. weather The condition of Earth's atmosphere including tempera-
ture, precipitation, wind and humidity over a short period
of time such as a day or a week.
2. climate Overall weather in an area over a long period of time.
3. greenhouse gas gas in the atmosphere that absorbs and emits heat
4. carbon dioxide The most abundant greenhouse gas. The main source of
CO2 which is burning fossil fuels. The driving force behind the
current climate change.
5. carbon a chemical element that makes up all life on Earth, has
different forms, and exists throughout Earth's systems
6. carbon emis- When we burn fossil fuels such as coal, oil, and natural
sions gas to generate electricity or power our cars, carbon is
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