| A | B |
|---|
| carbon cycle | Shows the movement of carbon on this planet |
| Respiration | Process producing CO2 and H2O from glucose and O2 |
| Photosynthesis | Process producing glucose and O2 from CO2 and H2O |
| Global warming | The increase in temperature caused by increase in amount of CO2 |
| Solar energy | Energy obtained directly from the sun |
| Wind power | Electrical energy produced from windmills |
| Methane | Gaseous hydrocarbon fossil fuel |
| Renewable energy sources | Energy sources that will not run out |
| HEP | Electrical energy produced from falling water |
| CO2 | main cause of global warming |
| Greenhouse Effect | This effect causes global warming |
