Taken in (during photosynthesis):
* Carbon Dioxide (CO2): Plants use carbon dioxide as a building block to create sugars for energy. This is the primary gas they take in.
* Water (H2O): Plants absorb water through their roots, and they use it for photosynthesis and other processes.
Given off (during photosynthesis):
* Oxygen (O2): As a byproduct of photosynthesis, plants release oxygen into the atmosphere. This is why we can breathe!
Given off (during respiration):
* Carbon Dioxide (CO2): Plants also breathe, just like animals. During respiration, they take in oxygen and release carbon dioxide. This happens constantly, but at a lower rate than photosynthesis during daylight hours.
Summary:
* Daytime: Plants take in CO2 and water, and release oxygen.
* Nighttime: Plants take in oxygen and release CO2.
This is a simplified explanation. There are other gases involved in plant processes, but these are the most important ones.
