Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

Unit 5

Respiration, Photo sythesis and Carbon Dioxide

There is more carbon dioxide in the air surrounding plants at night and less during the day. Less Carbon dioxide is used during the winter and the level of carbon dioxide rises. In the summer carbon dioxide levels fall.

Human Activity and the carbon cycle

Buring fossil fuels release carbon dioxide,. Burning trees releases locked carbon compounds. Result is that there is a steady increase of level of carbon dioxide in atmosphere. Lined to Global warming as carbon dioxide is a greenhouse gas.


Argicultral use, mining, timber, room for roads and towns. Nitrogen in soil is lost but ash from trees puts back nutrients. Over times amount of crops decline as nutrients removed with crop, and nutrient leaching.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording