2nd Grade, Environmental Science, section II and III

The Cycle of Matter

         Complete the sentences, you can print or rewrite them.

1. Animals take in carbon when they ______________________ and give out carbon dioxide when they ___________________.
2. Plants take in carbon dioxide during ____________________ and give out carbon when they __________________.
3. The carbon in coal, oil, and natural gas come from ____________________.
4. When coal, oil, and natural gas are ____________, carbon is released into the air.