| A | B |
|---|
| Carbon dioxide | the gas given off as the yeast grows |
| dough | the substance baked to make bread |
| fungus | a living thing like a plant, with no leaves or flowers |
| microscope | a tool used to see very small things that can not be seen with the eye. |
| organism | a living thing |
| sugar | what the yeast needs in order to grow |
| yeast | makes bread dough rise, or get bigger |
| air pockets | bubbles of carbon dioxide |
