| A | B |
|---|
| rumen | gullet or first stomach |
| microbes | bacteria and fungi in the rumen |
| cellulose | plant material that is broken down |
| digestion | why cows need four stomachs |
| dairy products | things like milk and cheese |
| symbionts | things that live together in the rumen |
| hay and grass | food broken down by microbes |
| sheep | another ruminant animal |
| 40 gallons | how much a rumen can hold |
| anaerobic respiration | what is fermentation |
| anaerobic | needing no oxygen |
| methane | gas produced by microbes |
| Archaea | ancient bacteria |
| enzymes | special proteins that break down hay |
| ecology | environment: how to keep cows healthy |
| food web | which animals eat which other plants and animals |
| herbivore | animal who eats plants |
| producer | thing that makes food for others to eat |
| consumer | animal that eats a producer |
| sun's energy | light to start photosynthesis and food web |
| decomposers | microbes that eat animal waste and turn it back into rich soil |
| earthworms | help the soil by making holes for oxygen and nutrients to pass through |
