| A | B |
|---|
| Shell | The outside protective layer of the egg. |
| Shell membranes | two thin membranes inside the shell that cover and protect the developing embryo until hatching time. |
| Air cell | space between the inner and outer shell membranes that allows the baby chick to receive oxygen. |
| Albumen | The clear white of an egg that makes up over half of the egg’s weight and is made up of mostly water and protein. |
| Chalazae | The thick strands of inner thick albumen at each end of the yolk that anchor the yolk in the center of the egg to keep it from touching the shell. |
| Yolk | The yellow of the egg that comprises about 1/3 of the egg’s weight and provides food for the growing embryo. |
| Germ Spot | The white spot on the yolk where an embryo can begin to develop if the egg has been fertilized and incubated. |
| Incubator | A human made container for hatching eggs. |
| Embryology | the study of the development of an embryo. |
| 3 | The eggs in the incubator should be turned at lease * times a day. |
| 21 | How many days does it take for a chicken egg to hatch? |
| 99.5 | At what temperature should an incubator be kept at to hatch chicken eggs? |
| 60% | At what humidity should an incubator be kept at to hatch chicken eggs? |
| Egg Tooth | The embryo pips (breaks) open the shell with its*. |
| Sticking to the shell | Turning the eggs prevents the embryo from*. |
