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Labelled, with what happens at each stage

To label, with a word bank

To label, then the answer key

To cut and glue in order, then the answer key

A hatch log for the 21 days in the incubator

Which sheet to print

The labelled sheet explains the four stages and when each comes. To label, a child writes egg, embryo, chick or hen in each box, with the word bank under the pictures. To cut and glue, the child cuts out the four pictures and glues them in order, following the arrows from the egg in box 1: a good first sheet for a child who is not yet writing. To cut and glue prints the labelled sheet after it as the answer key, and so does To label, then the answer key. The hatch log is for a class hatching eggs: a row for each of the 21 days, with a box for each turn, the temperature, and what is forming inside the egg that day.

Hatching eggs in class

Eggs from a grocery store are no good for hatching: most are not fertile, because a hen lays fertile eggs only when there is a rooster in the flock. A chicken egg takes 21 days to hatch, sometimes a few hours more, and 21 days is exactly three weeks, so eggs set in the incubator on a Monday are due on a Monday, not over a weekend. Wash hands after touching the eggs or the chicks. This follows University of Missouri Extension and Poultry Extension.

Turning the eggs

If the incubator does not turn the eggs, mark each one with an X on one side and an O on the other, so you can see which way up it is. Turn them at least three times a day: first thing in the morning, last thing at night, and once or twice in between, an odd number of times if you can; on Letter or A4 the hatch log has a box for each of five turns. Stop on day 18, when the chick starts to move into place to hatch. This follows Poultry Extension and University of Missouri Extension.

The last days before the hatch

On day 17 or 18, three or four days before the hatch, candle the eggs: shine a flashlight through each one, and take out any that are not growing. Keep the humidity at 60 to 65 percent through day 18, then raise it to 70 percent for the last three days, and open the incubator as little as you can while the chicks hatch. The hatch log prints both reminders under the table. This follows University of Missouri Extension.

Beside the frog and the butterfly

All three start as an egg. A tadpole and a caterpillar hatch looking nothing like their parents and change as they grow; a chick does its changing inside the shell and hatches as a small chicken in down, ready to get up and move about.

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Water cycle diagram

A picture of the water cycle to print: the ocean, the land, a tree, a mountain, a cloud and the Sun, with evaporation, transpiration, condensation, precipitation and groundwater marked on it and what each step means under it. Print it labelled, or with empty boxes and a word bank, and the labelled one after it as the answer key.

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