| Category | Format | Size |
|---|---|---|
| Fourth Grade Science Volume 2, Textbook Edition | pptx | 6 MB |
"Animal Eggs" New Life PPT
Description
"Animal Eggs" New Life PPT
Part One: Animal Eggs
Collect eggs from various animals and observe how they are similar and different.
Butterfly eggs Frog eggs Toad eggs
Fish eggs, various bird eggs
If we look at the outside of an egg with a magnifying glass, what will we find?
What are the characteristics of the shape of an egg?
Are there any small holes in the shell of the egg?
Are egg shells easily broken? Try pinching it with your hands.
Can we speculate on the role of various egg parts in embryonic development?
The egg's oval shape can withstand greater pressure.
There are small holes in the eggshell for ventilation.
The egg is larger at one end and smaller at the other. At one end of the large end of the egg, the eggshell membrane separates to form an air chamber, which supplies the oxygen needed for embryonic development.
Animal eggs PPT, part 2: hatching of frog eggs
An animal's egg contains new life, and when the conditions are right, it will develop and grow into a new animal.
Plant an aquatic plant with frog eggs in the aquarium and observe the changes in the frog eggs.
Frog eggs can hatch into tadpoles in about 10 days. A tadpole can grow into a small frog within a few weeks.
Animal eggs PPT, part three: hatching of chicks
Observe pictures of the changes in eggs as they hatch and learn how chicks come into the world.
fertilized egg stage
The little white spots on the yolk are where the embryo develops.
embryonic development stages
During this period, the embryo continues to divide and develop into young individuals. The body structure gradually forms, and beaks and feathers gradually grow.
period of birth
The mature chick pecks open the eggshell with its immature beak and leaps out.
After the chicks emerge from their shells, their feathers are dried and they can begin to walk around in search of food.
What conditions are required for the hatching process of chicks? Check out the literature to learn more about hatching chicks.
The basis for chick hatching is hatching eggs, and the quality of hatching eggs plays a major role in the hatching of chicks. Eggs must come from healthy, well-nourished populations with an appropriate male-to-female ratio. The eggs should be of moderate size and fresh and viable eggs should be selected.
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For more information about the "New Life Animal Eggs" PPT courseware, please click the New Life ppt Animal Eggs ppt tag.
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Update Time: 2024-06-28
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