"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.

Keywords: free download of Chinese PPT courseware for the second volume of the fourth grade of the textbook version, animal egg PPT download, new life PPT download, .PPT format;

For more information about the "New Life Animal Eggs" PPT courseware, please click the New Life ppt Animal Eggs ppt tag.

"Animal Reproduction Activities" New Life PPT Download:

"Reproductive Activities of Animals" New Life PPT Download Part One Content: New Knowledge Explanation 1. Reproductive Activities of Oviparous Animals Courtship, Mating, Building Nests, Laying Eggs, Hatching, and Brooding Many activities of animals are to prepare for reproduction. Courtship, mating, building nests, laying eggs, hatching, and brooding. two,..

"Animal Reproductive Activities" New Life PPT:

"Animal Reproductive Activities" New Life PPT Part One: Reproductive Activities of Oviparous Animals Many animals reproduce by laying eggs. Many of the activities of animals are in preparation for reproduction. The stamens of plants are divided into stamens and pistils. Flowers produced by stamens..

"Animal Egg" New Life PPT Download:

"Animal Eggs" New Life PPT Download Part One: New Knowledge Explanation 1. Animal Eggs I discovered that the sizes of eggs of different animals...

File Info

Update Time: 2024-11-25

This template belongs to science courseware Fourth Grade Science Volume 2, Textbook Edition industry PPT template

Preview