"Animal Eggs" New Life PPT Courseware Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "Animal Eggs" New Life P... | 24525次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Animal Eggs" New Life PPT Courseware is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Animal Eggs" New Life PPT Courseware, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"Animal Eggs" New Life PPT Courseware
Review previous lessons
1. The _____ of male animals and the _____ of female animals combine to form _______, and a new life begins.
2. There are two types of animal reproduction activities.
Oviparous: lay eggs or eggs, such as fish, insects, birds
Viviparous: giving birth to small animals directly and feeding them with milk, such as cats, dogs, and humans.
butterfly eggs
Egg-laying time: spring and summer
Egg-laying method: Spread eggs one by one on plants
Egg size: very small, like a grain of rice
frog eggs
Egg-laying time: early spring
Spawning method: gather eggs in water
Egg size: Large, visible to the naked eye
fish eggs
Egg-laying time: mostly in spring and summer
Spawning method: gather eggs in water
Egg size: Small, about the size of a grain of rice
Observe the most common egg - egg
1.Put the egg in the palm of your hand and squeeze it
It is not easy to crush because the egg is oval and has a high endurance.
2. Use a magnifying glass to observe the surface of the eggshell
There are many small pores on the outside. The chicks need to breathe when they hatch.
3. Observe a raw egg
4. Observe a cooked egg
Egg shell and shell membrane: play a protective role
If the eggshell is soaked in vinegar or some acidic solution for a period of time, the eggshell will disappear and become a shellless egg, leaving only a thin film.
The yolk is the main nutritional part of the egg cell and is surrounded by the vitelline membrane. There is a disc-shaped white spot in the center of the yolk surface, called the blastoderm, which contains the nucleus.
I see:
(Fertilized) raw eggs are composed of shell, egg blue, egg yolk, and embryo. Unfertilized eggs have no embryo, so they cannot hatch chicks.
The protein of cooked eggs is what we often call (egg blue), and the small white dots on it are (embryos), which are formed by the division of fertilized eggs and are the parts that carry out embryonic development.
For the egg composition of other animals, we call it egg shell, egg white, yolk and embryo.
Like frogs and chickens, the method of reproducing offspring by ( ) is called ( ). Animals that reproduce in this way are called ( )
A fertilized frog egg can hatch ( ) in about ( ) days, and it takes about ( ) weeks for a fertilized egg to hatch into a chick.
Which of the following animals lay eggs? ( )
① Butterfly ② Elephant ③ Chicken ④ Snake ⑤ Frog ⑥ Crucian carp ⑦ Turtle ⑧ Snail ⑨ Pigeon ⑩ Tiger
Keywords: New life teaching courseware, Animal eggs teaching courseware, Educational Science Edition fourth grade science PPT courseware download, Volume 2, Fourth grade science slide courseware download, New life PPT courseware download, Animal eggs PPT courseware 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 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...
"Animal Egg" New Life PPT:
"Animal Eggs" New Life PPT Part One: Animal Eggs Collect eggs of various animals and observe their similarities and differences. Butterfly eggs Frog eggs Toad eggs Fish eggs Eggs of various birds Use a magnifying glass to observe the outside of the egg, we will find...
"Animal Eggs" New Life PPT Courseware 3:
"Animal Eggs" New Life PPT Courseware 3 The functions of various parts inside the egg A. Proteins provide nutrients and moisture. B. Egg yolk provides nutrients. C. The embryo develops into a chick. D． The air chamber provides oxygen. E. The eggshell protects the embryo inside the egg. ....