Teacher: Teacher Qu.
Activity objectives:
1, know the harm of pesticide residues, know several methods to remove pesticides, and know how to protect your health.
I am willing to find a way to acquire knowledge through my own efforts.
3, like to cooperate with peers, * * * has exploration, * * * has sharing.
Activity preparation:
1, to understand the harm of pesticide residues.
2. Courseware: All kinds of fruits and vegetables
Activity flow:
1, understand why pesticides are used in vegetables and fruits.
Chemical control technology based on spraying pesticides is the main means of pest control at present, and it is also an important measure to ensure the production safety and effective supply of fruits and vegetables.
As long as pesticides are used according to regulations, fruits and vegetables treated with pesticides will not affect people's health.
2, understand several methods to remove pesticides:
(1) Don't worry about not eating the fruits and vegetables you buy home.
After you buy your vegetables and fruits home, you might as well put them in the natural circulation air for a few days, especially green vegetables such as Chinese cabbage, Chinese cabbage and leek.
It can accelerate the natural decomposition of residual pesticides, especially in cold winter, and many vegetables will not rot if they are left outside for a few days.
You can use this method more often. In the hot season, if you are worried about rot,
It can be stored in a large refrigerator for a few days. As long as the internal air circulation is maintained, it can also help the residual pesticides to volatilize.
(2) Special detergent is not as good as boiled water.
Washing vegetables and fruits is very important. Effective washing can remove about 95% bacteria, 60% pesticide residues and almost all parasite eggs.
Spinach, chrysanthemum, seeds, Chinese cabbage, etc. Those with small leaves can be cut off and the roots washed before the tap.
Removal of residual pesticides by water impact.
(3) It is advisable to eat fruit or peel it.
For fruits, besides being thoroughly washed, it is best to peel them before eating.
(4) Discussion: Which method is the best.
Guide children to understand that each method has suitable and unsuitable fruits and vegetables, and choose different methods according to the different characteristics of each fruit and vegetable.
Teacher's summary: Vegetables and fruits can remove pesticides in many ways.
3. The harm of pesticide residues to human body
Knowing that pesticide residues can cause abdominal pain, diarrhea, indigestion, cardiovascular and cerebrovascular diseases, and even life-threatening.
Activity expansion:
The extension and expansion of organic infiltration in daily life can guide children to pay attention to food hygiene in daily life.
More kindergarten lesson plans are available: Qu Teacher Lesson Plan Network