Garbage generation
Teaching objectives:
1, scientific concept: people will produce a lot of garbage with complex components in their lives, which will pollute the environment once discarded.
2. Process and method: investigate and count the name, weight and type of garbage produced in a day in the family.
3. Emotion, attitude and values: realize that everyone produces garbage every day, which will cause damage to the environment. Pay attention to the direction of garbage and raise awareness of environmental protection.
Teaching emphases and difficulties:
Difficulties: arrange students to take garbage weighing and measuring as required.
Key points: guide students to discuss the problems caused by a lot of garbage.
Teaching preparation:
1. Arrange students to collect domestic garbage for one day in advance, and send one student from each group to take the garbage to school for classification, weighing and statistics.
2. Collect pictures of garbage dumps and garbage dumps and pictures of rivers polluted by garbage.
3. The teacher prepares the spring scale.
Teaching process:
First, arrange the collection of domestic garbage before class.
Arrangement: One student in each group will bring their own garbage to the school for classification and statistics. If students have difficulties, they can weigh at home and bring the data to school for statistics, but they must be realistic. Teachers can also bring their own garbage to the school for classification and weighing demonstration. )
Pre-class arrangement:
1, investigate the number of day students.
2. It is required to bring garbage and domestic garbage to school. Conditional students can teach themselves the first lesson of the textbook first, and then classify and weigh the garbage at home.
2. Classify and weigh the garbage every day and fill in the record form.
1. We consume food and all kinds of daily necessities every day, and at the same time produce a lot of garbage. How much garbage will my house have in a day? What's in the garbage?
The teacher demonstrated the classification and weighing of garbage.
2. Students are divided into groups, weighed, and filled in the garbage statistics generated by my family in one day. The teacher reminded the students to pay attention to safety and hygiene. )
Three. Discussion on garbage
1, please talk about the sources of all kinds of garbage.
2. The teacher draws a big table on the blackboard and counts the total weight of garbage produced by all families in the class.
3. Fill in the form after the students report and calculate the average weight of garbage produced by each person every day.
4. Read the data of daily garbage output per capita in Beijing, and exchange your thoughts on garbage output in groups.
5, the whole class communication, teacher guidance at least refine the following points:
(1) People's family life will produce a lot of garbage.
(2) Industrial production and agricultural production, shopping malls and schools will also produce a lot of garbage.
(3) After a large amount of garbage is discarded, it will cause serious pollution to the environment, thus affecting our life and health.
(4) Garbage needs scientific treatment to reduce environmental pollution.
Fourth, class summary: discuss and record the knowledge related to garbage learned through learning, and also record some thoughts generated by learning this lesson.