1, carbohydrate: mainly comes from food such as grain, vegetables and fruits. Carbohydrate is the most basic energy source of the body, which can provide energy and maintain the body function.
2, protein: mainly from meat, fish, beans, milk and other foods. Protein is very important for human growth and development, maintaining body tissues and repairing damaged tissues.
3. Fat: mainly comes from animal foods such as meat, milk and vegetable oil. Fat can provide fat-soluble vitamins for the body, as well as energy and protect body organs.
4. Vitamins: including water-soluble vitamins and fat-soluble vitamins, derived from vegetables, fruits, meat, fish and other foods. Vitamins play an important role in human metabolism, immune system and nervous system.
5. Minerals: mainly from vegetables, fruits, meat, fish and other foods. Minerals play an important role in human bones, teeth and blood.
Pay attention to the following points when making PPT in the second volume of ninth grade chemistry, "Important nutrients for human beings".
1. Concise and clear: Make sure the PPT content is concise and clear, avoid too many words and complicated charts, and make it easy for the audience to understand.
2. Clear structure: PPT content is organized in a logical order, and can be introduced in the order of carbohydrate, protein, fat, vitamins and minerals, and each part has a clear title and content.
3. Pictures and charts: Use relevant pictures and charts to support your content, such as food pictures, molecular structure charts or nutrient content comparison charts, which will help students better understand and remember.
4. Highlight key information: In order to ensure that important information or key concepts are highlighted in PPT, bold and color-coded methods can be used.
5. Provide cases: In order to increase the visibility of practical application, you can provide some real cases related to nutrients, such as a certain food is rich in certain nutrients, or what problems will be caused by the lack of certain nutrients.