"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 2

Description

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 2

learning target

1. Be able to tell what nutrients are in food that are necessary for the human body.

2. Name the main functions of various nutrients.

3. Use scientific inquiry methods to determine the energy in food.

4. Agree that human nutrients mainly come from other organisms in the biosphere.

ANALYSE information

1. Do different foods contain the same types and amounts of nutrients?

different. Different food types should be chosen according to body needs

2. Cell life cannot be separated from matter and energy. So what is the connection between the nutrients in food and the substances contained in the cells of the human body?

The nutrients and energy contained in food are the sources of substances and energy contained in human cells.

3. Nutrients in food:

Protein, fat, sugar, vitamins

The role of nutrients

Carbohydrates, fats and proteins are the main organic compounds that make up cells and can provide energy for life activities.

Determine the energy in a food

1. Ask questions:

1. Does food really contain energy?

2. How much energy do peanut seeds contain?

3. Which one contains more energy, peanut kernels or walnut kernels?

2. Make assumptions:

1. Food does contain energy.

2. The energy in walnut kernels is more than that in peanut kernels.

3. Make a plan:

Cans, Erlenmeyer flasks, thermometers, peanut seeds, scales, etc.

discuss

1. Is there any difference between the measured data and the attached table data? what is the reason?

The main reason for the difference is the loss of heat energy, and also due to insufficient combustion of food.

2. Are the measured data the same as those of other groups? If different, what is the reason?

If they are different, the reason may be that the experimental operation is not standardized enough and the measurement is not standardized enough.

3. This research experiment is only done once. Are the results reliable? What should be done?

If you do it once, there may be errors, so the results are unreliable. It should be repeated multiple times under all conditions being the same, and the average of these multiple times should be taken to minimize the impact of errors.

Class exercises:

1. The energy substance for human life activities and maintaining a constant body temperature is ( )

A. Protein B. Carbohydrate C. Fat D. Vitamin

2. Among the following equal amounts of substances, the one that contains the most sugar is ( )

A. Sesame, peanut B. Carp, soybean

C. Liver, flour D. Potato, cornmeal

3. In a state of long-term starvation, the weight loss is obvious ( )

A.Brain B.Skeletal muscle C.Subcutaneous fat D.Kidney

The role of water and inorganic salts

Water is the main component of cells. All life activities of the human body cannot be carried out without water; nutrients and wastes such as urea in the human body can only be transported if they are dissolved in water.

Inorganic salts: account for about 4% of the body weight, which is very small, but has a great effect. It is an important material that constitutes human tissue. If it is lacking, corresponding diseases will occur.

Important tips

Plant foods do not contain vitamin A, but foods such as green vegetables, fruits, and carrots contain carotene, which can be converted into vitamin A in the human body.

The sun can convert cholesterol in cells into vitamin D, which can promote calcium absorption.

Compliance test questions

1. Among the nutrients in the human body, those that can provide energy for human physiological activities are.

A.Protein, carbohydrate, water

B. Protein, sugar, vitamins

C. Protein, carbohydrate, fat

D. Various organic substances stored in the body.

2. Which of the following groups of foods cannot all be used as energy sources for the human body?

A. Carbohydrates, fats, proteins

B. Water, inorganic salts, protein

C. Cellulose, fat, starch

D. Vitamins, water, inorganic salts

3. The main energy supply substance of the human body is

A. Protein B. Carbohydrate C. Fat D. Vitamin

little doctor

1. Children are susceptible to rickets because they are in a period of growth and development and need more ____.

2. Xiaohong is suffering from anemia and may be lacking ___ in her body. She should eat more __________ and other foods.

3. Endemic goiter (big neck disease) is caused by a lack of ___, so you should eat more _________ and other foods.

4. Xiao Ming doesn’t like to eat vegetables, and his gums often bleed when brushing his teeth recently. He may be lacking ________ in his body.

Keywords: Chemistry and Social Life Teaching Courseware, Nutrients in Food Teaching Courseware, Beijing Curriculum Reform Version 9th Grade Chemistry Volume 2 Chemistry PPT Courseware Download, 9th Grade Chemistry Slide Courseware Download, Chemistry and Social Life PPT Courseware Download, Food in Food Nutrients PPT courseware download, .PPT format;

For more information about the PPT courseware "Chemistry and Social Life Nutrients in Food", please click the Chemistry and Social Life ppt Nutrients in Food ppt label.

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 4:

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 4 Knowledge Network Nutrients in food The role of sugars in the human body: The main source of energy in the human body The properties of common sugars and the classification of food sources oils and fats The role of fats and oils in the human body : human body..

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 3:

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 3 Learning Objectives 1. Understand the main nutrients contained in food; 2. Understand the sources of various nutrients and their effects on the human body. 3. Understand the sources and deficiencies of inorganic salts and vitamins; focus...

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware:

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware Discussion Choose 2 foods you like to eat from the following foods and tell them what ingredients they contain? Compare: Accurately and quickly outline the functions of the following six nutrients from the textbook, and analyze...

File Info

Update Time: 2024-10-19

This template belongs to Chemistry courseware Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 2 industry PPT template

Preview