Activity goal: 1. Understand the name, appearance characteristics and internal structure of tomatoes, and know that tomatoes have good nutrition.
2. Be able to boldly express your findings in words. Activity preparation: some tomatoes, ppt courseware, emphasis and difficulty: understanding the tomato activity process from the appearance characteristics and internal structure: First, import activities: children, today we have a special friend in our class. Guess who it is? You should listen carefully! (riddle: the face is round like an apple, sweet and sour and nutritious. You can cook as well as make fruit. )
Have you guessed, children? Look, here comes the little tomato. (Courseware demonstration, dubbing: Hello, I'm a tomato) Second, know the name of a tomato: Courseware demonstration, dubbing: "Do you know? I also have a nice name. What's it called? " (Tomato) Third, know the shape characteristics of tomatoes: 1, (PPT has mature and immature tomato babies) Dubbing: "Look, what color clothes am I wearing?" Children, do you know why some small tomatoes wear green clothes and some small tomatoes wear red clothes? (Name the colors of mature and immature tomatoes) The original immature tomato baby wears green clothes, and the mature tomato baby changes into red clothes.
2. Listen carefully, children. What else does Little Tomato want to tell us? Voice-over: "What does my body look like?" (circle) 3. Voice over: "I think children have good skin, so what do you think of my skin?" Just now, the little tomato asked us a question. Now the teacher asks the children to touch the small tomato and see what the skin of the small tomato looks like. (The class teacher sends tomatoes) (slippery, smooth) (Praise the children's good words in time) 4. Summary: The children carefully observed and found that the tomato baby was round and fat; The little tomato is not mature yet, wearing green clothes; When it is mature, put on red clothes. Its skin is as smooth as yours! Do you think little tomatoes are beautiful? Fourth, understand the internal structure of tomato: 1, such a beautiful little tomato, can you guess what is in its belly? (Let the children talk first) 2. (Cut tomatoes and play ppt) The children said a lot. Now let's have a look! Emphasize the danger of knives, and the teacher should cut them. ) There are small cut tomatoes in front of the children. Please observe them carefully and tell the children around you what you see. 3. Summary: The children looked carefully and found that there was a thin layer of skin outside the tomato, and there was red pulp under the skin. There were several small houses inside, and there were a lot of water and round seeds in each house.
5. Understand the nutrition of tomatoes: 1. Would you like to be friends with such a lovely little tomato? (PPT shows dishes made of tomatoes, such as scrambled eggs with tomatoes. ) Hey, is Little Tomato playing hide-and-seek with us? Where is it hidden? Come and find it, children. The children are really great. They can find out where the little tomato is right away. )
Have you eaten all these dishes made of small tomatoes? 2. Why do people like tomatoes so much? It's nutritious and delicious. Eating more tomatoes can also supplement vitamins, which makes children grow great. Sixth, end the activity: However, the teacher found that some children don't like tomatoes. Look, small tomatoes are beautiful and nutritious, and everyone likes them very much. So children who don't like tomatoes should get rid of the habit of picky eaters, okay? Now we are friends with Baby Tomato, and it wants to invite children to dance with it. Would you like to? Let's invite the little tomatoes out together! (A teacher plays a tomato with a big headdress, and the dance between teachers and students ends) (PPT plays FLASH) Teacher: Today, we met another good friend, that is our tomato baby, children. Let's introduce this new friend to the visiting teacher.
2. The comparison of Chinese and western persimmons and persimmons in the teaching plan of kindergarten middle class.
Reflections on the Teaching Plan Design of "Understanding Tomatoes" in Middle School Science Activities
1. Name of the activity: The scientific activity "Understanding Tomatoes" in the middle class.
Second, coach: Li Jiao Lotus
Three. Activity objectives:
1, use a variety of senses to perceive the characteristics of tomatoes, and boldly say what you found in the observation.
2. Know that eating tomatoes is good for your health.
3. Experience and enjoy the fun brought by scientific observation activities.
Fourth, the focus and difficulty of the activity:
Key points: 1. Perceive the characteristics of tomatoes with a variety of senses, and boldly speak out the findings in observation.
2. Know that eating tomatoes is good for your health.
Difficulties: 1, knowing that eating tomatoes is good for your health.
2. Experience and enjoy the fun brought by scientific observation activities.
Verb (abbreviation for verb) activity preparation:
1, material preparation: tomatoes
2. Knowledge preparation: guide children to use a variety of senses to perceive the characteristics of surrounding objects in daily life and cultivate their observation ability.
Activity process of intransitive verbs:
(1) Introduce riddles to stimulate children's interest in activities.
Teacher: Today, the teacher brought a new friend. I hid it in a riddle.
Riddle: Round face is like an apple. It is sour, sweet and nutritious. It can be used for cooking and fruit.
Teacher: Children, can you guess who this friend of the teacher is?
Yang: Raise your hand and answer freely.
Teacher: Tomatoes also have a nice name, called "tomato".
(2) Observing for the first time, using the senses to perceive the external characteristics of tomatoes.
1, Teacher: What does it feel like to touch it with your hands? Take a look with small eyes. What color is that? What shape? Smell it with your nose. What is this?
2. Teacher: Ask the children to observe carefully and quietly, and ask the children to boldly say what they found in the observation.
3. Teachers and children summarize the external characteristics of tomatoes.
Teacher: What color are the tomatoes you see with your eyes? What shape? What does it look like to touch tomatoes with your hands? What does it feel like? What's the smell of tomatoes with your nose?
4. Teacher's summary: Tomatoes are round and have a red body. It feels slippery and cold with your hands. It smells a bit like tomatoes.
(3) The second observation, to perceive the inherent characteristics of tomatoes.
3. What nutrients do tomatoes contain?
Introduction: Tomatoes are also called tomatoes and persimmons.
According to legend, tomatoes first grew in South America. Because of its delicate color, people are very wary of it, and regard it as "the fruit of the fox", also known as wolf peach, which is only for viewing and dare not taste. Nowadays, many people have delicious food on their dining tables. Tomatoes are rich in carotene, vitamins B and C, especially vitamin P, ranking first among vegetables.
Efficacy: Lycopene has a protective effect on cardiovascular system and can reduce the attack of heart disease. Lycopene has unique antioxidant capacity, which can scavenge free radicals, protect cells, prevent DNA and genes from being destroyed, and prevent the progress of cancer.
Experts at home and abroad believe that tomatoes can not only prevent prostate cancer, but also effectively reduce the risk of pancreatic cancer, rectal cancer, laryngeal cancer, lung cancer and breast cancer. Tomatoes are sweet, sour and slightly cold, and have the effects of promoting fluid production, quenching thirst, invigorating stomach, promoting digestion, cooling blood, calming liver, clearing away heat and toxic materials, and lowering blood pressure. They have a good adjuvant therapeutic effect on patients with hypertension and kidney.
Eating more tomatoes has an anti-aging effect and can keep the skin fair. Nicotinic acid can maintain the normal secretion of gastric juice, promote the formation of red blood cells, help maintain the elasticity of blood vessel walls and protect the skin, so eating tomatoes is also helpful for the prevention and treatment of arteriosclerosis, hypertension and coronary heart disease.
Tomatoes are juicy and diuretic, and patients with nephritis should also eat them. Tomatoes contain a dietary fiber called pectin, which can prevent constipation.
Suitable for people: most people can eat it. Usage: Take 2~3 capsules a day to meet daily needs.
Tip: Don't cook for a long time. Adding a little vinegar to cooking can destroy the harmful substance lycopene.
Green unripe tomatoes are not suitable for eating. Patients with acute enteritis, bacillary dysentery and active ulcer should not eat it.
4. What's the function of tomatoes?
Fruit is rich in nutrition and contains many vitamins.
Make vegetables or fruits. It can also be canned.
Sweet and sour, cool. Ingredients This product is rich in vitamins, minerals, carbohydrates, organic acids and a small amount of protein.
Has effect in promoting digestion, induce diuresis, and inhibiting various bacteria. Vitamin D in tomatoes can protect blood vessels and treat hypertension.
There is glutathione in tomatoes, which can delay cell aging and increase the anti-cancer ability of human body. Carotene in tomato can protect skin elasticity, promote bone calcification, and prevent and treat rickets, night blindness and dry eye in children.
Functions: clearing away heat and promoting fluid production, nourishing blood and cooling blood, invigorating stomach and promoting digestion. [Hypertension, chronic hepatitis] 250 grams of fresh tomatoes, washed and cut into pieces; 100g sliced beef, seasoned with a little oil, salt and sugar, and cooked with food.
Every day 1 time. 【 Weakness, blood deficiency, malnutrition and dizziness 】 Tomato 100g, pork liver 100g, japonica rice 100g, and 3 slices of ginger.
Firstly, the pig liver is washed and sliced, and stirred with salt, soy sauce, raw flour and rice wine; Wash tomatoes and cut into pieces; Wash ginger, peel and shred; Wash japonica rice, put it in a pot, add appropriate amount of water, simmer for 20 minutes, add tomato and ginger, cook for 10 minute, then add pork liver, cook for a few minutes until pork liver is just cooked, and season with food. 【 Fever impairs body fluid, dry throat, excessive hot drinking 】 Tomato 250g, grass carp 200g, tofu, Nostoc flagelliforme 1 pinch, onion 1 root.
First, grass carp is washed, dried, chopped, seasoned, added with Nostoc flagelliforme, and mixed with chopped green onion to make fish balls. Put tofu in a pot, add water, bring it to a boil, add tomatoes, bring it to a boil again, add fish balls and cook it, and season it with food.
【 Gastric ulcer 】 Tomato juice 150ml, potato juice 150ml, taken together, morning and evening 1 time. 【 Gum bleeding 】 Eat tomatoes instead of fruits, 4 a day (about 250g), and take them continuously for more than 2 weeks.
[High-temperature heatstroke] 200 grams of tomatoes are washed and sliced, and decoction is used for tea, both hot and cold. 【 Hypertension and fundus hemorrhage 】 Eat 2 fresh tomatoes on an empty stomach every morning, with a course of treatment of 1 for half a month.
Nutritionists believe that as long as you eat 100-200 grams of fresh tomatoes raw every day, you can ensure the vitamins and minerals needed by the human body, but you should pay attention to the following points when eating raw tomatoes: 1, and don't eat immature tomatoes. Immature raw tomatoes contain solanine, which will make the mouth bitter and upset the stomach. Eating too much can lead to poisoning.
2, it is not appropriate to eat a lot of tomatoes on an empty stomach, because tomatoes contain more gum, fruit, persimmon phenol and other ingredients, which are easy to combine with gastric acid to form massive stones, causing stomach pain. 3, acute gastroenteritis, acute bacillary dysentery patients should not eat tomatoes, so as not to aggravate the condition.
4, can not eat rotten tomatoes, in case of poisoning should avoid spleen and stomach deficiency and cold should not take more.
5. What is a tomato?
Tomatoes are also called tomatoes, plums and persimmons.
Originated in South America, it is said that it was brought to Europe by the British Duke during his trip in the16th century, or it may have spread to China from the west, so it is called tomato. Tomatoes can be eaten raw, fried, juiced and made into sauce, and are called "fruits in vegetables" all over the world.
According to the dietotherapy theory of traditional Chinese medicine, tomatoes are slightly cold, sweet and sour; Enter the spleen, stomach and liver meridians. It can nourish yin, promote fluid production, strengthen spleen and stomach, calm liver and clear heat, and is suitable for anorexia, stomach heat and thirst caused by fever and yin injury.
Modern medical tests show that tomatoes are rich in vitamin C. Every 100 grams of tomatoes contains vitamin C 1 1 mg, which is 2% of that of apples. 5 times, the content of vitamin PP is also among the best in fruits and vegetables.
In addition, it also contains carotene 0. 3 1 mg, in addition to calcium, phosphorus and iron, there are more malic acid and citric acid.
There are different opinions about the dietary anti-cancer effect of tomatoes. The Hong Kong Express reported that lycopene can protect people from carcinogens in automobile exhaust and cigarettes.
Lycopene is also an antioxidant, which can inhibit some carcinogenic oxygen free radicals and prevent cancer. Tomatoes also contain glutathione, which can delay cell aging and reduce the incidence of malignant tumors.
Foreign research also found that tomato extract can reduce the specific antigen PSA of patients with prostate cancer, and it is beneficial for patients with prostate cancer to eat more tomatoes. According to the book Luchuan Forage, tomatoes have the functions of invigorating stomach, promoting digestion and treating anorexia, which may be related to malic acid and citric acid. Malic acid and citric acid can stimulate appetite, promote gastric acid secretion, help digestion and enhance gastrointestinal absorption.
People who have poor digestive function or eat more meat and greasy food should eat tomatoes after meals. Obese people and hypercholesterolemia people develop the habit of eating tomatoes regularly, which is beneficial to lose weight and fat, which is also the credit of fruit acid contained in tomatoes.
Tomato also contains lycopene, which can obviously reduce the increase of vascular permeability caused by histamine in Maoxiang field and has anti-inflammatory effect. In addition, tomatoes are also rich in riboflavin, ascorbic acid, vitamin A, vitamin K and so on. It is beneficial to the prevention and treatment of gingival bleeding and oral ulcer.
Examples of tomatoes for dietotherapy are as follows: Ziyin Shengjin Prescription: used for dry mouth and throat, loss of appetite, upset and thirsty, red tongue and little fur caused by insufficient stomach yin or radiotherapy of head and neck. Wash 200 grams of tomatoes, blanch them with boiling water, peel them, mash them, add some rock sugar, and put them in the refrigerator for cooling.
You can always eat it after meals. Wei Qing Jianpi Prescription: It is used for stomach fullness, hiccup, anorexia, halitosis, polydipsia and other symptoms caused by stomach heat or overeating.
Bitter gourd 100g, blanched in boiling water, sliced, slightly boiled with vegetable oil, fried bitter gourd and tomato, washed, crescent-shaped sliced and fried, salted, seasoned and monosodium glutamate, and at the same time, added minced garlic, fried and put into a pot. Cooling blood and stopping bleeding prescription: used for oral ulcer, gingival swelling and pain and mucosal bleeding caused by blood heat, toxic fire or radiotherapy in head and neck.
100g sliced fresh lotus root, 50g black fungus soaked in water, boiled in clear water in a casserole for about half an hour, put in 200g sliced tomatoes, add seasoning such as salt and monosodium glutamate as appropriate, and cook for10min, and beat one egg into soup. Immature green tomatoes contain solanine, which will be poisoned if eaten more, so immature people should not eat them.
Tomatoes are cold, and spleen and stomach deficiency are not suitable. It is best to eat raw tomatoes after meals, to avoid an empty stomach, and to avoid combining with gastric acid to form indigestible substances that cause stomach discomfort.
It has also been suggested that tomatoes should not be eaten with cucumbers, lest the ingredients contained in cucumbers destroy the vitamins in tomatoes. .
6. How to design a small class activity lesson plan of "Understanding Tomatoes"
Activity goal: 1. Understand the name, appearance characteristics and internal structure of tomatoes, and know that tomatoes have good nutrition.
2. Be able to boldly express your findings in words. Activity preparation: some tomatoes, ppt courseware, emphasis and difficulty: understanding the tomato activity process from the appearance characteristics and internal structure: First, import activities: children, today we have a special friend in our class. Guess who it is? You should listen carefully! (riddle: the face is round like an apple, sweet and sour and nutritious. You can cook and make fruit. )
Have you guessed, children? Look, here comes the little tomato. (Courseware demonstration, dubbing: Hello, I'm a tomato) Second, know the name of a tomato: Courseware demonstration, dubbing: "Do you know? I also have a nice name. What's it called? " (Tomato) Third, know the shape characteristics of tomatoes: 1, (PPT has mature and immature tomato babies) Dubbing: "Look, what color clothes am I wearing?" Children, do you know why some small tomatoes wear green clothes and some small tomatoes wear red clothes? (Name the colors of mature and immature tomatoes) The original immature tomato baby wears green clothes, and the mature tomato baby changes into red clothes.
2. Listen carefully, children. What else does Little Tomato want to tell us? Voice-over: "What does my body look like?" (circle) 3. Voice over: "I think children have good skin, so what do you think of my skin?" Just now, the little tomato asked us a question. Now the teacher asks the children to touch the small tomato and see what the skin of the small tomato looks like. (The class teacher sends tomatoes) (slippery, smooth) (Praise the children's good words in time) 4. Summary: The children carefully observed and found that the tomato baby was round and fat; The little tomato is not mature yet, wearing green clothes; When it is mature, put on red clothes. Its skin is as smooth as yours! Do you think little tomatoes are beautiful? Fourth, understand the internal structure of tomato: 1, such a beautiful little tomato, can you guess what is in its belly? (Let the children talk first) 2. (Cut tomatoes and play ppt) The children said a lot. Now let's have a look! Emphasize the danger of knives, and the teacher should cut them. ) There are small cut tomatoes in front of the children. Please observe them carefully and tell the children around you what you see. 3. Summary: The children looked carefully and found that there was a thin layer of skin outside the tomato, and there was red pulp under the skin. There were several small houses inside, and there were a lot of water and round seeds in each house.
5. Understand the nutrition of tomatoes: 1. Would you like to be friends with such a lovely little tomato? (PPT shows dishes made of tomatoes, such as scrambled eggs with tomatoes. ) Hey, is Little Tomato playing hide-and-seek with us? Where is it hidden? Come and find it, children. The children are really great. They can find out where the little tomato is right away. )
Have you eaten all these dishes made of small tomatoes? 2. Why do people like tomatoes so much? It's nutritious and delicious. Eating more tomatoes can also supplement vitamins, which makes children grow great. Sixth, end the activity: However, the teacher found that some children don't like tomatoes. Look, small tomatoes are beautiful and nutritious, and everyone likes them very much. So children who don't like tomatoes should get rid of the habit of picky eaters, okay? Now we are friends with Baby Tomato, and it wants to invite children to dance with it. Would you like to? Let's invite the little tomatoes out together! (A teacher plays a tomato with a big headdress, and the dance between teachers and students ends) (PPT plays FLASH) Teacher: Today, we met another good friend, that is our tomato baby, children. Let's introduce this new friend to the visiting teacher.