Question
Write short notes
Junk food:
Junk food:
✓
Answer
- Foods which gives us energy but do not supply the necessary nutrients are called junk food.
- Foods like chocolate, pizzas, burgers, noodles, fried foods like pakodas are junk food.
- These foods contain refined flour, sugar and oil in large proportion.
- If we consume these foods frequently, our body experiences shortage of proteins, vitamins and minerals.
- This may lead to malnutrition and obesity.
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Write short notes
Vitamins:
Vitamins:
- Take a transparent plastic bottle, a handful of soil, big stones, small stones, sand, some dry leaves and water.
- Cut off the upper tapering part of the bottle. Put the rest of the materials in the lower part and add water.
- Stir the mixture thoroughly and put it aside.
1. How does the mixture in the bottle look now?
2. Do you see the layers in it?
3. What is seen in the different layers from top to bottom?
Read the following stories and answer the questions.
Rita and Geetha are friends travelling from Mumbai to Pune. Seetha had come to the station to see her friends off. After 15 minutes train starts moving. Rita and Geetha feel that Seetha and the vendors on platform are moving backwards. Whereas, Seetha feels that Rita and Geetha are moving forward. Rita feels Geetha is not in motion and Geetha also feels Rita is not in motion. Can you say why?
(1) Are Rita and Geetha in motion?
(2) Are the vendors and Seetha in motion?
(3) What can you conclude from this passage?
1. For which purpose is water being used?
2. Do other living things use water like we do?
3. What are the constituents of soil? Classify them as biotic and abiotic constituents.
Write short notes
Probiotics:
Probiotics:
- Take a transparent plastic bottle, a handful of soil, big stones, small stones, sand, some dry leaves and water.
- Cut off the upper tapering part of the bottle. Put the rest of the materials in the lower part and add water.
- Stir the mixture thoroughly and put it aside.
1. Obtain specimens of soil from various places and note the differences in the specimen with respect to colour, feel, texture and size of the particles.
2. Observe how much water is used and for what purposes it is used in your house for a whole day. Record it in a chart. Discuss this data and find out how much water each person needs in your house.
3. How does the mixture in the bottle look now?
Classify the following substances in the table given below.
(iron, wood, brick, paper, terylene, stone, jute, air, silk, utensils, plastic, rayon, water, wool, dacron, lac, nylon, pearl)
(iron, wood, brick, paper, terylene, stone, jute, air, silk, utensils, plastic, rayon, water, wool, dacron, lac, nylon, pearl)
Classify as directed
Into annual, biennial, perennial
Sunflower, carrot, bajra, mango, jowar, oleander, beetroot, coconut
Into annual, biennial, perennial
Sunflower, carrot, bajra, mango, jowar, oleander, beetroot, coconut
Write short notes
Adulteration of food:
Adulteration of food:
[Chapatti, banana, carrot, butter, Nan, egg, bread, cheese, dal, spinach, milk]