Podcast
Questions and Answers
What is the primary breeding condition for mosquitoes?
What is the primary breeding condition for mosquitoes?
- In dry areas
- In running water
- In windy conditions
- In stagnant water (correct)
Which disease is caused by a protozoan?
Which disease is caused by a protozoan?
- Malaria (correct)
- Tuberculosis
- Polio
- Typhoid
What preventive measure is commonly associated with chickenpox?
What preventive measure is commonly associated with chickenpox?
- Use mosquito nets
- Vaccination (correct)
- Maintain good sanitary habits
- Consume properly cooked food
For typhoid prevention, which of the following is essential?
For typhoid prevention, which of the following is essential?
What is a recommended practice to reduce the spread of tuberculosis?
What is a recommended practice to reduce the spread of tuberculosis?
Which microorganism is responsible for causing measles?
Which microorganism is responsible for causing measles?
What general preventive measure can help avoid diseases spread by water?
What general preventive measure can help avoid diseases spread by water?
Which method is not effective against the spread of malaria?
Which method is not effective against the spread of malaria?
What is the main purpose of levelling the field?
What is the main purpose of levelling the field?
Which component of the plough is responsible for breaking the soil surface?
Which component of the plough is responsible for breaking the soil surface?
What tool is primarily used for removing weeds and loosening soil?
What tool is primarily used for removing weeds and loosening soil?
Why is manure sometimes added to the soil before tilling?
Why is manure sometimes added to the soil before tilling?
What animal is commonly used to operate a plough?
What animal is commonly used to operate a plough?
What is the main material increasingly replacing in indigenous wooden ploughs?
What is the main material increasingly replacing in indigenous wooden ploughs?
Which part of the plough is attached to the bulls' necks?
Which part of the plough is attached to the bulls' necks?
What benefit does moistening the soil have before sowing seeds?
What benefit does moistening the soil have before sowing seeds?
What is the primary benefit of loosening soil for root growth?
What is the primary benefit of loosening soil for root growth?
Which organisms are mentioned as beneficial for soil health?
Which organisms are mentioned as beneficial for soil health?
What is a purpose of tilling or ploughing the soil?
What is a purpose of tilling or ploughing the soil?
Why can paddy not be grown in winter?
Why can paddy not be grown in winter?
What materials are traditional ploughs commonly made from?
What materials are traditional ploughs commonly made from?
How do earthworms contribute to soil quality?
How do earthworms contribute to soil quality?
What is essential for inculcating creativity and initiative in children?
What is essential for inculcating creativity and initiative in children?
What is NOT a component of soil mentioned as necessary for crop growth?
What is NOT a component of soil mentioned as necessary for crop growth?
What happens to dead plants and animals in the soil?
What happens to dead plants and animals in the soil?
What does flexible daily time-table imply for schools?
What does flexible daily time-table imply for schools?
How have syllabus designers addressed the issue of curricular burden?
How have syllabus designers addressed the issue of curricular burden?
What kind of experiences does the textbook prioritize?
What kind of experiences does the textbook prioritize?
What aspect of education does the NCERT aim to improve through feedback?
What aspect of education does the NCERT aim to improve through feedback?
Who is acknowledged for their contribution to developing the textbook?
Who is acknowledged for their contribution to developing the textbook?
Which principle is emphasized about children’s experience at school?
Which principle is emphasized about children’s experience at school?
Who led the advisory group in science and mathematics for the textbook development?
Who led the advisory group in science and mathematics for the textbook development?
What is one primary reason food can become poisonous?
What is one primary reason food can become poisonous?
What common condition can lead to bread being attacked by fungus?
What common condition can lead to bread being attacked by fungus?
Which of the following is NOT a chemical preservative used in food preservation?
Which of the following is NOT a chemical preservative used in food preservation?
How does refrigeration help in food preservation?
How does refrigeration help in food preservation?
What is pasteurization primarily used for?
What is pasteurization primarily used for?
Which of the following foods is least likely to spoil quickly due to preservatives?
Which of the following foods is least likely to spoil quickly due to preservatives?
What happens to food that has spoiled, according to the content?
What happens to food that has spoiled, according to the content?
What methods should be used to store food at home to prevent spoilage?
What methods should be used to store food at home to prevent spoilage?
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Study Notes
Crop Production and Management
- Farmers loosen the soil to allow roots to breathe easily and promote the growth of earthworms and microbes, which further loosen the soil and add humus.
- Ploughing is the process of loosening and turning the soil, traditionally using a wooden plough drawn by animals.
- Iron ploughs are increasingly replacing wooden ploughs for tilling the soil, adding fertilizers and removing weeds.
- Levelling the field is essential for sowing and irrigation, ensuring even distribution of water and seeds.
- Manure is added to the soil before tilling to enrich it with nutrients and ensure proper mixing.
Importance Of Loosening the Soil
- Loosening the soil allows roots to breathe, while earthworms and microbes enhance soil quality.
- Turning the soil brings nutrient-rich layers to the top, making them accessible to plants.
- Dead plants and animals decompose in the soil, releasing nutrients that are reabsorbed by plants.
Agricultural Implements
- A plough breaks up soil clumps, incorporates fertilizers, removes weeds and turns the soil. It consists of a wooden or iron frame with a strong triangular iron strip called a ploughshare and a shaft.
- A hoe, a simple tool with a long rod and a bent iron plate, is used for removing weeds and loosening soil around plants.
- A cultivator is a machine with rotating blades that breaks up soil clumps and prepares the field for sowing.
Malaria
- Mosquitoes breed in water.
- Keeping surroundings clean and dry helps prevent malaria by eliminating mosquito breeding grounds.
Food Preservation
- Food spoils when microorganisms attack and decompose it, causing bad smell, taste, and color changes.
- Food preservation methods aim to inhibit the growth of microorganisms.
- Refrigeration inhibits microbial growth by lowering temperatures.
- Salts and edible oils are common preservatives that act as barriers to microbial activity.
- Pasteurization involves heating milk to 70°C for 15-30 seconds to kill harmful microbes and prevent spoilage.
Food Poisoning
- Microorganisms can produce toxic substances that cause food poisoning when consumed.
- Prompt medical attention is necessary for food poisoning symptoms like vomiting.
- Food poisoning can result from eating spoiled food contaminated with toxic-producing microorganisms.
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