Question

1. What is the difference between mass and weight.


2. Explain various effects of force.


3. How can we select good and healthy seeds.


4. Define agriculture and give few examples of crop plant.


5. Write one use for each of the following : a)Lead b) Iodine
c) Chlorine.

answer this​

Answer 1

1.The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force)

2.A force acting on an object causes the object to change its shape or size, to start moving, to stop moving

3.Take a contanier, fill it with water. Take some seeds and put it in the contanier. After sometime you will notice that some seeds will float and will remain at the bottom of the container. The seeds which are floating are unhealthy seeds and the seeds which are at the bottom of container are the healthy seeds

4.Agriculture is the cultivation of land and breeding of animals and plants to provide food, fiber, medicinal plants and other products to sustain and enhance life. Some Examples of crops are wheat, rice, maize, jowar, bajra, cotton, rubber, tea ,coffee etc

Answer 2

Answer:

1. The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton.
2. A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there's the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direct.
3. Take a contanier, fill it with water. Take some seeds and put it in the contanier. After sometime you will notice that some seeds will float and will remain at the bottom of the container. The seeds which are floating are unhealthy seeds and the seeds which are at the bottom of container are the healthy seeds.
4. Agriculture is the cultivation of land and breeding of animals and plants to provide food, fiber, medicinal plants and other products to sustain and enhance life. Some Examples of crops are wheat, rice, maize, jowar, bajra, cotton, rubber, tea ,coffee etc....
5. uses of. Lead, Iodine, Chlorine.

• lead - Lead is still widely used for car batteries, pigments, ammunition, cable sheathing, weights for lifting, weight belts for diving, lead crystal glass, radiation protection and in some solders. It is often used to store corrosive liquids.
• uses of. Lead, Iodine, Chlorine.
• Iodine - Today, iodine has many commercial uses. Iodide salts are used in pharmaceuticals and disinfectants, printing inks and dyes, catalysts, animal feed supplements and photographic chemicals. Iodine is also used to make polarising filters for LCD displays.
• Chlorine - Chlorine kills bacteria – it is a disinfectant. It is used to treat drinking water and swimming pool water. It is also used to make hundreds of consumer products from paper to paints, and from textiles to insecticides. About 20% of chlorine produced is used to make PVC.