[Explain] What is plantation agriculture ?

The form of commercial farming where crops are grown for profit is known as plantation agriculture. Large land areas are much needed for this sort of agriculture farming. In our country it was introduced by the Europeans in colonies situated in the tropics. Roughly, the important plantation crops are sugarcane, bananas, coffee, tea, cocoa, oil palm, rubber, cotton, and pineapples. The important features of this type of farming are a large capital investment, cheap labour, scientific methods of cultivation, large estates or plantations, managerial and technical support, single crop specialisation, and a good system of transportation. This links the estates to the factories and markets for the export of the products. 

The French established cocoa and coffee plantations in West Africa. Britishers set up rubber estates in Malaysia, large tea gardens in India and Sri Lanka, and sugarcane and banana plantations in West Indies. Extensive Commercial Grain Cultivation in crops like coconut and sugar cane plantations in the Philippines are mainly invested by Spanish and Americans. It is a method of commercial farming where the main purpose is to earn profit through crops. One required big land areas for this type of agriculture. The tropical climate is the important thing in this type of farming, therefore countries that have plantation agriculture usually experience high annual temperatures and obtain heavy downpour. Plantation agriculture has its roots in the past. A number of plantations were set up by westerners and their companies at the early stages of the 18th and 19th centuries. They employed either local or foreign workers who were willing to work for a small wage. Like for e.g., many workers from India are employed in the rubber plantations set up by the British in Malaysia. These days, the majority of the plantations are possessed by the local governments or multinationals.

[Explain] Define reflection of light

Bouncing back of light rays after hitting any surface is called reflection of light. If the surface is smooth and shiny, the light will reflect at the same angle at which it hits the surface. This is called regular reflection and produces good images. If the surface is rough and uneven, then some light rays may get absorbed, while others may reflect at varied angles, called as irregular reflection.

[Explain] What is resource planning? Why is resource planning essential? Explain with any 3 examples 

Resource planning is said to be the crucial part of any business project or management plan. This phase finds out the resources needed to deliver a project by small business owners. They need to identify all within a specific timeframe. In this respect, anything counts as a resource: staff members, roles and responsibilities for each member, equipment for doing the work. Resource planning also includes a schedule with detailed information about what needs to be completed and when. A good and sound resource plan features how many developers or designers required, the amount of resource needed, schedule dates needed for using planned resources. Also while and for much time long do small business owners need people for task assignment. Resource planning is the wise, judicious and proper utilisation of the resources. 

     

The resources are not evenly distributed in our country, so, the proper planning for resource use serves the following purpose;

• It saves the environment from degradation.

• It makes a sustainable use of the resources without compromising with the share for future generation.

• It makes an equitable distribution of benefits for all.

• It helps to identify the various resources present in different regions of the country. It helps in reducing the wastage of resources.

• It helps to identify the various resources present in different regions of the country.

• It helps in the conservation of various non-renewable/extinguishable resources.

• It helps in the equal distribution of resources among the regions that have an acute shortage of it.

• It helps in keeping track of remaining resources. It helps to take care of future generations.

Sincere efforts have been made from India for achieving the resource goal planning. It has been done since the inception of the First Five Years Plan launched right after her independence. Some examples are as follows:-

• Land Utilization and Planning: – There are different land planning and conservation measures we can take to protect this natural resource. Controlling over-grazing in open pastures, stabilizing sand dunes, proper management of wastelands, controlling mining activities, proper disposal of industrial waste, reducing land and water degradation in industrial areas.

• Soil Conservation: – Drastic farming and mass production lead to heavy soil erosion and reduced fertility of the soil. There are different methods of controlling soil erosion such as contour ploughing to reduce the flow of water during irrigation, terrace farming to reduce soil erosion, planting shelter belts for plants.

[Explain] 10 examples of diffusion in everyday life

1. You can smell perfume because it diffuses into the air and makes its way into your nose.

2. Cigarette smoke diffuses into the air.

3. A few crystals of potassium permanganate in water will diffuse and turn the water purple.

4. Leave a soda bottle open and the carbon dioxide bubble will diffuse and leave it flat.

5. A tea bag placed in a cup of hot water will diffuse into the water.

6. Aroma of food diffuses into the air and smell reaches you

7. Oxygen and carbon dioxide diffuse to and fro from blood to the body cells

8. In leaves, oxygen from the leaf cells diffuses out to the air.

9. Alloys are examples of diffusion, as in copper being diffused in a copper alloy.

10. Heat is diffused during heat conduction, such as a mug getting hot when a hot liquid is placed in it.

[Explain] What is the full form of pH ?

pH stands for potential of Hydrogen. It represents the ratio of Hydronium ions (H3O) to Hydroxide ions (OH). It is a measure of acidity and alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline. A pH level of is 7.0 at 25°C is defined as ‘neutral’ because the concentration of H3O+ equals the concentration of OH− in pure water.

[Explain] Why is only mercury used in clinical thermometer ?

A clinical thermometer is used to measure human body temperature. It consists of a long glass tube which is graduated. A thermometric liquid is present within the tube which expands proportionally to temperature,hence measures it.

Mercury is best suited as a thermometric liquid:

1. It expands uniformly when heated.

2. It has low specific heat capacity.

3. I has a high boiling point (357 °C) and a low freezing point (-39 °C).

4. It is a good conductor of heat.

5. It does not stick to the walls of the glass tube.

6. It is opaque and shiny and hence clearly visible.

7. It is available in pure form.