Class 10 Science Chapter 12 Question Answers - Magnetic Effects of Electric Current

Q1: Define afforestation.
Ans: Afforestation is the process of planting trees.

Q2: Why coal is called fossil fuel?
Ans: Coal is generated beneath the surface of the earth by the breakdown of plants that were buried millions of years ago.

Q3:  Define recycling. Give one example.
Ans: Recycling is the act of processing used or unbanned for use in creating new products. For example, shopping bags made of fabric or jute that can be reused are a good option.

Q4: Who was Amrita devi?
Ans: In 1731, Amrita Devi led the first forest movement in India, fighting indiscriminate tree cutting.

Q5: What is rain water harvesting?
Ans: Rainwater collection is the process of collecting rainwater directly from the sky and storing it for later use or recharging groundwater.

Q6: Define a resource.
Ans: resource is a source of supply that is kept in reserve in order to be converted into something more valuable and helpful.

Q7: What were the two main problems as a result of Tawa Irrigation Project?
Ans: Water logging and increasing salinity were the two main problems as a result of the Tawa Irrigation Project.

Q8: Mention one major effect due to deforestation?
Ans: Soil erosion one major effect due to deforestation.

Q9: Name two fossil fuels.
Ans: Coal and petroleum are two fossil fuels.

Q10: Which programme was started to replenish forests?
Ans: Silviculture was the programme which was started to replenish forest.

Q11: What does the high level of total coli form count in river Ganga indicates?
Ans: It indicates that water is contaminated by disease causing microorganisms.

Q12: Which canal has brought greenery to considerable areas of Rajasthan?
Ans: Indira Gandhi Canal brought greenery to considerable areas of Rajasthan.