Question

Jitne aate h utne btado..​

Answer 1

Answer:

reduce recycle reuse answer number 5

iron magnesium calcium answer number 7

answer number 8 ferrous rust non ferrous not rust

Answer 2

Answer:

• The 3Rs

1. Reuse
2. Reduce
3. Recycle

• We need power resources for industry, agriculture, transport, communication, and defence. Therefore, we must understand the importance of these resources and conserve them. Power resources are of two types:

1. Conventional Resources: are those that have been in common use for a long time. Firewood and fossil fuels are two main conventional energy sources.
2. Non-conventional Resources: of energy are renewable. Solar energy, wind energy, tidal energy, etc. are non-conventional sources of energy.

• Minerals are used in many industries. Minerals which are used for gems are usually hard. These are then set in various styles for jewellery. Copper is another metal used in everything from coins to pipes. Silicon, used in the computer industry is obtained from quartz. Aluminum obtained from its ore bauxite is used in automobiles and airplanes, bottling industry, buildings and even in kitchen cookware.
• Ferrous minerals and Non Ferrous minerals

1. The term "ferrous" is usually applied only to metals and alloys. The adjective ferruginous is used instead to refer to non-metallic substances that contain iron, such as "ferruginous water"; or to an orangish-brown color resembling that of rust.
2. When a metal is defined as non-ferrous it means that it does not have a significant amount of iron in its chemical composition.

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