World Agriculture, Minerals And Industries MCQ Question and Answer | Geography MCQ Question

Summers in Western Europe are warmer than those in Eastern Europe because of the influence of the warm ocean current.

A type of rainfall which occurs when wind rises up along a hill or mountain barrier is called Orographic. Orographic rainfall is rain that is produced from the lifting of moist air over a mountain. Orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range.

Sumatra islands receives convectional rainfall. When the land warms up, it heats the air above it. This causes the air to expand and rise. As the air rises it cools and condenses. If this process continues then rain will fall.

Hydration and Hydrolysis represents the process of chemical weathering. In Hydration, Chemical combination of water molecules with a particular substance or mineral leading to a change in structure. In Hydrolysis, Most important process in chemical weathering. It is due to the dissociation of H₂O into H+ and OH- ions which chemically combine with minerals and bring about changes, such as exchange, decomposition of crystalline structure and formation of new compounds. Water acts as a weak acid on silicate minerals.

'Climate is extreme, rainfall is scanty and the people used to be nomadic hoarders'. For Central Asian Steppes the statement is correct.

Exfoliation is not a process of chemical weathering. Exfoliation can occur due to several processes. During a combination of physical and chemical weathering, exfoliation may occur parallel to a rock's outer surface due to a combination of chemical breakdown of minerals , especially in the presence of water.

An island

Instrument for measuring rainfall is called Hyetometer (A rain gauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over a set period of time).

Option 1 is incorrect. Rainfall generally decreases away from the equatorial region both northwards and southwards upto about 30° north and south.

Convectional types of rainfall is often accompanied with lightning and thunder. Convectional rain is caused by convection where the surface layer of the atmosphere is heated causing the moisture laden air to rise. As it rises it cools to form clouds. The unequal heating of the earth's surface causes convection.