T/F- 1. When all parts of the Milankovitch cycle align, the planet is receiving
ID: 105151 • Letter: T
Question
T/F- 1. When all parts of the Milankovitch cycle align, the planet is receiving the most solar radiation.
2. Immediately beneath the surface is the aerated zone, in which pore spaces contain some water and air.
3. Floodplains result from the deposition of coarse sediment as a bed load overflows the banks of a stream.
4. Because sea level doesn't act like base level with glaciers, a glacier can erode its bed below sea level.
5. Because sea level doesn't act like base level, with glaciers, a glacier can erode it's bed flow sea level. state true or false. if flase state why
Explanation / Answer
1.True
The earth is known to orbit the sun, it has been stated that the major climatic variations are result of the cyclical changes in the earth's orbital movement. This was first propounded by Milutin Milancovic and hence called Milancovitch cycle. This cyclic variations in earth orbital is called natural global warming and suggested to be the reason for past glaciations. The factors of Milancovitch which are responsible for highest and lowest summer temperature at poles are- axial tilt, earth eccentricity and precession in the earth's orbital.
2.True
Aeration zone: This is the zone present immediately below the land surface where the pores contain both water and air, but are not totally saturated with water. Also known as the unsaturated zone.
3. False
Flood plains are made by a meander eroding sideways as it travels downstream, When a river breaks its banks and floods, it leaves behind layers of alluvium (silt). These gradually build up to create the floor of the flood plain. Floodplains generally contain unconsolidated sediments, often extending below the bed of the stream. These are accumulations of sand, gravel, loam, silt, and/or clay, and are often important aquifers, the water drawn from them being pre-filtered compared to the water in the river.
4. true
5.
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