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When the entire lake reaches 40 F, the surface water cools further, dropping below 40 F. Because this water is now less dense than the surrounding water, it will stay on the top and continue to cool. Once the surface water falls to 32 F, it freezes. The freezing then spreads downward into the lake and the ice thickens
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Field Music are a Mercury Prizenominated[1] English rock band from Sunderland, Tyne and Wear, England, that formed in 2004, particularly active in the Wearside region.[2] The band's core consists of brothers David Brewisand Peter Brewis, with Andrew Moore occasionally featured as keyboardist. Their line-up has at times featured members of both Maxïmo Park and The Futureheads.
The drawbacks of the open-field system are as follows.
(1) Under utilisation of land due to remaining idle.
(2) Farmers slaughtered their animals in autumn and used to salt their meat for consumption in winter as there used to be no hay during the colder season.
(3) The farming land of families and individuals lay scattered all around. Hence, reaching a field took much time and was tedious.
(4) Paths and cart tracks led to land wastage significantly.
(5) After ploughing a field keeping them idle was a wastage of labour, resources and time.
(6) Diseases were rampant due to the common grazing ground of livestock.
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Clay can be found everywhere in the world
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More efficient use of agricultural land can boost crop yields and meet growing global demand for food. Smallholders have a vital role to play, both because they produce much of the world's food and because they represent a large share of the world's poor and food insecure.
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D. magnetic polarity reversals
Explanation:
The marine magnetic anomalies are the result of two things; the seafloor spreading at the mid-ocean ridges and the magnetic polarity reversals.
The mid-ocean ridges are the places where the new crust forms. This places also have big influence on the magnetic anomalies, with the reason being that the magnetism has higher influence in this parts.
Also, the magnetic polarity reversals play a big role. The Earth has not always had the same magnetic polarity, and multiple times throughout its past the North and South Poles have been switching places when it comes to the magnetism.
The igneous rocks on the ocean floor have proof in them about this, as the metallic components are reacting to the magnetism and face toward the stronger magnetic field.
