For much of the last quarter century, the leading theory of the driving force behind tectonic plate motions envisaged large scale convection currents in the upper mantle, which can be transmitted through the asthenosphere.
Answer:
B) Extremely cold climate conditions made it difficult to live in the region
Explanation: In places where there are countless mountain ranges, there is bound to be isolation to the point where the people that already reside there would develop their own language, culture, and mannerisms. Northern Europe is filled with mountains and cold climate. Many people from other regions in Europe would have a hard time adjusting to the harsh conditions like the natives.
Answer:
The 1956 Suez Crisis, when Britain along with France and Israel invaded Egypt to recover control of the Suez Canal, was arguably one of the most significant episodes in post-1945 British history. Its outcome highlighted Britain's declining status and confirmed it as a 'second tier' world power.
Explanation:
<em>HOPE</em><em> </em><em>IT'S USEFUL</em><em> </em>
<em>CUTIEPIESRI</em><em>✌
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There are a few different answers to this question, depending on what you are asking. I'll go over the main ones.
1. The Earth's axis is tilted in comparison to the Sun, so days get shorter in the winter months. This is due to less light, and therefore energy, hitting the Earth directly. Instead, that energy either misses entirely, or hits nearer to the Equator. This is why the poles have twenty-four hour days and nights depending on the season. (Night in the winter, day in the summer.)
2. In terms of the food chain, energy from the sun is converted to basic sugars by plants in a process known as photosynthesis, inside the plant's cloroplasts. Small animals such as mice and insects consume the plants, and the energy those plants converted from sunlight. This continues up the food chain until you get to apex-predators (tigers, bears, wolves, owls, etcetera).
3. In terms of electricity, solar panels are made of tons of 'solar cells' which tend to be lots of silicon atoms, which like to share electrons, and a conductive backing. (Pardon me if some of this section is incorrect, I only have a basic understanding of solar panels) When a photon (that is, a light particle) hits the silicon, it bumps off an electron, and the conductive backing catches it, resulting in a electrical current. This current is incredibly small per solar cell, so you need a ton of them to make any sort of useful power out of them. Solar panels do degrade over time, but incredibly slowly, there are some from the 1970's that still generate just as much power as they did originally (if not, only ever so slightly less).
I hope I answered what you needed to know! If you wanted a different answer, feel free to comment with some clarification and I would love to fill you in :)
