In 1939 Hitler was becoming more and more aggressive with his foreign policies and decided to invade Czechoslovakia. The entire European continent was worry that war could soon be in their door steps.
The British and French fearing the worst of Germany´s actions agreed to support Poland in case that Germany decided to also invade them.
Unfortunately, this was not of any concern to Hitler, and his Nazi Germany continue with the aggression and on September 1st 1939, attacked Poland which was overwhelmed by the Nazi war machine.
After this war like action, the British and French had no more options but give Hitler an ultimatum, to withdraw his forces from the newly occupied Poland. this of course have not effect on Germany and both British and French officially declared war on Hitler and his Nazi Germany.
Answer:
D. (A volcanic) eruption created an island in the sea near Japan.
Explanation:
D is the answer because it is the only answer choice that tells the reader how the island was created. The question asks for a sentence that tells you how the island was created. The other sentences only talk about the length of the island or the distance of the island from other islands in Japan. Therefore D is the answer because it tells you that the island was created by a volcanic eruption.
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Plastic is a word that originally meant “pliable and easily shaped.” It only recently became a name for a category of materials called polymers. The word polymer means “of many parts,” and polymers are made of long chains of molecules. Polymers abound in nature. Cellulose, the material that makes up the cell walls of plants, is a very common natural polymer.
Over the last century and a half humans have learned how to make synthetic polymers, sometimes using natural substances like cellulose, but more often using the plentiful carbon atoms provided by petroleum and other fossil fuels. Synthetic polymers are made up of long chains of atoms, arranged in repeating units, often much longer than those found in nature. It is the length of these chains, and the patterns in which they are arrayed, that make polymers strong, lightweight, and flexible. In other words, it’s what makes them so plastic.
These properties make synthetic polymers exceptionally useful, and since we learned how to create and manipulate them, polymers have become an essential part of our lives. Especially over the last 50 years plastics have saturated our world and changed the way that we live.
The First Synthetic Plastic
The first synthetic polymer was invented in 1869 by John Wesley Hyatt, who was inspired by a New York firm’s offer of $10,000 for anyone who could provide a substitute for ivory. The growing popularity of billiards had put a strain on the supply of natural ivory, obtained through the slaughter of wild elephants. By treating cellulose, derived from cotton fiber, with camphor, Hyatt discovered a plastic that could be crafted into a variety of shapes and made to imitate natural substances like tortoiseshell, horn, linen, and ivory.
This discovery was revolutionary. For the first time human manufacturing was not constrained by the limits of nature. Nature only supplied so much wood, metal, stone, bone, tusk, and horn. But now humans could create new materials. This development helped not only people but also the environment. Advertisements praised celluloid as the savior of the elephant and the tortoise. Plastics could protect the natural world from the destructive forces of human need.
The creation of new materials also helped free people from the social and economic constraints imposed by the scarcity of natural resources. Inexpensive celluloid made material wealth more widespread and obtainable.
Answer:
The Paleolithic people were skillful hunters and developed sharp weapons made of stone for hunting purpose. They had a knowledge of art and infrastructure which was evident from the discovery of metal tools, jewellery like bracelets made of shells, bones and ivory. They even did paintings on the rocks and body art.
Explanation:
