In 1929, the great depression began in the united states, caused mainly by the stock market crash. what was a major cause of the stock market crash?

According to the historians, what triggered the fall of the stock market were these nine factors interacting with each other under debt conditions (Obligation that a person has to pay or return a thing, usually money), and deflation (Situation of excess supply that can cause a generalized decrease in prices or an economic recession), to create the mechanics of boom and bust.

The chain of events proceeded as shown below:

1.- Liquidation of debt and forced sales.

2.- Reduction in the money supply because the bank debts were liquidated.

3.- A fall in asset price levels.

4.- An even greater fall in the total value of companies, precipitating bankruptcies.

5.- A fall in profits.

6.- A reduction in production, trade and employment.

7.- Pessimism and loss of confidence.

8.- Accumulation of money.

9.- A fall in nominal interest rates and a rise in interest rates adjusted for deflation.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals