redshift and doppler effect
redshift is an increase in the wavelength of radiation emitted by a receding celestial object as a consequence of the Doppler effect and the Doppler effect is a tool used to measure frequency changes as light travels to, from, or pass an observer
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Environmental factors that influence the extent of crop agriculture are terrain, climate, soil properties, and soil water. It is the combination of these four factors that allow specific crops to be grown in certain areas.
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The two major issues that lower the standard of living in North Africa is that North Africans have been living in poverty due to water shortages and urban problems such as overcrowding are serious issues. Other than that, the standard of living in North Africa is generally higher than than other parts of Africa
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1. The Farmers and the Slaves are at the lowest or bottom of Social Heriarchy, because they are poor, without riches but they worked for the Paraoh or clean the city. They are the lowest because of their low status in life.
2.Miguel Hidalgo y Costilla led the rebellion.
3.The Mexican Revolution, which began in 1910, ended dictatorship in Mexico and established a constitutional republic. A number of groups, led by revolutionaries including Francisco Madero, Pascual Orozco, Pancho Villa and Emiliano Zapata, participated in the long and costly conflict.
