Homo ergaster may have been the first human species to leave Africa and fossil remains show this species had expanded its range into southern Eurasia by 1.75 million years ago. Their descendents, Homo erectus, then spread eastward and were established in South East Asia by at least 1.6 million years ago.Oct 30, 2015
Answer: Tibet and Hong Kong are currently
under Chinese control.
Explanation: Read from article.
<u>Answer:</u>
Alluvial fans are evidence that the Death Valley is a tectonically active region.
<u>Explanation:</u>
- Alluvial fans can be only formed by the slow and gradual depositional action of a river.
- But for an alluvial to be formed, it is primarily necessary for the river to continuously carry and deposit sediments for a long period of time.
- The supply of sediments done by the Death Valley in California provides evidence that it is a tectonically active region.
Answer:
Explanation:
Acid rain is a kind of rain or precipitation that contains high concentration of harmful acidic pollutants mainly nitrogen oxide and the sulfur dioxide which is released into the atmosphere that reach the earth's surface. It is caused by burning of fossil fuels and other industrial wastes released into the atmosphere that reach with rain and turns the precipitation acidic . The marbles of Taj Mahal is also getting adversely affected due to acid rain.
Acid rain is associated with the Part of USA and Canada for two reasons -natural causes such as volcanic eruption,wildfires and lightning:man made causes such as coal plants and Air pollution from automobiles . An average pH of 4-5.is usually found there (5.6 is normal for atmosphere) .
I would say it would b D. Irish moving to America during the Potato Famine, as it wasn't necessarily forced, but they went of their own free will
