Answer:
The three sand are similar in composition, since all are formed 90% by quartz. They are also similar in roundness, as they all have large particles that allow a very sandy soil with low water retention.
Explanation:
The desert area of the river and the beach have a very similar composition, since 90% of these sands are composed of quartz. however, the similarity does not mean that these sands are the same, as they are not, since the sands of the beach and the river may have a little more material, such as animal remains, making these sands also have carbon in composition, something that desert sand has in less quantity.
In addition, both sands have large particles that promote strong aeration in the soil, but a very rapid loss of organic matter.
Answer:
Explanation:
There are two dominant theories:
The inside-out model proposes that the Earth formed with trace amounts of water structurally bonded to the minerals in the mantle. This water makes its way to the Earth’s surface through volcanic processes.
The outside-in model proposes that the Earth formed without water, which came with other volatiles from the meteorites or comets that bombarded the young planet. This water was probably mixed into the upper layers of the Earth and was later brought to the surface through volcanism.
Answer:
only nonliving things like rocks and boulders. The geosphere is basically the earth itself (ie rocks, minerals, landforms, mountains).
Explanation:
Coal seams are formed from dead and decaying organic matter. Generally, this matter came from ancient peat bogs that died and fell into shallow, stagnant waters. As this material decayed, it became peat over time. As this peat was buried under sediment, the temperature increased and the pressure became greater.
Coal seams originate and are formed by the consolidation of biota, minerals, and natural chemicals through geologic time. Compression, heat, sedimentation, erosion, and chemical energy are agents of the coal formation process.
Apartheid (“apartness” in the language of Afrikaans) was a system of legislation that upheld segregationist policies against non-white citizens of South Africa. After the National Party gained power in South Africa in 1948, its all-white government immediately began enforcing existing policies of racial segregation. Under apartheid, nonwhite South Africans (a majority of the population) would be forced to live in separate areas from whites and use separate public facilities. Contact between the two groups would be limited. Despite strong and consistent opposition to apartheid within and outside of South Africa, its laws remained in effect for the better part of 50 years. In 1991, the government of President F.W. de Klerk began to repeal most of the legislation that provided the basis for apartheid. President de Klerk and activist Nelson Mandela would later win the Nobel Peace Prize for their work creating a new constitution for South Africa.
Who Started Apartheid in South Africa?
Racial segregation and white supremacy had become central aspects of South African policy long before apartheid began. The controversial 1913 Land Act, passed three years after South Africa gained its independence, marked the beginning of territorial segregation by forcing black Africans to live in reserves and making it illegal for them to work as sharecroppers. Opponents of the Land Act formed the South African National Native Congress, which would become the African National Congress (ANC).
Did you know? ANC leader Nelson Mandela, released from prison in February 1990, worked closely with President F.W. de Klerk's government to draw up a new constitution for South Africa. After both sides made concessions, they reached agreement in 1993, and would share the Nobel Peace Prize that year for their efforts.
The Great Depression and World War II brought increasing economic woes to South Africa, and convinced the government to strengthen its policies of racial segregation. In 1948, the Afrikaner National Party won the general election under the slogan “apartheid” (literally “apartness”). Their goal was not only to separate South Africa’s white minority from its non-white majority, but also to separate non-whites from each other, and to divide black South Africans along tribal lines in order to decrease their political power.
