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Oduvanchick [21]
3 years ago
10

Which of the following are the two primary gasses found in the Earth's atmosphere? nitrogen and oxygen nitrogen and carbon hydro

gen and carbon carbon and helium
Geography
1 answer:
Zanzabum3 years ago
7 0
Nitrogen and oxygen are the main constituents of the atmosphere plus water vapour near the surface. Carbon dioxide is present in smaller amounts butgl of course it can have a profound influence on the climate as global warming has shown, Greenhouse gases include water vapour, carbon dioxide, methane and nitrous oxide. 

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A parent rock goes through metamorphism. The resulting metamorphic rock is nonfoliated, contains intergrown mineral crystals, an
Talja [164]

Answer:

Parent rock - Limestone

Metamorphic rock - Marble

Explanation: Marble is a metamorphic rock formed from when Limestone undergoes metamorphism, which occurs when they are subjected to high temperature and pressure. They contain calcite and minerals such as Mica, quartz and intergrowth of mineral crystal. They also react with hydrochloric acid. They do not have foliation. Marbles are generally used for sculpting and construction materials. They have an hardness of about 3 on the Mohr scale and feels gritty to touch

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3 years ago
At what temperature did water freeze on Earth 1 billion years ago?
pantera1 [17]
Freezing point of the water is innate property. Therefore, I would say that the freezing point of water from 1 billion years ago would still be the same as to what temperature the water would freeze today. Thus, I choose letter D. 0°C. 
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3 years ago
Think about the areas of Europe and Russia that are the most densely populated. What physical features attract people to settle
NISA [10]

Answer:

Big cities, convenience.

Explanation:

In the most densely populated areas of Europe and Russia, there are cities which means that things will be close to people. Cities provide convenient for people, they are more populated.

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3 years ago
The Himalayas in South Asia or an example of what type of plate boundary
aksik [14]
<span>its is between the eurasian plate and the Indian plate that formed the himalayas</span>
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tatuchka [14]

Answer:

The problem of land degradation

PRESSURES ON THE REGION'S AGRICULTURAL LAND ARE LEADING TO EXTENSIVE LAND DEGRADATION. THE CAUSES ARE POVERTY, LAND SHORTAGE AND INCREASING POPULATIONS

In 1992 developing countries in Asia and the Pacific accounted for just less than 54 percent of the world population - nearly 3000 million people. Yet these countries had only 17 percent of the world's land resources.

Even so, countries in Asia and the Pacific are relatively well fed compared, for example, to much of Africa and parts of Central and South America. This is because they have made profitable use of new agricultural technology, such as fertilizers, high-yielding crop varieties, mechanization and irrigation. During the period ]961-85, 93 percent of the region's increase in cereal production was due to increased production inputs. As a result food production has more than kept pace with population increase.

While agricultural productivity has risen dramatically, the cost in land degradation has been high. Large areas of the region's cropland, grassland, woodland and forest are now seriously degraded. Water and wind erosion are the major problems but salinity, sodicity and alkalinity are also widespread; water tables have been over-exploited; soil fertility has been reduced; and where mangrove forest has been cleared for aquaculture or urban expansion, coastal erosion has been a common result. Finally, urban expansion has become a major form of land degradation, removing large areas of the best agricultural land from production.

The effect of these forms of land degradation on cereal production has so far been masked by the increasing levels of agricultural inputs that are used. However, production of other crops, such as pulses, roots and tubers, has now begun to decline. It is no coincidence that these crops arc grown on land with low production potential, where rates of land

Explanation:

8 0
3 years ago
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