Answer:
Magmas are mainly liquid and contain dissolved fluids such as water, most are less dense than the adjacent solid rock and so move upward.
Explanation:
Magma -
It is a semi solid particle and the igneous rocks are formed from magma .
Magma is basically found inside the surface of the Earth and may come out from Volcanoes , due to any tectonic movements .
The composition of magma is basically molten form of rock along with gas bubbles and some crystals .
The magma is very dense in nature and slightly viscous and hence can flow , being semi - solid in nature .
Answer:
Iceland celebrates the first day of summer as an annual public holiday in April.
A) fresh water: fresh water means it is water that is fresh and it doesn't come from the sea or isn't polluted.
B) groundwater: it is presented beneath Earth's surface in soil pore spaces and in the fractures of rock formations
C) aquifer: it is a underground layer of water-bearing permeable rock.
D)irrigate: it is supply water to help land or crop grow.
E) physical water scarcity: it occurs when and where there is not enough water to meet both human demands and those of ecosystems to function effectively.
F) economic water scarcity: it is caused by a lack of investment in water or infrastructure of insufficient human capacity to satisfy the demand of water in areas.
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Answer:
c
Explanation:
because
The primary environmental disaster in the Canadian Shield is deforestation. Since the Shield is engulfed with immense forests, it enchants many industries dealing with timber. Due to the high number of trees, the rate of cutting them down is high for making furniture, paper, and many others.
Air pollution problems such as smog and acid rain result from the presence of, and interactions among, various air pollutants released to the atmosphere through natural processes and human activities. Natural sources of air pollution include forest fires, volcanoes and emissions of volatile organic compounds <span> from vegetation. Human sources of air pollution include activities that rely on carbon-based fuels, for example, </span>transportation<span>, </span>electric utilities<span>, industrial processes such as </span>oil and gas production, as well as certain products, such as paints and solvents. Deforestation carried out to create dry lands is one of the major concerns. Land that is once converted into a dry or barren land, can never be made fertile again, whatever the magnitude of measures to redeem it are. Land conversion, meaning the alteration or modification of the original properties of the land to make it use-worthy for a specific purpose is another major cause. This hampers the land immensely. Also there is a constant waste of land. Unused available land over the years turns barren; this land then cannot be used.<span>Agriculture disrupts all freshwater systems hugely from their pristine states</span>
