Answer:
The earlier existing organisms including both flora and fauna, that were buried millions of years back, were converted into fossils and these fossil fuels are some of its forms.
The use of fossil fuels has extensively increased over the last few decades. This increasing consumption of fossil fuels has a negative effect as it releases a large amount of carbon into the atmosphere.
The cutting of trees also affects the atmosphere, because in the absence of trees, the CO₂ will not be absorbed by the plants and there will be less amount of O₂ as well. This will lead to an increasing amount of carbon into the atmosphere.
This carbon content when increases in its amount and rapid deforestation can lead to the following consequences-
- Increasing the amount of Carbon in the atmosphere will lead to an increase in the global surface temperature of the earth. This would lead to the melting of the ice in the colder regions and higher latitudes, thereby rising the sea level.
- Deforestation will lead to a high rate of wind erosion, where the soil will be dry, lacking in the moisture content, and wind will carry away its valuable minerals. Rapid surface runoff or flooding also will result. It will result in the loss of soil fertility.
- It will be difficult for organisms to survive in such a hot and harsh condition.
Rise in temperatures, melting in the Arctic and extinction
Answer:
d. meander scar
Explanation:
Meander scar is the name given to a stream that flows from a floodplain of a larger river. As it flows, it is possible to see this stream swaying tirelessly in all directions giving rise to a series of sinuous and regular curves, creating a watercourse. The meander scar can also originate from a floodplain that changes its channel within a valley.
Answer:
The correct answer is D. 4,2,3,1
Explanation:
Shale is metamorphosed into three rock types( phyllite, schist and gneissic) a dull slate with cleavage, a rock with small mica crystals with a shiny aspect, a very shiny rock with large mica crystals and a banded gneissic rock.
Shales that are subject to heat and pressure of metamorphism alter into a hard, fissile, metamorphic rock known as slate. When metamorphic grade is continually increased the sequence is phyllite, then schist and finally gneiss.
Answer:
undernourishment means; "not given the essential elements for proper development."
desertification means; "the process of which a certain area becomes a desert."
food security means; "the state of having reliable access to a sufficient quantity of affordable, nutritious food."
and all of those go into where Sahel is because it is a poor, undernourished, deserted area.
Explanation: