Flooding occurs when the amount of water exceeds the capacity of the land or the rainfall. The correct option is B.
This can happen due to several reasons, such as heavy rainfall, melting snow, or a high tide. When the capacity of the river’s channel is exceeded, the excess water overflows the river’s banks and spills out across the flood plain. Prolonged rainfall can also lead to flooding, as the water will saturate the ground and begin to pool in low-lying areas.
In addition, flash floods can occur when a heavy rainstorm or thunderstorm happens in a very short period of time, making it difficult for the ground to absorb the water. In any case, when flooding occurs, it can result in significant damage to property, infrastructure, and the environment, making it important to take precautions to prevent flooding where possible. The correct option is B.
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The Aleutian and Hawaiian Islands form from completely different processes related to Plate Tectonics. Using Plate Tectonic theory and correct technical terms, explain how they form.
The Aleutian and Hawaiian Islands form from two different processes related to Plate Tectonics. The Aleutian Islands are formed by the subduction of the Pacific plate beneath the North American plate at the Aleutian Trench. This process is also known as a convergent plate boundary.
During subduction, the oceanic lithosphere is consumed and in the process magma is produced and rises to the surface. This magma then cools and hardens to form the Aleutian Islands.
The Hawaiian Islands are formed by a process known as hotspot volcanism. Hotspots are stationary mantle plumes that rise from the mantle and melt the lithosphere.
This process is also known as a divergent plate boundary. The Hawaiian hotspot is located beneath the Pacific plate and has created the Hawaiian Ridge of islands, as the Pacific plate has moved over it.
The molten material erupts to the surface to create new volcanoes and as the older volcanoes move away from the hotspot, they become inactive and form islands.
Both processes create volcanic islands, but the way in which the volcanoes form differs between the Aleutian and Hawaiian Islands. The Aleutian Islands are formed through subduction while the Hawaiian Islands are formed through hotspot volcanism.
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What are gases that accumulate in the atmosphere and contribute to global warming?
The gases that accumulate in the atmosphere and contribute to global warming are known as greenhouse gases. They trap heat from the sun and cause the Earth's temperature to increase.
What is global warming?Global warming refers to the phenomenon of Earth's average surface temperature increasing due to human activities that increase the concentration of greenhouse gases in the atmosphere. Greenhouse gases such as carbon dioxide, methane, and water vapor trap heat in the Earth's atmosphere, causing global temperatures to rise. This is referred to as the greenhouse effect.
What is the greenhouse effect?The greenhouse effect is a natural process that occurs when certain gases in the Earth's atmosphere, referred to as greenhouse gases, trap heat from the sun, preventing it from escaping into space. As a result, the Earth's temperature is kept within a range that is conducive to life as we know it.
However, human activities such as burning fossil fuels, deforestation, and industrial processes have led to an increase in the concentration of greenhouse gases in the atmosphere, intensifying the greenhouse effect and causing global warming. This is a significant concern, as global warming can have a range of negative impacts on the environment and human societies.
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