When a volcano erupts, the molten rock (or magma) that comes out of the Earth is called lava. Because lava is so hot (more than 1,100 degrees C, over 2,000 degrees F), it remains molten and flows across the ground until it cools and hardens into rock.
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1-choose any two points on the line.
2-draw a right-angled triangle with the line as hypotenuse.
3-use the scale on each axis to find the triangle's: vertical length.horizontal length.
4-work out the vertical length ÷ horizontal length.
5-the result is the gradient of the line.
One way is that the sun is heating up the world causing droughts and causing the water level to rise to cause floods
They are all elevated land forms.
<span>Case study: Boxing Day Tsunami, 2004. On 26 December 2004 a tsunami occurred in the Indian Ocean. It was the result of the Indio-Australian Platesubducting below the Eurasian Plate. It was caused by an earthquake measuring more than magnitude 9.</span>