Convection in the mantle and pressure of magma on the edge of the plate
Explanation:
Convection currents occur in the mantle because the upper mantle (asthenosphere) is generally cooler than the lower mantle. The convections apply upward pressure on the lower edges on the lithosphere as the melted rocks upwell from below. The lithosphere deflects the convections and as the convections churn clockwise of anticlockwise, they drag the lithosphere with it via friction. This is what is stipulated to cause tectonic plate movements.
Learn More:
For more on tectonic plate movement check out;
brainly.com/question/3296749
brainly.com/question/12253664
#LearnWithBrainly
Answer:
7.798
Explanation:
It is understood that as at 31 December 2018, there had been 150 tornado event days with 1169 total tornado reports for 2018.
Then the average will be a calculated as:
1169/150= 7.79. This is regarded as the average amount of tornado experienced in the days it took place.
We can then infer and say that on average, each tornado event day had about 7.79 tornadoes reported.
Physical weathering brakes it down while keeping the same substance.