Lava and other materials that are launched from a volcano into the air are referred to as tephra. The correct option among all the options given in the question is option "A".Tephra is actually the material that is ejected by an active
volcano irrespective of the type of the material, fragment size or emplacement
mechanism. The airborne substances of the volcanoes are known by the name
pyroclasts. The pyroclasts remain as tephra unless they become hot enough to
fuse together.
England increased taxes in the colonies to help pay for the debt that resulted from the French-Indian war. They raise taxes to rebuild their economy. They wanted to deter any trading by smugglers outside their designated ports of entry which allowed them to control colonial trade.
Answer:
stratopause—the boundary between the mesophere and the stratosphere.
Explanation:
Answer:
The answer is A
Explanation:
Seafloor spreading causes continental plates such as the North American Plate and the Eurasian plate to move apart in the mid-Atlantic ridge. However, the movement of the plate can cause the plates to move towards others. Eventually, when the continental plates move together they form supercontinents. The convection currents in the mantle are the driving force under the tectonic plates.