Question

geologists consider the possibility of a volcanic eruption stronger than any that have occurred in recorded history. what effect could such an eruption have on systems on earth? choose the correct answer.

harmful levels of uranium dust would spew from the volcano and spread globally through the atmosphere. radioactive precipitation would lead to significant numbers of plant and animal mutations.

ash and sulfuric gas from the volcano would move globally through the atmosphere, blocking sunlight and lowering temperatures. the increase in snowfall would further reflect sunlight and cool temperatures.

the volcanic blast would induce powerful earthquakes throughout the world. cities would be devastated, and tremors would continue at dangerous levels for several years.

tectonic plates near the eruption would experience a jolt strong enough to significantly increase their rate of movement. huge ocean waves would form and wipe out ecosystems.

Explanation:

Volcanic eruptions release ash, sulfuric gas, etc. Ash can block sunlight. Sulfuric gas can form aerosols. These aerosols and ash can move globally. Blocking sunlight lowers temperatures. Also, volcanic eruptions don't release uranium dust in significant amounts like option 1. Volcanic blasts don't directly cause powerful earthquakes worldwide for years as in option 3. Tectonic plate movement increase due to a volcanic eruption (as in option 4) is not a typical major global - scale effect compared to the atmospheric and temperature - related effects.

Answer:

Ash and sulfuric gas from the volcano would move globally through the atmosphere, blocking sunlight and lowering temperatures. The increase in snowfall would further reflect sunlight and cool temperatures.