VOLCANO

Which characteristics of magma mainly determines its explosiveness?

• color

• amount

• temperature

• silica content

Which of the following characteristics of a volcano depends on its magma emission?

• age

• size

• shape

• location

Which of the following factors associated with huge volcanic eruptions may cause the decrease in the Earth's average temperature for a few years?

• heat

• light

• acid rain

• volcanic ash

A thick layer of volcanic ash can be heavy enough to collapse the roofs of buildings because ash _________________.

• is solid

• cannot be blown by winds

• becomes heavier as it cools

• consists of tiny fragments of rocks that becomes heavy as they pile up

Which of the following is an active volcano in the Philippines?

• Apo in Davao

• Bud Datu in Sulu

• Isarog in Camarines Sur

• Kanlaon in Negros Oriental