VOLCANOES

Which characteristic of magma mainly determines its explosiveness?

• color

• viscosity

• temperature

• silica content

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

• age

• size

• shape

• location

Which of the following fcators 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 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

• Isaraog in Camrines Sur

• Kanlaon in Negros Oriental