Which characteristic of magma mainly determines its explosiveness?

 Mt.Pinatubo slept for almost 600 years and erupted last 1991. What type of volcanois Mt. Pinatubo?

Compositeor stratovolcano usually have ____ eruptions.

Which of the following characteristics of a volcano depends on its magmaemission?

Which best explains why viscosity of magma decreases with temperature?

Which of the following is NOT a factorthat determines if a volcano erupts violently or quietly?

Active volcanoes are most likely to be found__________.

Which of the following is NOT a sign of volcanic eruption?

A thick layer of volcanic ash can beheavy enough to collapse the roofs of buildings because ash ____________________.

Geothermal energy is a clean and renewable source of energy that can be used by harnessingheated     water from within the Earthand converting it to steam so that it can move turbines and generate __________.

Which energy flow will describe the correct pathway of producing geothermal energy?

The following are the advantages of using Geothermal energy except

It refers to the atmospheric condition of a place over a long period of time.

Why do places near the equator have higher temperature?

Why do places at the same latitude but different altitudes have different climates?

Which side of the mountain often receives the most precipitation?

How ocean surface and circulation directly affect the pattern of climate around theworld?

During summer, many people visit Baguio because of the cold weather. What makes Baguiocold?

Which of the following is an indication of global warming?

Which condition happens during the La Niña phenomenon?

Which is the best practice to reduce the effect of climate change?

Stars can be found in large groups throughout the universe. What are these groupscalled?

How do stars appear to move in the night sky?  

Stars appear to move in the sky because

Whydo stars have colors?

Why can we see different parts of the sky at different times of the year?