REVIEWER Q3

Why do mountain climbers bring thick jackets when they go up the mountain?

• A. The temperature increases as the altitude increases

• B. The temperature decreases as the altitude increases

• C. The temperature remains the same as the altitude increases

• D. The temperature decreases as the altitude decreases

Why do stars appear to move?

• A. Because the wind is blowing

• B. Because they are so far away

• C. Because of Earth's rotation

• D. Because of Newton's Law of gravity.

How is a volcano formed?

• A. When there is a change in the landform, a volcano is formed

• B. Hotspots between mantle and crust causes melting of rocks thus resulting to volcanic activity

• C. There are divergent boundaries where plates collide leading to subduction and generating magma

• D. Convergent boundaries create gaps between plates allowing the rise of the magma

How will you classify the volcanoes with records of eruption within 10,000 years?

• A. Inactive volcanoes

• B. Active volcanoes

• C. Dormant volcanoes

• D. Young volcanoes

How can we generate electricity from a renewable source like geothermal energy?

• A. By converting water into steam

• B. By connecting generators to hot fluids

• C. By digging deep to the earth to get tons of magma and absorb heat through compression

• D. By harnessing heated water from within the Earth and converting it to steam so that it can move turbines

Which color stars have the highest surface temperature?

• A. Red

• B. Orange

• C. Yellow

• D. Blue

Mt. Pinatubo has been well-known for its eruption in 1992. How can we describe its Plinian eruption?

• A. Ash columns and steam can be observed from its eruption

• B. Calm eruption of flowy lava along neighboring areas

• C. Excessively explosive eruption of pyroclastic materials reaching more than 20km high

• D. Violent fountain-like eruption

If you are located at the North Pole, where will you see the Polaris?

• A. Overhead

• B. Just above the horizon

• C. Around 45° from the horizon

• D. Polaris will not be seen in the North Pole

How can you expect the volcanic eruption to be a lava frothing over the crater?

• A. When magma is thin and has high amount of dissolved gases

• B. When magma is thick and has less amount of dissolved gases

• C. When magma is thick and has high amount of dissolved gases

• D. When magma is thin and sticky has less amount of dissolved gases

If there are warnings of imminent volcanic eruption, how should the people prepare for it?

• A. Carry necessities and evacuate immediately

• B. Secure the pets inside your home

• C. Stay indoors and wear proper masks

• D. Wait for further announcement from LGUs or news