Grade 9 reviewER THIRD QUARTER EARTH SCIENCE

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1. Which of the following is an active volcano in the Philippines? Apo in Davao C.Isarong in Camarines Sur Bud Datu in Sulu D. Kanlaon in Negros Oriental

2. Ana is asked to give examples of inactive volcanoes. Which should she not mention? Taal Iraya Tamburok Kanlaon

3. Which of the following characteristics of a volcano depends on its magma emission? Age Size Shape Silica Content

4. What determines the nature of eruption? Temperature C. Amount of dissolve gases Chemical composition D. All of the above

5. What makes up the cone of a volcano ? Pyroclastics only Lava only Combination of Lava and Pyroclastics I & III I & II I, II, & III None of the above

6. How does composition of magma affects its viscosity? The higher the silica content; the lower the viscosity The lower the silica content; the higher the viscosity The lower the silica content; the lower the viscosity There is no relationship

7. What type of volcanic eruption is a steam-driven eruption as the hot rocks come in contact with water.? Vulcanian B. Plinian C.Hydrothermal D. Strombolian

8. Why are the coldest places on earth found at the poles? A. great amount of gaseous particles trap heat from the surface B. great amount of thermal radiation is received by these areas C. less amount of thermal radiation is received by these areas D. less amount of gaseous particles trap heat from the surface

9. How does the windward side differ from the leeward side of a high land? A. The windward receives more precipitation than the leeward. B. The leeward side has more vegetation than the windward side. C. The windward side receives more heat than the leeward side. D. The leeward side receives more precipitation than the windward side.

10. When ocean currents that bring cold water move towards a coastal region, the temperature of that area decreases as warmer air from the land flows to the sea resulting in a cold climate. The statement is : True

11. What is the direction and temperature of the ocean current in the Southern Hemisphere? Counter clockwise; warm Counter clockwise; cold Clockwise; warm Clockwise; cold

12. City A is surrounded by bodies of water and has a moderate climate. It is located near the equator . What will most likely affect the climate of the city? A . latitude B. altitude C. topography D . all of these

13. Why does cloud formation disappear as the air moves slowly towards the leeward side of a mountain ? A. The air condenses as it moves to the leeward side. B. The amount of water vapor is not enough. C. The temperature becomes lower. D. There is too much water vapor .

14. Which of the following can cause global warming? A. volcanic eruptions B. the amount of rainfall C. the rising of warm air into the atmosphere D. increase of the amount of CO 2 in the atmosphere

15. Which of the following is an indication of global warming? rising of sea level decrease of global temperature coastal erosion strong waves in the ocean

16. Which activity does not contribute to global warming? A. reforestation C. mining activities B. illegal fishing D. incineration of garbage

17. . A long term shifting of global weather pattern is called ________________. A.Climate B . Weather C . Climate change D.Global warming

18. Which of the following shows the effect of climate change? rising of sea level deforestation of the forest coastal erosion in some places siltation of bodies of water

19. When does greenhouse effect happen? A. Greenhouse gases on the surface absorb heat from the atmosphere. B . Greenhouse gases on the surface absorb heat from the earth’s interior. C . Greenhouse gases in the upper atmosphere absorb heat from outer space. D . Greenhouse gases in the lower atmosphere absorb heat from the earth’s surface.

20. A thick layer of volcanic ash can be heavy enough to collapse the roofs of buildings because ________________? is solid it can be blown by winds it becomes heavier as it cools it consists of tiny fragments of rocks that becomes heavy as they pile up.

21. Shield volcanoes are formed by the accumulation of lava which is low in silica content and high amount of gas. How will you describe the viscosity of its lava? Highly viscous C. viscous Non-viscous D. can not be determine

22. The following are signs of impending volcanic eruption EXCEPT_______________. Drying of vegetation Localized landslides and rockfalls which are attributable to heavy rains. Ground swells Crater glow due to presence of magma

23. Why do stars have colors ? A. It is because of the presence of oxygen. B. It is because of the presence of carbon dioxide. C. It is because of varied temperatures. D. It is because of the different locations.

24. Which statement best explains why Cygnus is visible to an observer in Manila in September but not visible in March? A. Earth spins on its axis. B . Earth orbits the Sun . C. Cygnus spins on its axis. D. Cygnus orbits the Earth.

25. How do stars appear to move in the night sky? A. From East to West B . From North to South C. From West to East D . From South to North

26. Which constellation is prominent in the Northern Hemisphere during spring? A.Andromeda B . Lynx C . Orion D. Ursa Major

27. Which constellation helps sailors to navigate at the sea? Pisces B . Polaris C. Sagittarius D . Ursa Minor

28. What local constellation signifies the stat of rainy season in the Philippines? Balara B. Buwaya C . Lepu D . Balatik