Question 1 Which of the following region of the atmosphere absorbs harmful ultraviolet radiation? a. Ozone layer CorrectThe ozone layer is a very thin layer which prote cts life on earth by absorbing harmful ultraviolet radiation fromt the sun. b. Ionosphere c. Heterosphere d. Thermosphere Feedback The correct answer is: Ozone layer Question 2 Which of the following is an opening of the Earth’s crust? a. Hill b. Valley c. Volcano CorrectVolcano is a fissure or vent through which molten rock material, r magma and gases from the interior of the Earth erupt on to its surface. The proce sses that create volcanoes and other volcanic structures are called volcanism or vulcanism. As landforms, volcanoes are formed by the deposition of the magma that flows or is ej ected, normally from one or several circular v ents, as molten or solid material. d. Crater The correct answer is: Volcano Question 3 Who among the following scientists paved the way for mo dern exploration by advancing the theory that planets revolve aound the sun? Select one: a. Harvey b. Ptolemy c. Copernicus CorrectCopernicus was the one who theorized that the sun is the center of the solar system and that all the planets revolve around the sun. d. Aristotle The correct answer is: Copernicus Question 4 Which of the following describes the air during humid days? a. Cold and moist b. Warm and moist CorrectHumidity is the moisture content of the atmosphere. The atmosphere always contains some moisture in the form of water vapor, the maximum amount depending on the temperature. The amount of vapor that will saturate the air increases with a rise in temperature: at 4.4 oC, 454 Kg of o f moist air contains a maximum of 2 Kg o f water vapor; at 37.8 oC, 1000 lbs of moist air contains a maximum of 18 Kg of w ater vapor. When the atmosphere is saturated with w ater, the level of
discomfort is high because the evaporation of moisture from the body as perspiration, with its attendant cooling effect is impossible. c. Warm and dry d. Cold and dry The correct answer is: Warm and moist Question 5 Farmers are advised by agriculturists to plant which of the following crops during El Nino? a. Green leafy vegetables b. Upland rice crops c. Root crops CorrectRain is sc arce during El Nino. Root crops need less water so they can survive through a season of less rain. d. Corn crops The correct answer is: Root crops Question 6 Which of the following elements is most common in the earth's crust? a. Calcium b. Silicon CorrectSilicon is the most common in the earth's crust. Some of the earth's crust materials come from the magma beneath it. This magma contains a high percentage of silicon and oxygen. The earth's crust has 88 elements, only a few of which are commonly found in magma. Of all these elements, only eight make up an essential part of the earth's crust and therefore o f most rocks. c. Iron d. Aluminum The correct answer is: Silicon Question 7 The process by which water evaporates ev aporates from plants is called as: a. Transpiration CorrectThrough the process of transpiration, more than 90% of the water taken in by plant roots is ultimately lost to the atmosphere, almost all of it from the leaves. It passes out primarily through the stomata in the form of water vapor. b. Vapor release c. Exhalatioin d. Advection The correct answer is: Transpiration Question 8 Which of the following may not help control floods? a. Construction of flood ways b. Deforestation CorrectDeforestation te wanton c utting of trees without replacing those that were cut. The roots of the trees hold the soil to prevent floods. Deforestation therefore, is not a means to control floods
c. Reforestation d. Crop rotation The correct answer is: Deforestation Question 9 This is the lowest portion of the atmosphere: a. Exosphere b. Ionosphere c. Troposphere CorrectTroposphere is the lowest layer of the Earth’s atmosphere and the site of all weather processes making up its climate (weather over long periods of time). It exte nds up to an altitude of about 11 Km above the polar zones and to about 16 Km above the equatorial regions. The tropopause forms the boundary between troposphere and stratosphere. d. Stratosphere The correct answer is: Troposphere Question 10 Which of the following determines the development of soil in a particular place? a. The type of bedrock b. All of the above CorrectThe Correc tThe climate of an area is the most important factor in determining how soils are formed. Chemical weathering, which t urns rocks into soil, takes place more quickly in climates with high temperatures and plentiful rainfall. The mineral composition of the rock can affect the rate of weathering as well as the composition com position of the soil forms. The mineral composition of the rock can affect the rate of weather ing as well as the composition of the soil. A spadeful of a dark, rich soil will reveal numerous earthworms, ants and other burrowing animals. The burrowing action of these animals serves to mix the soil and produce passages t hrough which water and air can pass. Organic wastes from these animals enrich the soil further, enhancing its quality c. Climate d. Presence of plant and animal life The correct answer is: All of the above Question 11 Factories need permits from t he DENR before they can operate. This will ensure which of the following? a. Environmental friendliness b. Pollution prevention c. Viability of the factory d. Environmental clearance CorrectDENR is the acronym for Department of Environment and Natural Resources. This option pertains to the viability of having a factory that is cleared from causing any form of hazardous activities to the environment. The correct answer is: Environmental clearance Question 12 Complete the statement: All the planets in the solar system ______________. ______________.
a. Are exactly of the same size b. Revolve around the sun CorrectThe g eneral characteristic of a planet is t hat it revolves around the sun. It is not considered as a planet if it does not revolve around the sun c. Can all maintain life d. Have the same temperature Feedback The correct answer is: Revolve around the sun Question 13 Seasons occur because of which of t he following? a. Earth may be near or far from the sun b. Solar radiation did not reach the surface of the earth c. The earth revolves around the sun, it also rotates on its axis d. Earth's axis is tilted CorrectBecause the earth's axis is tilted, the so lar radiation received by different parts of the Earth is not the same. Thus, the temperature of these areas are not also the same. When the North Pole is tilted towards t he sun, the northern hemisphere receives more of the sun's energy and temperature there are higher. This is the start of summer of the start of the dry season in parts of the northern hemisphere and the start o f winter or wet season in parts o f the southern hemisphere. The correct answer is: Earth's axis is tilted Question 14 In a community near a volcano, which rock type is most likely to be found? f ound? a. Sedimentary b. Lava c. Igneous CorrectIgneous rock is formed by the cooling and subsequent solidification of a molten mass of rock material, known as magma. C omposed almost entirely of silicate minerals, igneous rocks are often classified by their silica content. The major c ategories are referred to as acid and basic, with granite and rhyolite typical of the former, gabbro and basalt the latter. d. Metamorphic The correct answer is: Igneous Question 15 It is the movement of the huge solid rock plates of the Earth: a. Weathering b. Diastrophism c. Erosion d. All of the above CorrectDiastrophisms are movements of rock plates of the Earth’s crust that result in the formation of the continents and islands. The correct answer is: All of the above Question 16 According to this theory, the universe was once in an extremely hot and dense state which expanded
Select one: a. Nebular Theory b. Big Bang Model CorrectBig Bang Model – Model – The The Universe was once in an extremely hot and dense state which expanded rapidly. This rapid expansion caused the young universe to cool and resulted in its present continuously expanding state. c. Plasma Expansion Theory d. Heliocentric Model The correct answer is: Big Bang Model Question 17 Which of the following may be observed when t he moon cannot be seen at all because it passes directly between the earth and the sun? a. First quarter b. Full Moon c. Last quarter d. New Moon CorrectDuring the new moon phase, the moon is between the earth and the sun, blocking the light from the sun, during, this t his phase the moon is not observable The correct answer is: New Moon Question 18 Why is the invention of the telescope te lescope so significant? a. Because it analyes the composition of the planet b. Because it determines the age of the stars c. Because it allows for the t he observation of objects that are distant CorrectTe lescope came from the two Latin words "tele" meaning far and scope (skopos) meaning to see. The telescope, therefor, is used to see and observe far objects d. Because it brightens the light coming from the stars The correct answer is: Because it allows for the observation of objects that are distant Question 19 It is the natural transfer of soil and other materials from one place to another: Select one: a. Pollination b. Migration c. Erosion CorrectErosion refers to the natural physical and chemical processes by which the soil and the rocks of the Earth’s crust are continuously abraded and corroded. Most erosion results from the combined activity of several factors such as heat, cold, gases, water, wind, gravity gr avity and plant life. d. Fragmentation The correct answer is: Erosion Question 20 When does solar eclipse occur?
a. When the Earth is between the moon and the sun b. When the Earth is behind the sun c. When the moon is between the Earth and the sun CorrectDuring solar eclipse, the moon is between the Earth and the sun. The moon blocks the light from the sun, casting a shadow on Earth d. When the is between the Earth and the moon Feedback The correct answer is: When the t he moon is between the Earth Eart h and the sun Question 21 This is a rigid shell of the earth e arth which is made up of plates containing the continents and oceans: a. Hydrosphere b. Lithosphere CorrectLithos is a gree k work which means stone. The lithosphere is the near rigid outer shell of the Earth, comprising the cr ust and the uppermost layer of the mantle, and made up of numerous blocks that are in motion in relative to each other – other – the the plates of plate tectonics theory. c. Atmosphere d. Stratosphere The correct answer is: Lithosphere Question 22 The factors listed below contributes to the greenhouse effect, except: a. Excessive use of detergents CorrectGreen Co rrectGreen house gases in the Earth's atmosphere include carbon dioxide, methane and nitrous oxide. Carbon dioxide is produced during forest fires and burning of wastes. Deforestation clears forests with tree s. Trees use carbon dioxide for photosynthesis so when trees are gone t he amount of carbon dioxide in air from car bon dioxide producing organisms and the other sources will increase. Excessive use of detergents may cause eutrophication when dumped to bodies of water. b. Extensive deforestation c. Uncontrollable burning of wastes d. Forest fires The correct answer is: Excessive use of detergents Question 23 The sun is mostly made of which gas? a. Hydrogen CorrectThe sun is a burning fuel and that fuel is hydrogen which is the most comon material in the universe. The gas is consumed through nuclear fusion in the sun's core wherein four hydrogen gas particles come together to m ake a helium nucleus. The sum of the masses of all the particles produced in the reaction is less than the mass of the original four protons. The lost mass has been converte d into energy - the nuclear energy that powers the sun and eventually radiates out into space. b. Nitrogen c. Oxygen d. Helium Feedback
The correct answer is: Hydrogen Question 24 The Philippines lies in the region where many volcanoes are active. This region is termed as: a. Archipelagic fault line b. Wheel of Fire c. Volcanic Rim d. Ring of Fire Correc tThe Philippines is considered one of the countries with many volcanoes and volcanic eruptions. This is because our country lies in the Pacific R ing of Fire a region of high seismic se ismic and volcanic activities that surruds the basin of Pacific Ocean The correct answer is: Ring of Fire Question 25 The movement of a wind is always from: a. East to west region b. North to south region c. Low pressure region to high pressure region d. High pressure region to low pressure region CorrectAir has mass and volume and exe rts pressure. In cool air, the molecules move cloer together causing the air to become denser and to sink. Thus the dense air causes a high pressure area. low pressure areas may form when air is warmed, causing molecules to move apart and to become less dense. Air moves from an area of high pressure to an are a of low pressure. This movement of air is caused by density differences in wind. The correct answer is: High pressure region to low pressure region Question 26 Tropical disturbance are classified as tropical depression, tropical storm or typhoon. The classification is based on the ________________. ________________. a. Amount of rainfall b. Amount of rainfall and strength of accompanying winds c. Origin of formation d. Strength of the accompanying winds CorrectPAGASA classifies the weather disturbances according to the strength of the accompanying ac companying winds. The amount of rainfall is not the basis of classifying weather disturbances. The correct answer is: Strength S trength of the accompanying winds Question 27 According to this theory theory the earth’s surface consists of plates whose constant motion explains continental drift, mountain building and occurrence of earthquakes. a. Wegenerian Theory b. Volcanism c. Plate Tectonics CorrectPlate Tec tonics is the theory of global tectonics (Geological struct ural deformations) that has served as a master key, in modern geology, for understanding the structure,
history and dynamics of the Earth’s Lithosphere which includes the crust. The theory is based on the observation that the solid layer of the Earth’s lithosphere lithosphere is broken up into about a dozen semi-rigid semi-rigid plates. The boundaries of these plates are zones of tectonic activity, where earthquakes and volcanic eruptions tend to occur. d. Diastrophism The correct answer is: Plate Tectonics Question 28 These are rocks formed at the bottom of the sea: Select one: a. Metamorphic b. Magma c. Sedimentary CorrectSedimentary rocks consist of sediments at the bottom of the se a that hardened through time. d. Igneous The correct answer is: Sedimentary Question 29 Which among the following protects living things on Earth from the harmful radiation of the sun? Select one: a. Atmosphere b. Ozone Layer CorrectOzone is the layer in the atmosphere that serves as a screen from the harmful effects of the sun’s radiation. c. Carbon monoxide d. Clouds The correct answer is: Ozone Layer Question 30 When molten rock materials are expelled outside the earth’s surface they are termed as: Select one: a. Dunes b. Magma CorrectMagma is molten rock beneath the earth’s su rface, but molten rock c. Steam d. Lava The correct answer is: Magma Question 31 Which of the following exemplifies a solar eclipse? Select one: a. The shadow of the Earth blocks the moon b. The Earth is between the moon and the sun
c. The sun is between the Earth and the moon and its shadow obscures the latter CorrectA solar eclipse occurs when the moon passes between the Earth and the sun and its shadow falls on the Earth. Although the sun’s diameter is 400 times greater than that o f the moon, it is also about 400 times farther. This makes their diameters apparently the same from the Earth. d. The moon passes between the Eart h and the Sun and its shadow falls on the Earth The correct answer is: The sun is between the Earth and the moon mo on and its shadow obscures the latter Question 32 Which of the following is the correct sequence of the eras of the earth's history from the oldest to the most recent? Select one: a. Cenozoic, Mesozoic, Precambrian, Mesozoic b. Paleozoic, Cenozoic, Precambrian, Mesozoic c. Precambrian, Mesozoic, Cenozoic, Paleozoic d. Precambrian, Paleozoic, Mesozoic, Cenozoic CorrectIn geo logic timetable, it was theorized that the Eart was formed out of nothing. The Precambrian er a described the Earth to be void, with no water, air. Nothing existed. It was followed by Paleozoic era where unicellular organisms started to exist; Mesozoic era and its Jurassic period, and the latest which is the Cenozoic era. The correct answer is: Precambrian, Paleozoic, Mesozoic, Cenozoic Question 33 Which of the following climate types in the c ountry makes November to April relatively drier than other parts of the year? Select one: a. No dry season b. Two pronounced seasons c. Rainfall distributed throughout the year d. Wet and dry season CorrectNovember Cor rectNovember to April is relatively drier than other parts of the year. Two pronounced seasons – seasons – dry dry from November to April, and we t for the rest of the year. No dry season – season – wet season throughout but maximum rainfall is from November to January. The correct answer is: Wet and dry season Question 34 This property can identify a substance: a. Density CorrectDensity is the property o f the substance which can identify it. It is the ratio of the mass of a body to its volume, usually expressed in such units as kilograms per cubic meter, or pounds per cubic foot. b. Color c. Components d. Impact Feedback The correct answer is: Density
Question 35 If the North Pole is tilted towards the sun, what is the season at the north of the equator? Select one: a. Spring b. Summer CorrectIf the North Po le is tilted towards the sun, the area north of the equator is exposed more directly to sunlight. Thus, the season in this area is summer. c. Winter d. Fall The correct answer is: Summer Question 36 Which layer of the atmosphere returns radio and TV broadcasts back to Earth? a. Stratosphere b. Troposphere c. Ionosphere CorrectIonosphere or Thermosphere, is the name given to a layer or layers of ionized air in the atmosphere extending from almost 80 km (50 mi) above the surface of the Earth to altitudes of 640 km (400 mi) and more. At these altitudes the air is extremely thin, having about the density of the gas in a vacuum tube. The ionosphere exerts a great influence on the propagation of radio signals. Energy that is radiated from a transmitter upwards towards the ionosphere is in part refracted, or be nt downwards again, towards the surface of the t he Earth. The bending effect makes possible the reception of radio signals at distances much greater than would be possible for waves that travelled along the surface of the Earth. d. Exosphere The correct answer is: Ionosphere Question 37 In evaporation, liquid water molecules becomes: a. Atoms of the hydrogen and oxygen b. Separate atoms of water c. Tiny drops of water d. Molecules of water vapor Correct Evaporation is the process by which a liqiod changes into gas. In this process, liquid water molecules become molecules of water vapor which is the gaseous form of water molecules. The correct answer is: Molecules of water vapor Question 38 The increasing amount of which of the following in the atmosphere contributes to global warming? a. Mercury b. Carbon dioxide CorrectThe amount of Car bon dioxide in the atmosphere has been increasing by 0.4% a year because of t he use of fossil fuels such as oil, gas and c oal; the slash-and-burn clearing of tropical forests has also been a contributing factor in the carbon cycle. This has led to a phenomenon called global warming.
c. Argon d. Nitrogen Feedback The correct answer is: Carbon C arbon dioxide Question 39 Which of the following is true regarding monsoons? a. It causes rainy weather not attributed to tropical cyclones CorrectMonsoons are seasonal changes in atmospheric circulation and precipitation due to asymmetric heating of land and sea. Northeast monsoon (Amihan) – (Amihan) – blows blows from November to April causing rainy weather. Southwest monsoon (Habagat) – (Habagat) – blows blows from May to October causing rainy weather . b. The Northeast monsoon blows from November to April causing dry cold weat her c. The Northeast Monsoon blows from May to October causing rainy weather d. These are seasonal changes in atmospheric circulation and precipitation due to asymmetr ic heating of mountains and plains The correct answer is: It causes rainy weather not attributed to tropical cyc lones Question 40 Lunar eclipse does not occur eac h month because: a. The dark side of the moon rarely faces the earth b. The earth is usually between the moon and the sun c. The moon's orbit is at an angle t o the earth's orbit around the sun CorrectThe moon's orbit is at an angle to the earth's orbit or bit around the sun d. The moon rarely comes close e nough to the earth The correct answer is: The moon's or bit is at an angle to the earth's orbit around the sun Question 41 When a violent storm occurs over the Pacific region, it is termed as: a. Tornado b. Typhoon CorrectHurricane is the name applied to migratory tropical cyclones that originate over oceans in certain regions near t he equator, and particularly to those arising in the West Indian Region, including the Caribbean Sea and the Gulf of Mexico. Hurricane type cyclones in the western Pacific are known as typhoons. c. Monsoon d. Cyclone The correct answer is: Typhoon Question 42 The formation of fog generally occurs after the ground has lost heat by which of o f the following mechanisms? a. Radiation CorrectAlthough all four choices contribute to t he formatioin of fog, heat loss which eventually leads to fog formation is greatly caused by radiation. Radiatioin fog forms over land when
moist air cools on clear nights. As the ground and the moist air above it cools rapidly, the dew point is quickly reached as compared to other fog types. Water vapor then condenses as droplets of fog. Radiation fog often lingers throughout the early daylight hours until the tempe rature rises enough to evaporate the moisture b. Evaporation c. Transpiration d. Convection The correct answer is: Radiation R adiation Question 43 Question text According to this theory, the earth e arth initially has one single continent and broke off to several pieces which became the continents of today: Select one: a. Sea floor Spreading Theory b. Plate Tectonics Theory c. Continental Drift Theory CorrectAccording to Alfred Wegener in the Continental C ontinental Drift Theory, the Pangaea is the single major continent co ntinent which broke into two piece (Laurasia and Gondwanaland) d. Pangaea The correct answer is: Continental Dr ift Theory Question 44 Which of the following is not true regarding the greenhouse effect? Select one: a. The heat is absorbed in each laye r of the atmosphere through the greenhouse gases. b. About 50% of the sun’s energy is absorbed at the Earth’s surface and the rest is reflected by clouds c. Increasing the concentration of the greenhouse gases helps cool the earth’s surface CorrectIncreasing the concentration of the greenhouse gree nhouse gases increases the amount of absorption and radiation, and thereby further warms the earth surface. d. The absorbed energy warms the earth’s surface. The surface of the Earth, warmed to a temperature around 255 K, radiates infrared heat. The correct answer is: Increasing the concentration of the greenhouse gases helps cool the earth’s surface Question 45 Where are fossils mostly found? a. Metamorphic rocks b. Igneous rocks c. Plutonic rocks d. Sedimentary rocks CorrectSedimentary rocks originated from the sediments of water resources. Fossils are markings of ancient organisms which are aquatic in nature Feedback
The correct answer is: Sedimentary rocks Question 46 These are huge waves that accompany ac company volcanic eruptions and earthquakes under the sea: Select one: a. Tsunamis CorrectTsunami is the scientific term for a seismic sea wave, a large oce an wave generated by an undersea earthquake. The wave is t hought to be triggered when the ocean floor is tilted or offset during the quake. Another possible cause is an undersea landslide or volcanic eruption. Tsunamis have erroneously been called tidal waves, but they have nothing to do with diurnal pattern of high and low tides. b. Tidal waves c. Volcanic bombs d. Steambursts Feedback The correct answer is: Tsunamis Question 47 The following are effects of deforestation, except: Select one: a. Global warming b. Pollution CorrectHarmful substances known as pollutants contaminate bodies of water, air or soil causing pollution. Clearing forests and trees results to flash floods, global warming and landslides c. Landslides d. Flash floods The correct answer is: Pollution Question 48 The troposphere is considered warmest near the Earth's surface. Which of the following statements best explains this phenomenon? a. Lightning strikes the surface which in t urn heats the layer above b. The air is most compressed there by the weight of the atmosphere c. The earth's surface reradiates solar energy which heats the lower troposphere CorrectLess than half of the sun's energy coming to the earth actually reaches the surface. Most of t he radiation that does strike the earth is absorbed by the surface. The energy is reradiated re radiated as infrared radiation which heats the lower troposphere. The radiation is also called heat energy. The warmer the troposphere tro posphere becomes, the more infrared radiation is given off. d. Radioactive elements in the earth's cr ust heat atmosphere above the ground The correct answer is: The earth's surface reradiates solar energy which heats the lower troposphere Question 49 It is the mixture of gases surrounding the Earth:
a. Hydrosphere b. Lithosphere c. Aeropsphere d. Atmosphere CorrectThe atmosphere is a mixture of gases surrounding any celestial object that has a gravitational field strong enough to prevent the gases from escaping. The principal constituents of the atmosphere of the Earth are Nitrogen (78%) and Oxygen (21%). The other gases gases making up the Earth’s atmosphere are Argon, Carbon dioxide, Water vapor and small amounts of Hydrogen, Ozone, Methane, Carbon monoxide, Helium, Neon, Krypton and Xenon. The correct answer is: Atmosphere Question 50 Among the following, which one has the greatest gravitational force? a. Saturn b. Sun CorrectIn the solar system, the sun has the greatest gravitational force since it is the most massive among all the objects in it. c. Earth d. Jupiter The correct answer is: Sun
