Study Habits Tutorial and Review CenterUPCAT Review Session 2

Earth Science 1Module # 1

This module covers the topics of Earth Science 1 (ES1) that deals with the forces that shapes the lithosphere, the solid part of the earth, and the forces that govern changes or phenomena that occurs in the hydrosphere brought about by the movement of the earth and other celestial bodies like the moon.

For our purposes this module includes: Concepts Revisited where important concepts and details of the ES1 topics are discussed through the

use of concept outlining, illustrations and concept maps; Self-check where the students’ understanding of the subjects presented are assessed independently that may suggest them to further review the topics or move on to the next modules to be given; Featured Exercises where advance and detailed exercises or questions to practice the students’ critical thinking and analysis; Words to Ponder where suggested sets of terms or concepts are given that may need further clarification as for their relationships, similarities and differences; and the UP Cut where tips and friendly student reminders about UPCAT and UP.

I. The Solid Earth (Lithosphere)

➢

A. Rock vs. Mineral vs. Soil

1. Mineral➢ is a naturally occurring inorganic solid that possesses a definite

chemical structure

1. Rock➢ is an aggregate or combination of one or more minerals

1. Soil➢ is made up of tiny bits of rocks and organic materials from plants and

animals

Properties of Minerals○ Crystal form○ Odor

Concepts Revisited

○ Luster (quality of light reflected from the surface of the mineral: metallic, glassy. Pearly, dull)

○ Color○ Streak (the color of the powder obtained by rubbing a mineral across a

hard, rough surface of a file or unglazed porcelain called streak plate)○ Cleavage (splitting of a mineral along the smooth surfaces or cleavage

plane)○ Fracture○ Hardness (resistance to scratching)

Table 1. Mohs Scale of Mineral Hardness

Relative Scale Mineral Hardness of Some Common Objects

10 Diamond

9 Corundum

8 Topaz

7 Quartz

6 K feldspar 5.5 glass, pocketknife

5 Apatite

4 Fluorite 3.5 copper penny

3 Calcite 2.5 fingernail

2 Gypsum

1 Talc

Things to remember in interpreting the Mohs Scale of Mineral Hardness:

1. The mineral or object with a scale of 10 is the hardest while those with a scale of 1 is the softest.

2. The object or mineral can only scratch those object or mineral below it.

Rock Types

1. Igneous Rocks ➢ formed when magma or lava solidifieda. Extrusive Rocks – rocks that are formed from solidified lava; fine

crystalline rocks

○ “Quick” solidification – obsidian (glassy), pumice (fine pores, floats on water)

○ Slow solidification – basalt (dark colored), felsitesa. Intrusive Rocks – formed from solidified magma; coarsely crystalline

rocks○ Granite, gabbros

1. Sedimentary Rocks ➢ consists of materials that once were part of older rocks or of plants and

animals➢ categorized based on the type of material in which they are formeda. Detrital or Clastic Rocks – rock fragments due to weathering

○ silt → siltstone; clay→ shale; cement grains of sand → sandstone○ conglomerate, breccias

a. Chemical Rocks – formed from deposit of minerals that were once dissolved in water

○ Limestone, coala. Organic Rocks – formed from the remains of organisms.

○ Fossiliferous limestone, chalky limestone1. Metamorphic Rocks

➢ a rock that has changed its appearance and sometimes its mineral composition

➢ formed due to subjection of heat and pressure (metamorphism)➢ examples of rock transformations:

○ granite → gneiss○ limestone → marble○ quart grains in sandstone → quartzite○ soft shale and clay → slate○ impure sandstone and felsites → schist

Rock Cycle

➢ Weathering – the breaking down of rocks brought about by either physical or chemical means

➢ Erosion – the process by which rock fragments and sediments are carried along by such agents

➢ Deposition – the process by which rock fragments and sediments carried by agents of erosion are dropped or deposited in other places

➢ Compacting – the process by which rock fragments and other materials that accumulated (usually at the bottom of a thick column of water), get cemented together and harden into rock

➢ Metamorphism – a change in constitution of rock brought about by pressure, heat and chemical reaction resulting in a more compact and highly crystalline condition of the rock

➢ Melting➢ Cooling and solidifying

B. Earthquakes and Earth’s Interior

1. Earthquake ➢ Shaking of the ground caused by the breaking and shifting of the subterranean

rock under immense pressure➢ Seismology➢ Seismograph – an instrument that records earthquake waves

Earthquake Waves1. Surface Waves/ Long (L) Waves

➢ Travel along the earth’s outer layer1. Body Waves

➢Travel through the earth’s interior○ Primary (P) waves – “push-pull

waves”; can travel through solids, liquids and gases;temporarily changes the volume of the intervening material

○ Secondary (S) waves – shake the particle at their right angle to their direction of travel;cannot travel through fluids; temporarily change the shape of the material that transmits them

Order of Arrival: P, S, L waves

Note: Seismic waves travel at different speeds in materials of different densities. The changes in the speed of earthquake waves indicate

that the earth is composed of different materials. These also indicate the thickness of each layer of the earth.

Intensity and Magnitude1. Magnitude – an index of the quakes energy at its source; Richter Scale2. Intensity – measures the strength of shaking produced by an earthquake at a

particular location; Mercalli Intensity Scale

Causes of Earthquakes

Effects of Earthquakes

2. Earth’s interior

Plate Tectonics➢Continental drift Theory by Alfred

Wegener- the present

seven continents originated from a big landmass called Pangea

- Proofs: fit of South America and Africa

fossil evidences

rock structures

ancient climate

Criticism: Inability to provide an acceptable mechanism for the movement of continents

➢Plate Tectonic Theory

- lithosphere consists of plates that are in motion relative to each other

- Types of plate boundaries:

○ Convergence – plates move together○ Divergence – plates move apart○ Transform fault – plates slide past each other

Volcanism ➢3 General Eruptive Patterns and

Characteristic Forms of Volcanoes:○ Shield○ Cinder○ Composite

Geologic Time

Relative Dating Principles➢Law of Superposition➢Principle of Original Horizontality➢Principle of Cross-Cutting

Relationships

II. Hydrosphere:

Tides: daily changes in the elevation of the ocean surface

– caused by the gravitational attraction of the moon, and to a lesser extent, by the sun

Spring tides Neap tides

Unusually high and low tides Daily tidal range

New moon and full moon First and third quarters of the moon

The sun and the moon are aligned The gravitational force of the sun and the moon are at right angles

1. Human populations in specific locations, locations where there is extensive tectonic activity, should take extensive precautions to minimize loss of: ___________________ and properties.A) diamondsB) livesC) emeraldsD) moneyE) wealth

2. Older crust tends to be ________________, and therefore is denser than younger crust.A) hotterB) higherC) fasterD) youngerE) cooler

3. Of the three known boundaries, the "East-Pacific" Ridge or Rise, is considered to be a _______________________ boundary.A) intermediateB) convergentC) transformD) deepE) divergent

4. The Mariana Trench was most likely created by theA) divergence of the Eurasian and Philippine PlatesB) convergence of the Pacific and Philippine PlatesC) sliding of the Pacific Plate past the North American PlateD) movement of the Pacific Plate over the Hawaii Hot SpotE) divergence of the Pacific and Antarctic Plates

5. Which part of Earth’s interior is inferred to have convection currents that cause tectonic plates to move?A) crustB) outer coreC) asthenosphereD) inner coreE) rigid mantle

6. Primary (P) Seismic Waves can pass through ____________________________.A) liquids onlyB) solids onlyC) gases onlyD) solids, gases, and liquidsE) crust and core only

7. Of the 3 seismic waves, the _____-Waves are the fastest.A) RB) QC) PD) SE) L

Self-Check

8. Secondary (S) Seismic Waves can pass through ____________________________.A) gases onlyB) solids onlyC) liquids onlyD) solids, gases, and liquidsE) crust and core only

9. P-Waves are also said to be ____________-____________ waves.A) east-westB) side-sideC) up-downD) north-southE) push-pull

10. To find the epicenter of an earthquake, at least _____ seismic stations are needed.A) 2B) 1C) 3D) 4E) 5

11. The closest seismic station to the epicenter of an earthquake will record P-Waves ___________________.A) thirdB) secondC) firstD) fourthE) fifth

12. A tsunami forms when the epicenter of an earthquake is on the _____________________ floor.A) convergentB) desertC) crustyD) volcanicE) oceanic

13. Lasers are sometimes used to detect movements along faults. LASER is an acronym for: ____________________________________.A) Light Amplification by Simplified Emission of RadiationB) Light Altercation by Stenographic Emission of RadiationC) Lunar Amplification by Simplistic Emission of RadiationD) Local Altercation by Super Emission of RadiationE) Lunar Amplification by Simplified Emission of Radiation

14. The Ring of Fire is located...A) around the Pacific PlateB) around the Atlantic PlateC) around the San Andreas' FaultD) around the Convergent zoneE) around the Aztec Plate

15.The Hawaiian Islands are in the Ring of Fire. The Hawaiian Islands were formed byA) active calderas, result of a subduction zoneB) active mountains, result of the Aztec plateC) active volcanoes, result of a hot spot

D) active mantle, result of radioactive crustE) active subduction zone, result of a divergent boundary

1. The famous meteorologist who helped bring forth the theory of Continental Drift wasA) Charles DarwinB) Albert EinsteinC) Alfred WegenerD) Charles BronsonE) Alfred Hitchcock

3. Geographically, the east coast of South America seems to fit the __________________________.A) west coast of AfricaB) east coast of AfricaC) west coast of IndiaD) east coast of IndiaE) north coast of Australia

8. Minerals, Petroleum, and Gems are best found in ___________________________ zones.A) transcendingB) divergentC) transformD) convergentE) volcanic

9. Continental Drift Theory asserts that our continents have been ______________________ for millions of years!A) risingB) growingC) movingD) subductingE) dying

14. Between the 3 known types of plate boundaries, the ________________________ zone is most dangerous to human life.A) transformB) convergentC) divergentD) oceanicE) continental

15. Between the 3 known types of plate boundaries, the ________________________ zone is most known for producing precious metals.A) convergentB) transformC) divergentD) oceanicE) continental

1. What does Mt. Pinatubo, Mt. St. Helen's, and Redoubt Volcano of Alaska have in common?A) All three are mountainsB) All three are on the Ring of FireC) All three are safe to visit

Featured Problems

D) All three are on the Mid-Atlantic RidgeE) All three are on top of divergent zones

2. Diamonds are known to be formed in the Earth'sA) outer coreB) surfaceC) inner coreD) mantleE) biosphere

3. Why does the oceanic crust sink beneath the continental crust at a subduction boundary?A) The oceanic crust has a lighter density.B) The oceanic crust is pulled downward by Earth’s magnetic field.C) The continental crust has a more magnetic composition.D) The oceanic crust is hotter.E) The oceanic crust has a greater density.

4. The two types of crust are _________________________ and _________________________.A) oceanic, volcanicB) oceanic, landC) land, pangaeaD) continental, volcanicE) oceanic, continental

5. At mid-ocean ridges, new ____________________________ crust is created.A) continentalB) oceanicC) volcanicD) convergentE) transform

6. Seafloor spreading is a process that creates new ________________________ crust.A) convergentB) continentalC) volcanicD) oceanicE) transform

7. Between oceanic and continental crusts, the ___________________ crust is denser.A) oceanicB) continentalC) convergentD) divergentE) transform

8. In seafloor spreading, the further the ocean floor is away from the mid-ocean ridge, the _____________________ that floor will be.A) youngerB) newerC) rockierD) olderE) prettier

Here is a checklist of must know words. It includes a word or a set of words in each item that you must be familiar with. Using a scratch paper try to illustrate or write the relationship, similarities and differences of the words in each set.

1. Heat and temperature2. Rock, mineral, soil, gem, crystal, precious stone3. Quartz, gold4. Diamond and graphite5. Igneous, sedimentary and metamorphic rocks6. Rock cycle7. Extrusive and intrusive igneous rocks8. Weathering, erosion, deposition, compacting, metamorphism9. Humus, soil, loam, silt, clay, sand, alluvial soil10.Topsoil , subsoil, bedrock11.Deforestation, reforestation, reforestation12.Terracing, contouring, rip rapping, dike13.Covercropping, crop rotation, strip cropping14.Crust, mantle, inner and outer core15.Geologist, seismologist, petrologist16.Geology, seismology, petrology17.Seismograph18.Earthquake, tectonics, plates, tsunamis19.Granite, basalt20.Iron, nickel21.Theory of Plate Tectonics, Theory of Continental Drift22.Diastrophism, volcanism, gradation23.Folding, faulting24.Anticline, syncline25.Water currents, upwelling, surface currents, 26.El Niño, La Niña27.Acid rain28.Fish kill, red tide, algal bloom, water pollution

Note: You really need to be familiarized with these concepts. Remember these are very basic but must not be over-looked. Don’t get the wrong impression that only the definition matters. Remember that what we want here is for you to be familiarized with these concepts through practice because most of the items in the Science part of UPCAT are application so it really matters if you really understand the concept.

Words to Ponder

Tips in reviewing for the Science Part of UPCAT

1. Do NOT Cram!

- As early as now, read, review and revisit all the science concepts you have tackled during your first three years in high school. Good students review at least three months before the exam. Take note: review is different from scanning your notes and books because when you review you allot hours (not just an hour).

2. Learn to Study Effectively and Efficiently

- Most students thought that when they review for longer hours of time they can do better in an exam. This can be partly true. Sometimes, the things that they read don’t really go to their long term memory. Why?

Here are a few reasons why not all that we studied became a part of our long term memory:

1. You just read it. Remember you must understand it and be able to relate to it in order to learn it.

2. Too many distractions. You might be reviewing in a too noisy place. 3. It hasn’t really been processed.4. Lack of focus.5. Too tired to study.

How to study effectively and efficiently:

1. Focus.2. Take down notes.3. Review in a quiet place that is conducive for learning.4. Don’t study when you’re too tired. Take some break, rest and sleep.5. Move away from distractions.

Self-check

Answer key:

1. B2. E3. E4. B5. E6. D

UP Cut

7. C8. B9. E10.C11.C12.E13.A14.A15.C16.C17.A18.D19.C20.A21.A

Featured Problem

Answer Key:

1. B2. D3. E4. E5. B6. D7. A8. D