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Examen quimestral octavo

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Page 1: Examen quimestral octavo

Science and Technology


Q u i m e s t r a l E x a m

Name: __________________________________________________ ID Number: ____________ 8vo de E.B.S. ________

Teacher: Juan Francisco García Date: ______________

Before you start, read carefully each instruction, take your time to answer, check your spelling and grammar and be sure to write down your full name and ID number on the spaces assign for it. The exam is graded over 100 points. During the test you cannot use any dictionary, electronic device and it´s forbidden to ask for any

other material. Best of lucks to you.

I. IN THE FOLLOWING SECTION, RELATE THE CONCEPTS TO THE CORRECT MEANING. (40 Points Total) 1. In the next table, write down the letter of the concept related to the correct meaning. (1 point each

answer, 10 points total)


A. THEORY Portions of the crust that move over the asthenosphere and may produce earthquakes when they crash.

B. VOLCANO A statement of what always happens in certain situations or conditions.

C. SCIENTIFIC LAW A method design to see changes of cause and effect in nature.

D. TECTONIC PLATE An idea or set of ideas that tries to explain something.

E. EXPERIMENT Huge, hot, bright balls of gas that are trillions of kilometers away from Earth.

F. VARIABLE A mountain with a hole at the top through which steam, hot melted rock, fire, etc. sometimes come out.

G. STAR A very large round objects in space that moves around the sun or another star.

H. NEBULA A situation, number or quantity that can vary or be varied.

I. PLANET An idea that is suggested as the possible explanation for something but has not yet been found to be true or


J. HYPOTHESIS Regions of interstellar gas consisting of celestial bodies made of ice and rock.

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2. In the following section, write down the meaning of the following words. (1 point each answer, 10 points total)

a. Hydrology :______________________________________________________________ b. Protozoa:_______________________________________________________________ c. Cytoskeleton: ___________________________________________________________ d. Abiotic: ________________________________________________________________ e. Hypodermic: ____________________________________________________________ f. Hemophilia: ____________________________________________________________ g. Insecticide: _____________________________________________________________ h. Anaerobic: _____________________________________________________________ i. Bilateral: _______________________________________________________________ j. Subspecies: _______________________________________________________________

3. Complete the following statements with the words that are missing. (1 point each answer, 20

points total) a. _________________ is the name given to the atmosphere used in breathing and

photosynthesis. b. The lithosphere is divided into _______________, _________________ and core. c. A _______________________ volcano is composed of one central vent and produces a high

explosive eruption. d. When meteors fall down into the Earth, they burn in the ________________________. e. The Galilean Moons are ___________________, Callisto, _______________ and

_______________________. f. The planet ___________________ is well known for their amazing rings, formed by

_______________ and dust. g. The planet closest to the Sun is named _________________. h. The __________________ is the line where the sky and the Earth appear to meet. i. The red color of the surface of Mars is due by ________________________. j. The troposphere is the layer of the atmosphere that contains the ______% of the gases on the

planet. k. The asthenosphere plastic feature is due by the ____________________ that forms it. l. ________________ are sets of stars, celestial bodies, dust and gases moving around a central

core, like the Milky Way. m. The _______________ is an imaginary point in the sky directly above an observer on Earth. n. You can found ice clouds in the mesosphere called _____________________. o. The _______________________ is the layer of the Earth that contains all the water in the

planet. p. The stratosphere contains a gas molecule called ____________, which is responsible of

protecting the planet against UV radiation.

II. IN THE FOLLOWING SECTION, SELECT THE CORRECT ANSWER FOR THE NEXT STATEMENTS. (45 Points Total) 4. TRUE OR FALSE. Choose if the statement is True or False. The following section applies the rule of

success minus mistake. For each mistake you have, you lose one of your successful answers. (1 point each answer, 25 points total)

a. An astrolabe is a tool used by astrologist to measure the constellations. ( ) b. The three types of rocks are igneous, metamorphic and sedimentary. ( ) c. Constellations are a group of stars that form recognizable patterns in the sky. ( ) d. Stars are classified by their spectra and their temperature. ( ) e. An orange stars temperature is above the 10000ºC. ( )

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f. Stars like Rigel and Betelgeuse are examples of red stars. ( ) g. The Orion constellation is form only by 3 stars named the Orion Belt stars. ( ) h. During an experiment, the dependent variable is the one that influences the change in the

independent variable. ( ) i. There are only 9 real planets in the Solar System. ( ) j. The word HETERO means SIMILAR. ( ) k. Scientists use an experiment to search for cause and effect relationships in nature. ( ) l. The Mount Vesubio is an example of shield volcano. ( )

m. The Nazca and Cocos Plate are responsible for lifting up the Andes Mountains. ( ) n. The Earth`s Core contains large amounts of a mineral called bronze. ( ) o. Controlled variables are quantities that a scientist wants to remain constant, and he must

observe them as carefully as the dependent variables. ( ) p. Weight or mass is an example of a variable that is very hard to measure. ( ) q. Venus has the hottest atmosphere of the planets in the Solar system. ( ) r. Triton is a moon orbiting the planet Saturn. ( ) s. The “Voyager 1” is a satellite sent to investigate the planet Mars. ( ) t. During the formation of planet Earth, at beginning there was two continents named Pangea

and Panthalassa. ( ) u. Most cinder cones volcanoes have a crater at the summit which contains a central vent or a

clustered group of vents. ( ) v. Shield volcanoes are built almost entirely of fluid lava flows. ( )

w. The Hawaiian Islands are composed of linear chains of lava dome volcanoes. ( ) x. Volcanic or lava domes are formed by relatively large, bulbous masses of lava too viscous to

flow any great distance; consequently, on extrusion, the lava piles over and around its vent. ( )

y. Continental crust is made of denser materials than the oceanic crust. ( )

5. MULTIPLE CHOICES. Select the correct answer and make a circle around it. The following section applies the rule of success minus mistake. For each mistake you have, you lose one of your successful answers. (1 point each answer, 20 points total)

a. After scientists analyze the results of their experiments, they ____. i. form hypotheses ii. include a control iii. communicate those results to other people iv. choose the variables they want to test

b. An extremely hot and solid sphere made almost of iron and nickel at the center of the Earth is called:

i. crust ii. mantle iii. inner core iv. outer core v. lithosphere

c. Which of the following steps to solve a problem must be completed first? i. analyzing data ii. recognizing and identifying the problem iii. forming a hypothesis iv. testing a hypothesis

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d. Which of the following is not a layer of the lithosphere: i. Outer core ii. Asthenosphere iii. Crust iv. Mesosphere v. Thermosphere

e. What characteristic must be true of a good hypothesis? i. It must be correct. ii. It must have been observed many times. iii. It must involve quantitative data. iv. It must be testable by observation or experiment.

f. Which sentence best describes a scientific theory? i. It can never change. ii. It can change every time it is tested. iii. It can be proven conclusively. iv. It is well-tested and explains a wide range of observations.

g. Which of the following gases doesn`t belong in the air composition of Earth´s atmosphere: i. Helium ii. Ozone iii. Nitrogen iv. Oxygen v. None of the above.

h. The moon the highest volcanic activity in the Solar System is named: i. Callisto ii. Titan iii. Io iv. Ceres

i. The type of tectonic plate boundary that forms from a collision between two tectonic plates is a:

i. Divergent plate boundary ii. Transform plate boundary iii. Convergent plate boundary iv. Normal plate boundary

j. Scientists’ knowledge of the Earth´s interior has come primarily from: i. Studying magnetic reversals in oceanic crust. ii. Using a system of satellites called the global positioning system. iii. Studying seismic waves generated by earthquakes. iv. Studying the pattern of fossils on different continents.

k. The mesosphere is 25550 km thick, and the asthenosphere is 250 km thick. If you assume that the lithosphere is 150 km thick and that the crust is 50km thick, how thick is the mantle?

i. 2950 km ii. 2900 km iii. 2800 km iv. 2550 km

l. What does tsunami mean? i. A large earthquake. ii. A shock wave. iii. A giant ocean wave.

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iv. A cloud of gas and dust. m. A theory that helps explain the causes of both earthquakes and volcanoes is the theory of:

i. Pyroclastics. ii. Plate tectonics. iii. Climatic fluctuation. iv. Mantle plumes.

n. Magma forms within the mantle most often as a result of i. High temperature and high pressure. ii. High temperature and low pressure. iii. Low temperature and high pressure. iv. Low temperature and low pressure.

o. If volcanic dust and ash remain in the atmosphere for months or years, what do you predict will happen?

i. Solar reflection will decrease, and temperatures will increase. ii. Solar reflection will increase, and temperatures will increase. iii. Solar reflection will decrease, and temperatures will decrease. iv. Solar reflection will increase, and temperatures will decrease.

p. Which of the following planets does not have a moon? i. Mercury ii. Mars iii. Uranus iv. None of the above v. All of the above

q. Why can liquid water not exist on the surface of Mars? i. The temperature is too high. ii. Liquid water once existed there. iii. The gravity of Mars is too weak. iv. The atmospheric pressure is too low.

r. Of the following, which is the largest body? i. The moon ii. Pluto iii. Mercury iv. Ganymede

s. The many colors of Jupiter’s atmosphere are probably caused by ___________ in the atmosphere.

i. Clouds of water ii. Methane iii. Ammonia iv. Organic compounds

t. In the vacuum of space, light travels 3 x 108 m/s. how far does light travel in 1 hour in space?

i. 3600 m ii. 1.80 x 1010 m iii. 1.08 x 1012 m iv. 1.08 x 1016 m

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III. IN THE FOLLOWING SECTION ANALYZE AND ANSWER THE FOLLOWING QUESTIONS. (15 Points Total) 6. Draw and describe the 3 types of tectonic plate movements. (1 point per drawing, 1 point per name

and 1 point per explanation, 9 points total)

7. In the following problem, read carefully and analyze and answer the following questions. (4 Points Total) “Smithers think that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made

1,587 stacks, Group B made 2,113 stacks.” Identify the: 1. Control Group (1 point) 2. Independent Variable (1 point) 3. Dependent Variable (1 point) 4. What should Smithers' conclusion be? (1 points)

8. List the name of the Planets of the Solar System from the farthest to the closest to the Sun. (2

Points Total)