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LET Reviewer: Physical Science Part 7

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LET Reviewer: Physical Science Part 7


Physical Science Part 7

1. Which of the following conditions rather than faulting
A. Low temperatures and low confining pressures
B. Low temperatures and high confining pressures
C. High temperatures and low confining pressures
D. High temperatures and high confining pressures

2. In which of the following climates will chemical weathering be most rapid?
A. Hot and dry
B. Cold and dry
C. Hot and humid
D. Cold and humid

3. Which of the following statements about weathering is false?
A. Rock of different composition weather at different rates.
B. Heat and heavy rainfall increase the rate of chemical weathering.
C. The presence of soil slows down the weathering of the underlying bedrock.
D. The longer a rock is exposed at the surface, the more weathered becomes.

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4. Why do agricultural areas often experience the greatest amount of soil erosion?
A. Because farms are typically located near streams
B. Because farmers usually remove trees from their fields
C. Because they typically occur in areas of moderately steep slopes
D. Because farming usually involves plowing the soil to plant seeds

5. What can happen to global temperatures for several years after a volcanic eruption.
A. Temperatures may increase
B. Temperatures may decrease
C. Temperatures can create more volcanoes
D. Temperatures are not affected by volcanic eruptions

6. Which of the following correctly describe diastrophism?
A. It refers to the boundaries between crustal plates.
B. It refers to a discredited theory of continent formation.
C. It refers to all process in which magma moves from Earth’s surface to or near the surface.
D. It refers to all the deformation of Earth’s crust by bending or breaking in response to great pressures exerted either from below or from within the crust.

7. What is the evaporation of water from plant surface especially through stomates?
A. Condensation
B. Perpiration
C. Respiration
D. Transpiration

8. Which of the following processes form clouds?
A. Condensation
B. Evaporation
C. Precipitation
D. Transpiration

9. Which of the following is/are a natural factors that may disrupt the water cycle?
A. Water pollution
B. Drying of ground water
C. Mismanaged domestic and industrial use of water
D. Both A and C

10. Fresh water is an integral part of hydrologic cycle. How is it produced?
A. Condensation
B. Desalination
C. Evaporation
D. Transpiration

11. Fresh water is an integral part of hydrologic cycle. How is it produced?
A. Condensation
B. Desalination
C. Evaporation
D. Transpiration

12. Which of the following is included in the term hydrosphere?
A. All the water on the planet.
B. All the freshwater on the planet.
C. All water on the surface of the continents.
D. All the liquid water on the Earth, minus ice.

13. What is the main difference between swamps and marshes?
A. Trees versus grassland
B. High water table versus low
C. Salt water versus fresh water
D. Seasonality of precipitation

14. Alake will become saline if____________.
A. lake levels decrease
B. precipitation exceeds evaporation
C. evaporation exceeds precipitation
D. the lake has no natural drainage outlet

15. What is the other name of typhoon?
A. Low pressure area
B. Hurricane
C. Tornado
D. Twister

16. What is the difference among typhoon, a hurricane, and a cyclone?
A. While typhoons are strong storms, cyclones are worse, and hurricanes are the strongest of all.
B. Hurricanes spin clockwise, cyclone spin counter clockwise, and typhoons are actually tidal waves.
C. Typhoons are found near the equator, hurricanes in the midlatitudes ad typhoons in the arctic and antartic.
D. The storms are the same but the manes are used in the Western Pacific North America and Indian Ocean, respectively.

17. Which one of these revolving weather is the smallest?
A. Hurricane
B. Tornado
C. Tropical Cyclone
D. Typhoon

18. What happens when the rate of evaporation equals the rate of condensation?
A. Clouds form.
B. Precipitation occurs.
C. The humidity decreases.
D. The dew point is reached.

19. Which is the cause of change of seasons?
A. The rotation of the Earth
B. The tilt Earth’s axis
C. The rain-shadow effect
D. The sizes and shapes of land surface features

20. What causes changes in weather?
A. Cloud formation
B. Water evaporation
C. Air humidity
D. Air masses interaction

21. What part of the atmosphere protects Earth’s surface from harmful ultraviolet radiation?
A. Exosphere
B. Mesosphere
C. Stratosphere
D. Troposphere

22. The aurora borealis and aurora australis are caused by interaction between charged particles and Earth’s magnetic field. What layer of Earth’s atmosphere contain these particles?
A. Exosphere
B. Mesosphere
C. Ozonosphere
D. Thermosphere

23. Which is a deep layer of electrically charged molecules and atoms that reflects radio waves?
A. Exosphere
B. Ionosphere
C. Radiosphere
D. Troposphere

24. The Earth completes one revolution around the sun in 365 days. Compared the earth, how long does it take Mercury to complete one revolution?
A. Less than the Earth
B. Greater than the Earth
C. The same as the Earth
D. Cannot be determined

25. What two properties of stars are being directly compared in the Hertzsprung-Russel Diagram?
I. Size
II. Temperature
III. Luminuosity
IV. Density
A. I and II
B. II and III
C. III and IV
D. I and IV

26. How is the atmospheric pressure of Mars when compared to the atmospheric pressure of the Earth?
A. Half as much as that of the Earth
B. About the same as the Earth
C. About 1/100th that of the Earth
D. About 100 times as great as the Earth

27. Which of the following statements is TRUE for both Saturn and Jupiter?
A. Both rotate faster than the Earth.
B. Both rotate slower than the Earth.
C. Only one rotates rapidly while the rotates very slowly.
D. Their periods of rotation are linked to their period of revolution.

28. According to Kepler’s Law, what is the shape of all orbits of the planets?
A. Ellipse
b. Hyperbola
C. Oblate spheroid
D. Parabola

29. What is the first successful space rotation program that tested the ability of astronauts to work for long periods and studied their body responses to weightless condition?
A. Apollo 11
B. Sputnik I
C. Salyut
D. US Skylab

30. The universe is estimated to be between ten and twenty billion years old. This estimate is based on the value of which constants?
A. Speed of light
B. Hubble constant
C. Mass of the Earth
D. Mass of the electron

31. On which of the following planets would the sun rise in the west?
A. Mars
B. Jupiter
C. Saturn
D. Venus

32. Which of the following describes an albedo?
A. Brightness of the star
B. Phase changes of a planet
C. Wobbling motion of a planet
D. Amount of light a planet reflects

33. Where are most asteroids located?
A. Between Earth and Mars
B. Between Mars and Venus
C. Between Mars and Jupiter
D. Between Jupiter and Saturn

34. Which refers to the precision of the Earth?
A. Change night to day
B. Earth’ motion around the sun
C. Effect of the moon on the Earth’s orbit
D. Change in orientation of the Earth’s axis

35. What kind of eclipse do we see when the moon is entirely within the Earth’s umbra shadow?
A. Total solar
B. Total lunar
C. Partial solar
D. Partial lunar

36. At which phase of the moon do solar eclipses occur?
A. Full moon
B. First quarter
c. New moon
D. Third quarter

37. If lunar eclipse occurs tonight, when is the soonest that a solar eclipse can occur?
A. Tomorrow
B. In two weeks
C. In one month
D. In one year

38. Which one is considered as one of the most important results of the Apollo missions to the moon?
A. Discovery of subsurface of water
B. Determination of the age of moon rocks
C. First observations of surface features called craters
D. Proof that craters were produced by volcanic eruptions

39. What is the problem experienced by astronauts staying for long periods of time aboard the international space station?
A. Weight loss due to diet
B. Determined of the age of moon rocks
C. Muscle loss due to lack of exercise
D. Effects of lower gravity on the body

40. NASA development a filtration process to make waste water on space flights renewable. Where might this filtration process be used on Earth?
A. In areas where water is salty
B. In areas where water is contaminated
C. In areas where water is used for recreation
D. In areas where water contains hard minerals

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