Wednesday, 27 February 2019

Earth Science Olympiad - Previous Questions 7

Earth Science Olympiad - Previous Questions 7



1. Which of the following minerals is most suited for U-Pb dating?
Quartz
Feldspar
Zircon
Topaz

2. Which of the following minerals is a major constituent of marble?
Serpentine
quartz
feldspar
calcite

3. Which of the following is an aluminum ore?
Bauxite
Hematite
Ilmenite
Rutile

4. Which of the following mineral is a major constituent of china clay?
Leucite
Kaolinite
Anorthite
Olivine

5. Seasons on Earth occur because of:
Disproportionate distribution of land mass in northern and southern hemispheres
Tilt of the Earth's axis of rotation
Changes in the specific heat of water and land mass and the wind circulation that is a consequence of the changes in the temperature
Changes in the circulation and transport of greenhouse gases

6. Which is the third most abundant gas in the atmosphere
Nitrogen
Water vapour
Argon
Carbon dioxide

7. How many total number of air molecules in one cubic meter of air
2.6 x 1019
2.6 x 1021
2.6 x 1023
2.6 x 1025

8. What is the average scale height of air
8 cm
8 m
8 km
80 km

9. Which is the most important natural greenhouse gas in the atmosphere
Oxygen
Water vapour
Carbon dioxide
Ozone

10. Scale height is
the height at which the density of the atmosphere decreases by 1/2
the height at which the height of the atmosphere decreases by 1/e
the height at which the pressure of the atmosphere decreases by 1/e
the height at which the density of the atmosphere decreases by 1/e

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