Earth Science - January 2010

 6 If the average distance between Earth and the Sun were doubled, what changes would occur in
the Sun’s gravitational pull on Earth and Earth’s period of revolution?

(1) Gravitational pull would decrease and period of revolution would increase.
(2) Gravitational pull would decrease and period of revolution would decrease.
(3) Gravitational pull would increase and period of revolution would increase.
(4) Gravitational pull would increase and period of revolution would decrease.

7 The Foucault pendulum provides evidence of Earth’s

(1) revolution around the Sun in a geocentric solar system
(2) revolution around the Sun in a heliocentric solar system
(3) rotation on its axis in a geocentric solar system
(4) rotation on its axis in a heliocentric solar system

8 The first S-wave arrived at a seismograph station 11 minutes after an earthquake occurred. How
long after the arrival of the first P-wave did this first S-wave arrive?

(1) 3 min 15 s    (3) 6 min 05 s
(2) 4 min 55 s    (4) 9 min 00 s

9 An air mass classified as cT usually forms over which type of Earth surface?

(1) cool water    (3) warm water
(2) cool land      (4) warm land

10 What is the dewpoint when the dry-bulb temperature is 24C and the wet-bulb temperature is 21C?

(1) 16C     (3) 20C
(2) 18C     (4) 21C

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