Tuesday, July 10, 2012

Eyes here ABDevCom-1 (Nat.Sci.1) 1st online Assignment

The Earth's shape most closely resembles which of the following object
  1. a basketball
  2. a pear
  3. a ping-pong ball
  4. an apple
An observer watching a sailing ship at sea notes that the ship appears to be "sinking" as it moves away. Which statement best explains this observation?
  1. The surface of the ocean has depressions
  2. The earth has a curved surface
  3. The earth is rotating
  4. The earth is revolving
According to the Earth Science Reference Tables, the equatorial radius of the Earth is approximately
  1. 637 km
  2. 6370 km
  3. 63700 km
  4. 637000 km
At which location would an observer find the greatest force due to the Earth's gravity?
  1. North Pole
  2. New York State
  3. Tropic of Cancer (23.5N)
  4. Equator
The water sphere of the earth is known as the
  1. atmosphere
  2. troposphere
  3. lithosphere
  4. hydrosphere
Which statement provides the best evidence that the Earth has a nearly spherical shape?
  1. The sun has a spherical shape.
  2. The altitude of Polaris(N. Star) changes with the observer's latitude in the Northern Hemisphere.
  3. Star trails photographed over a period of time show a circular path.
  4. The length of noontime shadows change throughout the year.
The latitude of a point in the Northern Hemisphere may be determined by measuring the
  1. apparent diameter of Polaris
  2. altitude of Polaris
  3. distance to the Sun
  4. apparent diameter of the Sun
If the deepest parts of the ocean are about 10 kilometers and the radius of the Earth is about 6400 kilometers, the depth of the oceans would represent what percent of the the Earth's radius?
  1. less than 1%
  2. about 5%
  3. about 25%
  4. more than 75%
The true shape of the Earth is best described as a
  1. perfect sphere
  2. perfect ellipse
  3. slightly oblate sphere
  4. highly eccentric ellipse
Compared to Earth’s crust, Earth’s core is believed to be
  1. less dense, cooler, and composed of more iron
  2. less dense, hotter, and composed of less iron
  3. more dense, hotter, and composed of more iron
  4. more dense, cooler, and composed of less iron