According to the nebular theory for the formation of the solar system, a. planet

Question

According to the nebular theory for the formation of the solar system,

a. planets can be rotating in any random direction compared to the direction they orbit the Sun

b. no prediction is made as to the directions of rotations of the planets

c. planets should be rotating in the same direction as they orbit the Sun

d. planets should be rotating in the opposite direction to the direction they orbit the Sun

QUESTION 7 Which of the following is not a general difference between a planet and a star?

a. Planets are made of rock and stars are made of gas.

b. Planets orbit stars, and stars orbit the center of the galaxy.

c. Planets are dimmer than stars.

d. Planets are smaller than stars.

QUESTION 8 Suppose we make a scale model of our solar system, with the Sun the size of a grapefruit. Which of the following best describes the planets in this model?

a. The planets are all much smaller than the Sun. Four planets are located within a few centimeters of the Sun, and four planets are located at distances ranging up to about a meter.

b. The planets are all much smaller than the Sun. Four planets are within about 20 meters of the Sun, and the rest of the planets are spread much farther apart.

c. The planets range in size from about the size of a marble to the size of a baseball. They are spread out over a region about the size of a football field.
d. The planets are all much smaller than the Sun and are spread out evenly over a distance about the length of a large classroom.

QUESTION 9 The idea that the universe began in a Big Bang is now well-supported by evidence but initially arose as a logical inference based on the fact that ________.

a. the chemical composition of the universe consists mostly of hydrogen and helium

b. the universe is expanding

c. the farther away we look into space, the further back we look into time

d. stars orbit around the centers of their galaxies

QUESTION 10 The fact that the elements of life were produced in stars suggests the following two things:

a. (1) The universe began in a Big Bang. (2) The elements of life exist in all stars.

b. (1) These elements have become more common as the universe has grown older. (2) These elements are the most common elements in the universe.

c. (1) These elements have become more common as the universe has grown older. (2) These elements should be found in nearly all star systems.

d. (1) These elements only exist in very old stars. (2) These elements are extremely rare.

QUESTION 11 The age of Earth is about ________ the age of the universe

. a. one-third of

b. 10% of

c. 1% of

d. equal to

QUESTION 12 Vaporization is the process in which ___________.

a. molecules go from the solid phase to the liquid phase

b. electrons are stripped from atoms

c. molecules go from the liquid or solid phase to the gas phase

d. molecules go from the liquid phase to the solid phase

Explanation / Answer

6) Option C is correct.

Planets should be rotating in the same direction as they orbit the Sun.

In the Nebular Hypothesis for the formation and evolution of solar system, planets should be rotating in the same direction as they orbit the Sun.

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