The difference in the color and consistency of different types of crayons and pastels is due to:

A. the use of different binders. the use of liquid pigmentation.
B. the fact that these media do not need a binding agent.
C. the fact that crayons are made for children, while pastels are made for artists.
D. None of these answers are correct; there is no difference.

A. the use of different binders. the use of liquid pigmentation.

Explanation:

The main difference between crayons and cakes is that they result from the use of different materials. Although both use wax and pigments, the binder changes.

In wax crayons, the binder used is paraffin wax. And in the case of pastels, the binder is a mix of oil and wax with liquid texture.

in this case, the correct answer is A. the use of different binders. the use of liquid pigmentation.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).