In 1875 the United States solidified its commitment to the development of the internationally recognized metric system by becoming one of the original seventeen signatory nations to the Metre Convention, also known as the Treaty of the Metre.
B. Physical Map.
Physical maps show important things like mountains, rivers and lakes
B. Because In the social contract rousseau argues that laws are binding only when they are supported by the general will of the people
According to researcher Daniel Stern, at about 18 months children begin to develop a sense of self-awareness, including recognizing themselves in front of a mirror, their use of labels for "self" and empathic acts. He says that:
"Prior to the age of eighteen months, infants do not seem to know that what they are seeing in a mirror is their own reflection. After eighteen months, they do. This can be shown by surreptitiously marking infants’ faces with rouge, so that they are unaware that the mark has been placed. When younger infants see their reflections, they point to the mirror and not to themselves. After the age of eighteen months or so, they touch the rouge on their own faces instead of just pointing to the mirror" (<em>The Interpersonal World of the Infant</em>, 1985, p. 165).
Water, shelter (build out of tress), fire (rocks and sticks)
