One piece of evidence of eartth evidence of earths revolution around the sun is?

a. the coriolid effect

b. foucaults pedulum

c. the varying positions of a constellation over a period of hours

d. the varying positions of a constellation over a period of weeks

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory