About of the population of the us and canada lives in urban areas. a. 80% b. 60% c. 40% d. 20%

As water is cooled from 4 c to 0 c its density

Following lenin’s death, who took control of the soviet union

Select all that apply the earth orbits the sun because a. the earth is in motion therefore stays in motion b. the suns gravity pulls the earth in a curved path c. a contact force is pushing the earth