The United States Census collects data on many variables about individuals and households. Which variable below would be classi ed as categorical? A. Family size B. Hours worked per week C. Type of residence D. Monthly mortgage

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.