Caregivers should begin to offer babies objects to hold when the babies are approximately old.
a. one month
b. four months
c. three months
d. two months

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

Which is not true about oxygen-17 and oxygen-18?

Ways that industry and agriculture use physical properties to separate substances