While examining layers of rock, a geologist states, “the sandstone is older than the limestone.” what has the geologist determined?

What makes water a renewable source

How would having more railroad tracks be advantageous during a war

Aresearcher is studying women recently admitted to a state prison. all potential subjects must have children under the age of five. research subjects will be given a basket of toys to use at their children’s first visit that the children can then take home. in assessing this proposal, the irb needs to determine that the toys are: age appropriate.not an excessive incentive.educational.of high quality.