A mollusk fossil is found in rock layer 3 and a leaf imprint is found in rock layer 1. Which of the following statements is
true?

The leaf imprint is older than the mollusk fossil

The leaf imprint is younger than the mollusk fossil

The leaf imprint is the same age as the mollusk fossil

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

Will mark brainliest how many electrons can be held in the energy level n = 4?