In your garden plot on the island of hawaii, you have carefully planted ten different species of crops, all of which mature at different times. some are tall, some are shorter. some take nutrients from the soil. some return nutrients. some crops are used for food; others for fuel or medicine. you are practicing

Which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

What is the mercury length of time for one revolution around the sun?

The dashed segment of the plotted experiment in the graph in the lesson is called an