2) features of the ocean floor; 3) the concept of sea-floor spreading; and. 4) the nature of the Earth's magnetic field and the fact that it has reversed its polarity many times in the past. The Earth's layers â The Earth is a layered planet consisting of crust, mantle and core (Fig. 1).
Run your sprinklers for 15 minutes. Use a ruler to measure the depth of water in each can. Add all the numbers, and then divide by the number of cans to find the average output. This average number is your sprinkler number. It is the average amount of water your sprinklers apply in 15 minutes.
Four Easy Steps To See How Long It Takes Your Sprinkler To Water An Inch: 1  Place two Consortium watering gauges at two different places within your sprinklerâs spray range. 2  Find the average amount of water (in inches) collected in your gauges. 3  Use this chart to see how much time it will take you to water one inch. 4  Set your base schedule.