What is laeching?

A feather and a rock dropped at the same time from the same height would land at the same time when dropped by? What do you needs in a explanation text? What is example of skimming? 18cm equals how many millimeters? How many climate zones does south America have? How are Triscuits made? What is the author's interest or concern? Are scientific observations objective and why? What equals 16 tablespoons? What system is used to do science inquiry? How many 500ml of water make a liter? How good are Crystal Damp traps? What are the decibel levels for the hearing impairment classifications? Is conserving good or bad? What does work depend on in scientific terms? When heating water in the test tube why you should point the opening away from yourself and others? What is 37.7 celsiusn in Fahrenheit? Rank from largest to smallest the bodies in space that reflect light? A scientific theory is best defined as? Why do some objects feel colder than others at room temperature?