What the disphrag?

When do people wear the colored lab coats? What make scientific method reliable? Is soil a renewable resources? If the North Sea gas is invisible how can you tell when gas is leaking? What would life be without the wheel? What is the best time of day to vacuum? Does scientific inquiry often begin by drawing a conclusion? How many centimeters are there in one sixty-fourth of an inch? Who must eventually be tested to research science that affects the well being of humans? How is the meniscus used in measuring the volume of liquids? How much work was done to move a 10 N book 5 meters? What are formula units? How many meters in a 40 foot pool? Why do scienst need to communicate with each other? How far is one half mile in yards? Why does the sky appear grey in industrial areas? 2 percent of a gram equals how many milligrams? What can't solids not do? In a scientific experiment a blank is any factor that can change or be changed? 1 cup conversion?