What is the scientific name off a ruler?

What is conclusion validity? How might the death of all producers in a community affect the carbon and oxygen cycles? What are symbolic interactionists looking for when they view modern society? What does procedure mean in a science fair project? What does study involve? What is meaning of using one or more of your senses to gather information? Using knowledge and thinking skills to decide if you agree with an explanation? Who collects evidence at crime scenes in RI? What is the name for the stress that stretches rock so that it becomes thinner? What does drizzle mean? A women with a waist measurement of 30 inches and a BMI of 21 is considered? What is the opposite of serf? What is the synonym of scattered? How did Charles fourier and Henri de saint-Simon try to correct the ills of industrialization? What you call a scientist in Hindi? A sentence with fatigue in it? FMA is the formula for which of Newton's Laws? General term referring to anything that occupies space and has mass? What is the area of a rectangle 3 centimeters by 10 centimeters? What would I need to know before going into a steam room?