What is a petronom?

Is a eraser a common noun? What happens if the experiment dose not confirm hypothesis? Is osmosis active or a passive transport? What is two or more forces that act on an object and do not cancel each other? How many dl is 100ml? How does ice float on top of water? What does the embryo contain? What is the correct sequence of steps used in the scientific method? Why did NASA develop cordless power tools? How do you Convert 12.5 mva to kva? How can the Law of Conservation of Mass apply to a burning log? What theory did this scientist provide evidence for? Is cotton wood tree a good wood to burn in a wood stove? What are the examples of miscellaneous tools? What can bring families closer together? Is a well cooked steak chemical or physical change? Why we must turn off the electricity during an earthquake? How much does 37 kilograms weigh in pounds? When a police officer uses radar for speed control the officer is using what kind of electromagnetic waves? Definitions of sub atomic particles?