Is non-participant observation qualative or quantative?

What is the difference between natural and artificial radioactive nuclides? Do you inherit the ability to flare your nostrils? How many Number of miles in 126 acres? The most common volcanic emission even from dormant volcanoes? What two elements do you use everyday? Do tomatoes have taproots or fibrous roots? What evidence did Neil's Bohr provide about the structure of an atom? How many lumens in a 1141 bulb? What are the male erogenous zones? Name the nitrogen fixing plants that are used as rotation crops? If the electron in a hydrogen atom obeyed classical mechanics instead of quantum mechanics would it emit a continuous spectrum or a line spectrum? Does ADH promotes dehydration? How do dipole a dipole forces affect the melting and boiling points of substances? What elements are found in a high proportion in Earths crust? Which is better helium or argon? Is DNA a component of the chloroplast? How can you tell if your pet has lyme disease? What two towns in Nevada are on the mountain time zone? What was the importance of the discovery that molten rock was coming out of the mid ocean ridge? Why do balloons filled with air drop down?