What is an observesation?

What is the difference between laziness and tiredness? How many oxygens atoms are in 3CO2 4H2O? Which was discovered before antibiotics blood circulation electricity chromosomes or gravity? Physics define distance? What moves backwards and forwards in sound? Dr marcellius you anunobi what is his field of study? Did German Otto Von Lilienthal invented the glider? Is a scientific principle taken as absolutely true? What will a scientist do if their hypothesis turns out to be wrong? The sides of the DNA ladder are made up of alternating sugar molecules and carbohydrate groups? Is a soccer field measured in inches feet yards or miles? What kind of investigator provide large amounts of information about a wide range of variables? What are the 2 kinds of ostinato? How many eighths of an inch are in 0.787 of an inch? How can resources Eg Fossil Fuels be conserved? Are Popsicle sticks good or bad insulators? How do scientists know what the center of the earth looks like? How many miles are in 36000 kilometers? Can you give an example of an investigatory project? Is protista autotrophic or heterotrophic?