Do all investigation have to have a hypothesis?

What is the derivation of the word fossil? Who is seshat? What is a 4 burner incineratorCan it be used for general purposes? What is a rubber bung use for in science? What are the names of the different types of mazes? Sally Rides sister's name? What are three types of chemical reactions? Is a metric ton bigger than a gram? How does the scientific process generlly begin? Which process does not add salts to seawater? Which elements has 3 electrons in its outermost shell? What did the broom and the mop say when the janitor opened the closet door? Who comes first O'mally or Omaan? How long has the longest tornado lasted? Does a guy get wet? How much in kilos is 2 pound? What are things sound can tell you? What does the abbreviation GSR refer to in forensic science? What is Nikola Tesla family background? What size button hole is needed for a button with a circumference of 7.38 centimeters use the value of 3.14 to represent pi?