The Scientific method

Scientific Method Watch this short video to refresh your memory about the scientific method, then answer the questions below. Match the vocabulary words to the correct definitions. Hypothesis A testable prediction Control Group that receives the "normal" conditions Independent/ Manipulated Variable The variable that the scientist changes Dependent Variable The variable that is measured Constant A condition during the experiment that stays the same for all groups being tested Observation Using your five senses to determine information Inference Drawing a conclusion using the evidence at hand Make a prediction Make a conclusion Ask a question Gather dataWhich of the statements above is the first step of a scientific experiment? Make a prediction Ask a question Gather data Make a conclusion What is the purpose of an experiment? To communicate data To test a hypothesis To prove a scientific law None of these Sort it: For each hypothesis determine which is the dependent and which is the independent variable. A. If you increase the amount of blood in the water, then you will determine the number of sharks in the area.B. If you increase the amount of milk you drink, then you will increase the strength of your bones. Independent Variable amount of blood in water amount of milk Dependent Variable number of sharks bone strength C. How does the amount of time watching T.V. affect the reading scores of fourth graders?D. How does the length affect the distance that a paper airplane flies? Independent Variable Wing length amount of time watching TV Dependent Variable Reading scores of fourth graders paper airplane flight distance E. How does the temperature of water affect how high an ice cube floats?F. How does the type of music affect student heart rates? Independent Variable water temperture type of music Dependent Variable student heart rate how high ice cube floats Read the story below and then match the parts of the experiment to the story. Mr. Krabs created a secret ingredient for a breath mint that he thinks will "cure" the bad breath people get from eating crabby pattyies at the Krusty Krab. He asked 100 customers with a history of bad breath to try his new breath mint. He had 50 customers (Group A) eat the special breath mint after eating. The other 50 (Group B) got a regular breath mint without the special ingredient. Both groups were told that the mints would cure their bad breath. Two hours later, 30 customers in Group A and 10 in Group B reported having better breath. Independent Variable Secret Ingredient Dependent Variable Number of customers with bad breath Constant crabby patties Experiemental Group Customers who got secret ingredient mint Control Group Customers who DID NOT get special mint What is the most reasonable conclusion for Mr. Krabb's experiement? The secret ingredient DOES help with bad breath The secret ingredient DOES NOT help with bad breath The secret ingredient made bad breath WORSE.