Scientific law cannot be experimentally disproved, Scientific theory is required to be challenged, to attempt to be disproved. 3. Is it possible for a scientific theory to become a law? Why or why not? Yes, if the theory proves to work every single time, it can become a law. Observations, Analogies, and Inferences Remember observations are the actual data that are recorded during an investigation, analogies are comparisons of what is already known and what was observed or found, and inferences are the assumptions based on the observed facts that they have gathered.
Identify each as an observation (O), analogy (A), or inference (l). _ O _ 1. Mary discovered that the cell membrane of a bacteria acts like a fence because it keeps some things in and other things out. I_ 2. Mary walked into the room where her little son was playing, found a broken window, and thought immediately that her son had broken it. A _ 3. Mary noticed that the countertops was warm to the touch. I _ 4. Mary noticed that the side walk was wet and thought that it may have been that the sprinklers had been on recently. O_ 5. Mary counted and recorded 20 heart beats in 10 seconds. 6. The lecturer compared the human eyetooth a camera. Steps of the Scientific Method List the 5 basic steps of the Scientific Method in order: 1. Ask a question 2. Form a hypotheses 3. Design and conduct a experiment 4. Analyze the results of the experiment 5. Draw a conclusion Use the Lesson Introduction pages, and the Resource pages – Pre- Experimental, Experimental, and Post Experimental Stages – to complete the following: 1. If you asked Professor P. What two skills would be at the top of his list when thinking about “doing science” using the scientific method?
Safety and making sure you record data 2. Why is it important that the scientific method not be a rigid set of rules, but rather a guide to how we investigate questions? If the scientific method was a rigid set of rules some things would not be able to be tested. 3. Complete this sentence: A direction or focus. Hypotheses gives an investigation a specific 4. As researchers begin their study, they must examine what they already know about their topic of investigation. Then based on that information, they form a hypothesis.
The hypothesis is a about what the searcher thinks is going to happen in the experiment. Educated guess 5. Why is it important to write a hypothesis in an “If this … , then that… ” Format? It could get confusing if it isn’t. 6. If a scientist weren’t present to observe an event, but they gathered all the data and information they can about the event, and then based on the data they have, they tell us “what they believed” happened. This is making an inference 7. When we conduct and experiment, the condition we are investigating, the one thing we want to know about is called the Result .
The group of experimental subjects which is left “natural” or left unchanged is called the group and is used as a at the end of the experiment to see if changing the variable caused any differences between the two groups. Constant base 9. The group of experimental subjects which has the one condition changed is the group. This is the group in which you would expect to see something “happening’ because the variable is being changed. Variable 10.