1 / 20

Scientific Method and SI units

Scientific Method and SI units.

tori
Télécharger la présentation

Scientific Method and SI units

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Scientific Method and SI units

  2. In science, it is an organizational tool that takes the form of a series of procedures. There are six parts to the scientific method. The steps are statetheproblem, gather information, formahypothesis, performanexperiment, analyze data and report results.

  3. To start the scientific method, a scientist has to observe something that they know nothing about. What does it mean to observe something? What are you using to make these observations?

  4. After the observation is made, the scientist decides that he would like to test a question that he has based on his observation. The scientist is going to statetheproblem. The problem is stated in the form of a question. Lets think of a problem that we can state, that can be tested in an experiment.

  5. Next the scientist begins to gather information about the problem so that they can understand the problem a little more. Why is it so important for a scientist to gather information before testing the problem they came up with? Where can we find information about our problem?

  6. Once they have information on the problem, the scientist is going to come up with a hypothesis. A hypothesis is a prediction that can be tested. A hypothesis is also considered an educated guess. Why do you think that is? A hypothesis has to always be something that you can test. A hypothesis is stated in an “If…then…” format. Lets write out a hypothesis for our problem.

  7. Next the scientists has to performanexperiment. There are some steps that need to be followed that use controlled conditions. There are going to be 2 groups that are tested in every experiment. One is the variable group. This group is the factor that the scientist is testing for in the experiment. What does this mean?

  8. The other group is the control group. This group is the standard used to compare with the outcome of a test. What does this mean? The control group is going to have all the same things happening to it as the variable group (experimental group) except for the one factor that you are testing to solve the problem.

  9. The next step is for the scientist is to analyze the data that he collected. The scientist will look at all the data that was collected in the experiment and come up with an answer to the problem. This answer will either prove that the hypothesis is true or false. Why is this step important in the scientific method?

  10. The last step in the scientific method is to report results. After the scientist has looked at all the data, he or she will tell other scientists about the results of his or her experiment. This will either be written in a scientific paper or presented to other scientists. Why would a scientist want to share his or her findings?

  11. The answers to a scientist’s problems can either be considered a scientific theory or a scientific law after it is tested multiple times. A scientific theory is an explanation of things or events based on many observations. This means that many experiments had to come to the same conclusion. Scientific theories can be changed if new data is found that shows that it is false. What are some examples of famous scientific theories?

  12. A scientific law is based on repeating data that tells us how nature works. Experiments have all had the same conclusions many, many times. A law can also be changed but not as easily as a theory. Can you name some famous scientific laws?

  13. Scientists use a system called an SI (International System of Units) to measure things. This chart will show you some of the SI units and will help you to convert one unit to another.

  14. Prefixes Meaning kilo- One thousand (1000) hecto- One hundred (100) deca- Ten (10) deci- One-tenth (0.1) centi- One-hundredth (0.01) milli- One-thousandth (0.001)

  15. 1000 millimeters (mm) 1 meter (m) 100 centimeters (cm) 1 meter (m) 10 decimeters (dm) 1 meter (m) 10 millimeters (mm) 1 centimeter (cm) 1000 meters (m) 1 kilometer (km) SI metric units of Length:

  16. What is the formula for area? Area = Length x Width

  17. We measure mass in grams. We will learn how to use a triple beam balance at another time. When measuring volume of a liquid we are going to use a graduated cylinder. How do you know how much of the liquid you have? You look at the liquid in the graduate cylinder at eye level. You read the level that the liquid is at the meniscus, which is a curve at the surface of a liquid. This will only happen in glass graduated cylinders. You will not see one when you use a plastic one.

  18. When you are trying to find the volume of an object that is cube like, you are going to get the measurements of the length, width and height of the cube. The formula for volume is: Volume = length x width x height

  19. Kelvin Fahrenheit Celsius Boiling point of water 100 C Human body temperature Freezing point of water 32 F 0 C Absolute zero -273.15 C Temperature can be measured in 3 different scales. They are Kelvin, Fahrenheit and Celsius. 373 K 212 F 310 K 98.6 F 37 C 273 K -459.67 F 0 K

  20. The End

More Related