1 / 29

M&M I n v e s t i g a t i o n

M&M I n v e s t i g a t i o n. In your journal: write the “testable question” you chose to investigate draw a picture that shows how your experiment helped to answer the question. Facts. Facts = verifiable, repeatable observations

ross
Download Presentation

M&M I n v e s t i g a t i o n

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. M&MInvestigation In your journal: • write the “testable question” you chose to investigate • draw a picture that shows how your experiment helped to answer the question

  2. Facts Facts = verifiable, repeatable observations Science demands that there be general agreement on the facts Examples: • it is a fact, (it is true) that, if I drop an M&M from the top of my desk, it will fall to the ground. This act can be repeated many times, by many individuals, with all agreeing on the result. • It is a fact that each M&M has chocolate on the inside. (I can see it). • It is a fact that the melting point of chocolate is between 860F and 900F. (I can look it up)

  3. Scientists work with facts, observations and new ideas to build a body of knowledge about the natural world.

  4. CAUSE & EFFECT Most fundamental concept of science is that of cause and effect Scientists are never satisfied with simply describing events in the natural world; they strive to show relationships between events and to explain them. A cause is why something happens and an effect is what happens because of the cause

  5. Fishbone Diagram POSSIBLE CAUSES CAUSE CAUSE M&M’s melt in my hands EFFECT

  6. What is a Hypothesis? • a guess • an educated guess • a prediction that can be tested • a tentative statement about the relationship between two or more variables • an explanation of a phenomenon that can be tested in a way which proves or disproves it • a claim about the natural world that is investigated

  7. What is a Hypothesis? • a guess • an educated guess • a prediction that can be tested • a tentative statement about the relationship between two or more variables • an explanation of a phenomenon that can be tested in a way which proves or disproves it • a claim about the natural world that is investigated

  8. Fishbone Diagram POSSIBLE CAUSES CAUSE CAUSE Moisture Body Heat Chemical Reaction M&M’s melt in my hands EFFECT Pressure Exposure to oxygen Exposure to light HYPOTHESIS:If body heat is related to M&Ms that melt in my hand, then M&Ms will melt at a temperature of 98.60F.

  9. Fishbone Diagram POSSIBLE CAUSES CAUSE CAUSE Moisture Body Heat Chemical Reaction FACT FACT FACT FACT FACT FACT FACT FACT FACT M&M’s melt in my hands FACT FACT FACT FACT FACT FACT EFFECT FACT FACT FACT Pressure Exposure to oxygen Exposure to light HYPOTHESIS:If body heat is related to M&Ms that melt in my hand, then M&Ms will melt at a temperature of 98.60F.

  10. Where do FACTS come from?

  11. My Body of Knowledge! (Make sure to carry this with you EVERY DAY!) How big is YOURbody of knowledge? By the way…

  12. Everything I Observe….

  13. FRIENDS Everything Others Tell Me…. FAMILIA TEACHERS COACHES REPORTERS CLERGY POLITICIANS DENTISTS

  14. Everything I read about….

  15. Everywhere I go….

  16. Everything I do….

  17. “Body of Knowledge”University of Frankfurt, Germany

  18. BODY HEAT FACTS HYPOTHESIS:If body heat is related to M&Ms that melt in my hand, then M&Ms will melt at a temperature of 98.60F. M&Ms melt in my hands BODY HEAT (CAUSE) My body feels warm Heat rises Heat = thermal energy M&Ms melt in my hands Chocolate melts between 860 F and 900 F EFFECT Air particles move faster when they are heated Human body temp = 98.60 F

  19. Writing a Scientific Procedure • Write the experimental procedure like a step-by-step recipe for your science experiment. A good procedure is so detailed and complete that it lets someone else duplicate your experiment exactly! Be sure to include a list of materials and the amount of each material that you will need. Remember to address any safety concerns. • Repeating a science experiment is an important step to verify that your results are consistent and not just an accident. For a typical experiment, you should plan to repeat it at least three times (more is better).

  20. Replication • Scientists aim for their experiments to be replicable — meaning that another scientist could duplicate the investigation and obtain the same basic results. • When an experiment cannot be replicated, we must question the results and conclusions drawn from the experiment.

  21. Repetition • Repetition is doing an experiment over a number of times, recording the results, and then analyzing the data using statistics to arrive at the answer with a stated error. • We repeat experiments because, no matter how hard we try, every single part of an experiment cannot be duplicated exactly, there are always some changes we can't control and we call this experimental error. • By repeating the experiment many times we can get an idea of how large all of the errors are put together. We assign a number to that total amount of error, so we know how much confidence to put into the numbers we get.

  22. Procedure Materials: small package of M&Ms Hot plate Beaker Thermometer • Open package of M&Ms and place the contents in a beaker. • Carefully place the beaker on a hot plate. • Place a heat-resistant thermometer in the beaker. • Heat until the M&Ms until they melt. • Observe and record the temperature at which point the M&Ms melt. • Repeat steps 1- 5 three times.

  23. Fishbone Diagram POSSIBLE CAUSES CAUSE CAUSE Diet coke floats; coke does not EFFECT HYPOTHESIS:

  24. Peer-Review

  25. Peer- Review Check List for Procedures • List of materials and amount of each material is provided. • Each step of procedure is numbered. • Procedures are detailed and written clearly so that anyone can duplicate the experiment exactly. (REPLICATION) • Includes instructions to repeat the experiment at least 3 times. (REPETITION) • Any safety concerns are addressed. • The procedures test the cause-effect relationship that is proposed in the hypothesis/claim.

  26. Do you think the procedures below would pass a peer-review? Why or Why not? Procedure HYPOTHESIS:If body heat is related to M&Ms that melt in my hand, then M&Ms will melt at a temperature of 98.60F. Materials: small package of M&Ms Hot plate Beaker Thermometer • Open package of M&Ms and place the contents in a beaker. • Carefully place the beaker on a hot plate. • Place a heat-resistant thermometer in the beaker. • Heat until the M&Ms until they melt. • Observe and record the temperature at which point the M&Ms melt. • Repeat steps 1- 5 three times.

  27. Isn’t an accepted fact that the melting point of chocolate is between 860 F and 900 F? Will this investigation add to our body of knowledge? Should I assume this means “one” hot plate? Procedure Will this be enough M&Ms to repeat the procedure three times? HYPOTHESIS:If body heat is related to M&Ms that melt in my hand, then M&Ms will melt at a temperature of 98.60F. Materials: small package of M&Ms Hot plate Beaker Thermometer • Open package of M&Ms and place the contents in a beaker. • Carefully place the beaker on a hot plate. • Place a heat-resistant thermometer in the beaker. • Heat until the M&Ms until they melt. • Observe and record the temperature at which point the M&Ms melt. • Repeat steps 1- 5 three times. The procedures say the thermometer should be heat-resistant. Safety concerns! Is the beaker emptied after each trial?

More Related