Warm-up ( 8/28 & 8/29)

1. Warm-up (8/28 & 8/29) • Last half of your notebook OR sheet of paper “WARM-UPS #1” and YOUR NAME Put today’s date in the margin Write Questions and Answers • What is the most important safety rule? • What does a beaker look like when it is hot? • What do you think a good scientific experiment should include? SAFETY QUIZ NEXT CLASS!

2. Today • Attendance/ Seating Charts • Lab Safety • Black Boxes • Tricky Tracks • Checks Lab Dress like a nerd Friday!

3. HW • Controlled Experiment WS • Study For Safety Quiz • Flinn Contract • Appendix B – back of Bio book HomeworkWRITE THIS DOWN!

4. Overall Safety Themes • Always follow the teacher’s directions and/or the instructions of the lab • If there is a problem, always tell a teacher • Never use anything unlabeled or not designated for lab

5. Safety in this lab • Video

6. In this room

7. Never heat a liquid in a closed container No stoppers More than one test tube can be heated at a time. Stoppers are OK if there is no heat

8. Pour acid into water. PAW! Acid H2O

9. Hot water bath – used for heating volatile (easily flammable) liquids. Ø Hot plate No volatile liquids With a Bunsen burner

10. MSDS

11. Diamond Hazards

12. Scalpel hold like a pencil. Cut away from yourself and others.

13. Bacteria cultures Culture only nonpathogen bacteria. Nonpathogen means NOT disease causing All cultures must be disposed of by the teacher.

14. Pipette –precise measurement for tiny amounts Micropipette Dropper pipette – Measurement not precise

15. Graduated Cylinder Graduated cylinder – measures volume in milliliters, ml. Meniscus – Curve of liquid. Measure from the bottom of the curve.

16. Today • Objectives: • What is Science? • What is within the realm of Science? • What is the difference between an observation and an inference? • Relevance: • Our definition of Science will direct us throughout the year

17. Mystery Boxes • Each box has a vertical barrier(s) inside of it • Your job is to figure out the configuration of it • Have 1 recorder in the group to record • Any guesses • Any thought process you went through to prove (disprove) each guess • Final configuration

18. Sample configurations Hole in the middle

19. Sample configurations 3, 4 2 1, 5, 10 Hole in the middle 8, 9 6,7

20. Mystery Box • As you gather more information, explanations/answers may change. • This is how Science works! • Over the next couple of days, we are going to define what Science really is and use this definition throughout the year.

21. Before we get going, let’s take a look back

22. Black Boxes We can’t see inside, so we guess how it works based on what goes in and what comes out

24. 1 black box after another

25. 400 BC: Hippocrates and the 4 Humours • Blood, black bile, yellow bile, phlegm • Believed that sickness was caused by an imbalance in the humours • Led to blood letting and medicines that induced vomiting and bowel movements

26. Maternal Imprintation • Believed that thoughts a pregnant woman had would be transferred to her child

27. Spontaneous Generation • Believed that living organisms could arise from non-living matter

28. Led to recipes for organisms It was believed that cockroaches were formed from crumbs on the bakery floor! • Making a scorpion • Place basil between 2 bricks • Place the bricks in sunlight • Wait

29. 200AD – Galen (physician in Rome) • Knew heart pumped blood • Thought the heart irrigated the organs with • blood and made knew blood all the time • This idea was taught for 1500 years

30. 1700’s – William Harvey • Discovered blood was pumped in a continuous circuit • Calculated that it was impossible for the heart to make 540 pounds of blood that it pumps in 1 hour • Coupled logical reasoning with calculation of an unobservable activity which led to more advances in Science

31. So have we answered all of life’s big questions?

32. Perception Activity Make observations

33. Figure 7

34. Figure 5

35. Figure 6

36. Figure 7

38. Observation– something experienced through the 5 senses (Ex. There are 2 sets of tracks – 1 larger than the other) • Inference – using prior knowledge to further explain the presence of an observation (Ex. The larger track was made by a larger bird) • Different inferences can be drawn from the same observations • Inferences can become the basis of a hypothesis

39. Checks Lab • Draw 3 checks out of the envelope • Write initial hypothesis in notebook • Draw 3 more checks • Write hypothesis # 2 (should be # 2) • Draw 3 more checks • Write hypothesis # 3 • Draw out the remainder of the checks • Write a conclusion

40. Wrap-up • Some things aren’t always as they seem. • We must be careful not to classify inferences as observations. • We must frequently re-evaluate our inferences as new information comes to light.

41. DAY THREE

42. Warm-up (8/29 & 8/30) Continue Warm Ups below the last one Write QUESTION and ANSWER or RESTATE the Q • Write down one OBSERVATION you make in this classroom. • Write an INFERENCE that you make based on the above observation. • True or False: Eye glasses are acceptable as protective eye-ware in the lab.

43. HW • Science Knowledge Survey • Read Section 1-1 • Bring in supplies (esp. paper towels!)

44. Today • Safety Quiz • Checks lab wrap up • Review I/O HW • Science Sorting Activity  what IS science?

45. Safety Quiz #12: #21: Cross out Question and Mark ABCDE on Scantron #’s 22-35: T (A) or F (B) #33: Read “all chemical/ biohazardous labs” Lubricant

46. Checks Activity • Collect data from ALL checks • Final Conclusions • You will share your story with the class

47. Checks - Wrap-up • Some things aren’t always as they seem. • We must be careful not to classify inferences as observations. • We must frequently re-evaluate our inferences as new information comes to light.

48. Observation/ Inference WS

49. Activity • As a group, take the statements in the envelope and organize into groups as you see fit • Be ready to explain why you put them in the groups that you did • You have 5 minutes

50. What is Science? As a table, pick one of the statements from the last activity and justify whether or not it is science Whiteboard your rational using multiple evidences to support your claim