Warm Up 9/6/13 Turn in day! You should have 6!

1. Warm Up 9/6/13Turn in day! You should have 6! What happens to a solid object with a density that is less than water when it is placed in water? • The object sinks about halfway into the water. • The object displaces a quantity of water greater than its volume. • The object settles to the bottom of the water. • The object floats on top of the water.

2. Warm Up 9/6/13Turn in day! Don’t forget your name! What happens to a solid object with a density that is less than water when it is placed in water? • The object sinks about halfway into the water. • The object displaces a quantity of water greater than its volume. • The object settles to the bottom of the water. • The object floats on top of the water.

4. Enrichment & Remediation Remediation: 79 or lower on test All others (blue is must-do, green is choice): • Review missed problems • Finish Explosions reading activity • Finish Double-Bubble Map • Fix P.O.E. (make sure you have at least 2: Ice melting & Alka-Seltzer tablet) • Skills Tutor (will be assigned) • Science Games • Silent Reading

5. Warm Up 9/6/13Turn in day! You should have 5! A controlled experiment • is not always possible. • contains a test group. • has only one variable. • All of the above

6. Warm Up 9/6/13Turn in day! Don’t forget your name! A controlled experiment • is not always possible. • contains a test group. • has only one variable. • All of the above

7. Today’s Work Session • 3-2-1 Reflection • Finish Circle Map (poster or individual) • Finish Science World assignment • Work on Testable Questions (complete the first assignment if you don’t know how to do the other two)

8. 3-2-1 TOTD • Three things you know about scientific methods • Two questions you still have about this topic • One question you would like to answer in a scientific investigation (it needs to be something you are interested in and can do – you are going to use this question for other assignments)

9. Poster descriptive comparative experimental

10. Lunch Line Expectations • Line up SILENTLY • Line up in a SINGLE FILE LINE • Line up and KEEP YOUR HANDS & FEET TO YOURSELF • There AND back • If you can’t handle this, then you will have ASSIGNED SEATS at lunch

11. Test Today • Use the first ten minutes of class to ask questions and review • You can write on the test • After the test, read the article on explosions and complete the guided reading worksheet • If you finish all of that, you can read or work on something for another class

12. Quiz Today • Use the first ten minutes of class to ask questions and review • You can write on the quiz • After the quiz you need to work on your Science World assignment • If you are finished with that, you can read or work on something for another class • 2nd & 4th – we will finish posters tomorrow

13. Warm Up 9/4/13 Which of the following is NOT the result of a chemical change? • soured milk • ground flour • rusted metal • digested food

14. Warm Up 9/4/13 Which of the following is NOT the result of a chemical change? • soured milk • ground flour • rusted metal • digested food

15. Agenda & Homework • Brain Pop – The pH Scale • Ch-ch-changes Demos & Hands-On • 3-2-1 TOTD • Homework: Study for TEST tomorrow

16. Test Tomorrow • States of Matter – solid, liquid, gas, plasma (volume, shape, molecules) • Changes of State – melting, freezing, vaporization, condensation, sublimation (what changes happen when adding or taking away energy) • Physical & Chemical Properties & Changes – examples of each, how to tell them apart • All returned work, Ch. 2.2, 2.3, 3.1, 3.3

17. Predict, Observe, Explain • What do you think will happen? • Make observations – note color changes, bubbling/fizzing, heat/light, formation of new substances, changes of state/shape/form • Explain – physical or chemical? Why?

18. 3-2-1 Ticket Out The Door • Three things you have learned about changes • Two questions you still have • One most interesting change you observed today

19. Warm Up 9/4/13 The scientific process begins with asking questions and • making observations. • reading background. • planning experiments. • answering them.

20. Warm Up 9/4/13 The scientific process begins with asking questions and • making observations. • reading background. • planning experiments. • answering them.

21. Agenda & Homework • Circle Map & Paragraph • 3-2-1 TOTD • Homework – study for tomorrow’s quiz • Know the 3 types of investigations • Know parts of the scientific method (hypothesis, independent & dependent variables, data, conclusion) • Know the difference between qualitative and quantitative

22. Warm Up 9/3/13 What is the best way to tell if a chemical change has taken place? • The matter changes color. • The change is reversible. • A mixture separates into layers. • The composition changes.

23. Warm Up 9/3/13 What is the best way to tell if a chemical change has taken place? • The matter changes color. • The change is reversible. • A mixture separates into layers. • The composition changes.

24. Agenda & Homework • Notes on physical & chemical changes • Card Sort (copy correct answers into notebook) • Double Bubble – compare & contrast physical and chemical CHANGES • Ticket Out The Door • Homework: complete Double Bubble & TOTD if not finished in class

25. Physical and Chemical Changes • Properties are what a substance HAS; changes are what a substance DOES • In other words: properties tend to be adjectives and descriptive; changes tend to be verbs and active

26. Evidence • Signs of a physical change include changes in state, shape, or form but not composition • Physical changes are USUALLY reversible • Sign of a chemical change include the release of light or heat • The substance may look very different • Chemical changes are USUALLY irreversible • Bubbling & color change can be tricky

27. You try it! • Name That Change • Card Sort – once you have the correct info, copy into your notebook • On a clean page, create a Double Bubble Map comparing & contrasting the two changes • Remember: similarities in the middle, differences on the outside, and for every point, you need a counterpoint

28. Warm Up 9/3/13 Which of the following is a good way to analyze data? • Organize it into charts and graphs, and do calculations if necessary. • Check it over, and then copy it. • Put it away for a few months to see if it makes more sense later. • Try to find some way to make it support your hypothesis.

29. Warm Up 9/3/13 Which of the following is a good way to analyze data? • Organize it into charts and graphs, and do calculations if necessary. • Check it over, and then copy it. • Put it away for a few months to see if it makes more sense later. • Try to find some way to make it support your hypothesis. NEVER!!!

30. Agenda & Homework • Notes: Drawing a Conclusion (2nd period needs to catch-up on other notes) • Video: Scientific Methods (complete graphic organizer) • Poster: 3 Circle Maps (descriptive, comparative, experimental) & a paragraph • TOTD: 3-2-1 • Homework: Scientific Method worksheet

31. Drawing Conclusions • Ask yourself: Do the data support my hypothesis? Did what I think would happen, happen? • Yes? You or others may want to try again to verify the results • No? Check for errors and try again • Still no? You may have to rethink or reject your hypothesis

32. Warm Up 8/30/13*NOT a turn in day A chemical change takes place during a laboratory investigation of the properties of magnesium. Which of the following may have been observed? • Magnesium burns in the presence of oxygen. • Magnesium melts at 649°C. • Magnesium becomes malleable when it is heated. • Magnesium conducts an electric current.

33. Warm Up 8/30/13*NOT a turn in day A chemical change takes place during a laboratory investigation of the properties of magnesium. Which of the following may have been observed? • Magnesium burns in the presence of oxygen. • Magnesium melts at 649°C. • Magnesium becomes malleable when it is heated. • Magnesium conducts an electric current.

34. Project Turn-In • Make sure sheet is COMPLETE! • Don’t forget to complete the section about your process! • Make sure your name is on your bottle.

35. Warm Up 8/30/13*NOT a turn-in day • Complete the “Pretest” side of the graphic organizer packet • You have 2 CRCT questions – save them in a safe place to add to next week’s set. • Process Skills project due dates pushed up • Quiz on the scientific method next WEDNESDAY • Short Observations video

36. Recording and Presenting DataScience Book pages 766-767 & 770-772 • Important to keep accurate records • Record independent and dependent variables • DRY MIX (dependent/responding Y-axis, manipulated/independent X-axis • Pie chart – parts to a whole • Line graph – trends over time, continuous change • Bar Graph – non-continuous change

37. Warm Up 8/27/13 Which of the following statements about chemical properties is true? • They can be observed when the identity of a substance changes. • They can always be observed without changing the identity of a substance. • They are easier to observe than physical properties. • They are the properties that are most useful in identifying a substance.

38. Warm Up 8/27/13 Which of the following statements about chemical properties is true? • They can be observed when the identity of a substance changes. • They can always be observed without changing the identity of a substance. • They are easier to observe than physical properties. • They are the properties that are most useful in identifying a substance.

39. Agenda & Homework • Review homework • Dunkin’ For Density Lab • Homework: study for tomorrow’s quiz (chapter 2.2 & 2.3 – check out Study Jams & Brain Pop, too)! • Work on At-Home Science

40. Dunkin’ For Density • Make a film canister float, suspend, and sink • Must have SOMETHING in the canister • Find MASS on the balance • Find VOLUME using displacement (see page 40 in science book) • Calculate DENSITY • Complete lab sheet (work with a group, but each person must turn in his/her own sheet)

41. Volume by Displacement • Fill a graduated cylinder to a known amount (example: 100 ml) • Put your object in the cylinder (film canisters must be filled with water) • Record the new height of the water (example: 137 ml) • Subtract to find volume (example: 137 – 100 = 37 ml)

42. Warm Up 8/27/13 Before asking questions, what is a scientist likely to do? • make answers that work • make necessary arrangements • make observations • make reservations

43. Warm Up 8/27/13 Before asking questions, what is a scientist likely to do? • make answers that work • make necessary arrangements • make observations • make reservations

44. Agenda & Homework • Observation & Inference Notes • Choice 1: work on Science World assignment (due Friday) • Choice 2: work on Science Process Skills mini-projects (first one due Friday) • Choice 3: finish Skills Tutor pretests • Homework: catch up on work (especially online – if you don’t have a computer, then work on the offline work at home)

45. Observation & Inference modified by Liz LaRosa www.middleschoolscience.com 2009, from original posted at:www.science-class.net/PowerPoints/Observation_Inference_8th.ppt

46. Observations • Any information collected with the senses. • Quantitative – measureable or countable • 3 meters long • 4 marbles • 50 kilograms • 35 degrees Celsius • Qualitative – describable, not measureable • red flowers • smells like fresh baked cookies • Tastes bitter • The skill of describing scientific events

47. Inference • Conclusions or deductions based on observations. • The process of drawing a conclusion from given evidence. • Using what you KNOW together with what you SEE to make an EXPLANATION or PREDICTION Practice: • Observations: • I hear people screaming • I smell cotton candy, popcorn, and hamburgers • I see a lot of people • Inference = ?

48. Look at these two sets of animal tracks. List 3 OBSERVATIONS Make an INFERENCE

49. Now what do you think? Make 3 OBSERVATIONS Make an INFERENCE

50. Now what do you think? Make 3 OBSERVATIONS Make an INFERENCE