This or That

2. This or That

3. Energy

4. Change

5. Scientific Method

6. Vocab

7. Grab Bag

8. This or That Energy Change Scientific Method Vocab Grab Bag $100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 $500

9. Physical or Chemical Property? Odor

10. Odor is a physical property. • You can observe it without the presence of a chemical reaction. • You can smell coffee without observing a chemical reaction.

11. Pure substance or Mixture? 24K gold

12. Pure substance 24K indicates all gold atoms Any other carat is an alloy (14K)

13. 0K or 0°C Which is colder?

14. Zero Kelvin,that’s absolute zero

15. Homogeneous or Heterogeneous Mixture 5% vinegar solution?

16. Homogeneous Mixture You can only see one phase (uniform composition)

17. Cp tin=.228J/g°C Cp copper=.388J/g°C Which contains more heat: 1g of tin heated 1 degree or 1g of copper heated 1 degree?

18. Copper If the temperature raised a degree it must have absorbed .388J

19. State the Law of Conservation of Energy.

20. Energy cannot be created or destroyed, only transferred.

21. Name at least 5 types of energy.

22. Chemical Nuclear Kinetic Potential Sound Solar Electrical Light Heat

23. Endothermic orExothermic • Baking bread?

24. Baking bread is anendothermic reaction • Energy is absorbed into the bread. • Energy is needed for the “rising” to occur.

25. The energy given off when bonds are broken is an example of __________.

26. Chemical Energy

27. Which particle model has more kinetic energy? a. b. Which is an element?

28. There is less order so this one has more K.E. This is the element.

29. Briefly describe the heat transfer when someone gets into a cold swimming pool.

30. Heat from your body is transferredinto the colder pool. Cold is NOT transferred to your body.

31. Chemical or physical change Dissolving sugar?

32. Physical change No change in composition occurs

33. Exothermic or Endothermic? Condensation

34. Exothermic Condensation is gas to liquid… there is less energy in a liquid than a gas, so energy must have been released.

35. One base unit is the meter.Give an example of a modified base unit.

36. Any base unit with ametric prefix.Ex. Millimeter,mm

37. Mute before playing This type of change indicates a chemical reaction. What is it? *note-movie is off the top of the screen to hide the answer.

38. A precipitate $200 for color change answer only

39. An inactive sugar pillis a ____________. It helps determine whether the subjects mind was the independent variable

40. placebo

41. In this type of experiment, it is unknown to the researcher whether the subject is receiving a placebo or an active drug.

42. A double-blind experiment

43. Sleep studies were done on women who were having nightmares. It was found that they were all eating Ben and Jerry’s Ice Cream 10 minutes before bed. What is the dependent variable?

44. The occurrence of nightmares The IV effects the DV.

45. Researchers found a correlationbetween males age 15-24 and high death rates.What variable wouldbe changed for thecontrol group?

46. Either: Males above age 24 Females age 15-24

47. Males age 15-24 tend to have higher mortality rates due totheir risky behaviors. Name 3 other variables thatwould affect the dependentvariable.

48. Distance traveled to school/work,parents, type of food they eat, genetics, disease, bad luck

49. Explain the differencebetween massand weight.

50. Mass is the amount of matter. Weight is the force produced by gravity acting on mass.