1. Bell Ringer Identify the variables…. Barry wants to know if the type of batteries will affect how well a circuit works. He uses four different batteries. He hooks each type of battery up to a wire and a light bulb in a circuit. He measures the brightness of the light given off by the light bulb.

2. Unit 1 Test Review

3. 1.What is an Observation?

4. 2.What is an Inference?

5. 3. Is the following an Observation or an Inference: The sky is very dark and cloudy.

6. Is the following an Observation or an Inference: It will rain soon.

7. Define Qualitative Observation

8. Define Quantitative Observation:

9. Is the following a Qualitative or Quantitative Observation: This room is really small.

10. What is the purpose of an experiment?

11. What should your first step be using the Scientific Method?

12. Name the 3 variables that must be present in a scientific experiment:

13. Define Independent Variable

14. What is a Control Group?

15. Define Dependent Variable

16. What is a constant?

17. Identify the variables Bart believes that mice exposed to radiowaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice near a radio for 5 hours. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. he found that 8 out of 10 of the radiowaved mice were able to push the block away. 7 out of 10 of the other mice were able to do the same.

18. Identify the variables Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.

19. Identify the Variables A scientist wants to investigate whether plants need sunlight to grow. The hypothesis being tested is: “Plants require sunlight to grow.” The scientist placed one tray of sunflower seedlings in the sun and another tray of sunflower seedlings in a cupboard in the laboratory. The seedlings were watered and after 6 weeks the height of each seedling was measured.

20. What is the Scientific Method?

21. State the 6 steps of the Scientific Method

22. What is a Hypothesis?

23. What measurement system do scientists use?

24. Define Mass

25. Define Volume

26. Define Density

27. What is the basic SI unit for length?

28. What is the basic SI Unit for Mass?

29. What is the basic SI Unit for Volume?

30. What is this called:

31. Name this piece of Lab Equipment

33. Convert 1000mg to g

34. Convert 160cm to mm

35. What is the abbreviation for Kilometer?

36. Draw the Metric stair step on the board

37. Convert 2500 m to km

38. Which is larger: 63cm or 6m

39. Convert 75mL to L

40. Define Accuracy

41. Define Precision

42. Is this accurate, precise or both?

43. Is this Accurate, Precise, or Both?

44. What is Scientific Notation?

45. Convert 42,300,000 into Scientific Notation

46. Convert 344,000,000 to Scientific Notation

47. Convert 0.000678 to Scientific Notation

48. Convert.000055 to Scientific Notation

49. When you work with lab chemicals and Bunsen Burners, long hair must be: A. Cut Off B. Held with both hands until lab is over C. Tied out of the way D. Cut into a Mohawk E. Don’t worry, it’ll burn off quick

50. What is wrong with this photo, name 3 things