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Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 819 · 40 questions
TalentJR

Engineer's tip (Test fairly, record honestly): Prototype = an early model made to test an idea. Fair test: change one thing, keep the rest the same, measure and record every result. Mean of three tests = (first + second + third) ÷ 3.

NameDateTime takenScore ___ / 40
  1. 1.True or false: to change only one thing is good testing. (a) True (b) False
  2. 2.True or false: to record every result is good testing. (a) False (b) True
  3. 3.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
  4. 4.True or false: to record every result is poor testing. (a) False (b) True
  5. 5.True or false: to repeat each test is poor testing. (a) False (b) True
  6. 6.True or false: to use a new load each time is poor testing. (a) False (b) True
  7. 7.🧪 Why repeat a test three times? (a) the first is wrong (b) to get reliable results (c) it looks busy (d) to use more paper
  8. 8.🔍 Which is the odd one out? (a) test it only once (b) change lots at once (c) guess, do not measure (d) use the same load
  9. 9.🧪 Three prototype bridges were tested with the same method. Design A held 150 g, design B held 200 g and design C held 100 g. Which design was the strongest? (a) design A (b) design C (c) design B
  10. 10.🔍 Which is the odd one out? (a) test it only once (b) measure the same way (c) use the same load (d) record every result
  11. 11.🧪 What is a prototype? (a) a broken part (b) the final product (c) an early test model (d) a sales poster
  12. 12.🔢 To build and test a straw bridge, which is the LAST step? (a) strengthen the weak part (b) load it with coins (c) choose and draw one (d) read the challenge rules
  13. 13.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
  14. 14.True or false: to change only one thing is poor testing. (a) True (b) False
  15. 15.True or false: to repeat each test is good testing. (a) True (b) False
  16. 16.🧪 Three prototype bridges were tested with the same method. Design A held 230 g, design B held 330 g and design C held 280 g. Which design was the strongest? (a) design A (b) design C (c) design B
  17. 17.🧪 A paper bridge was tested three times. It held 330 g, 220 g and 290 g. What is the mean (average) load it held, in grams?
  18. 18.🧪 A paper bridge was tested three times. It held 230 g, 160 g and 150 g. What is the mean (average) load it held, in grams?
  19. 19.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to decorate a room (c) to avoid testing (d) to test ideas cheaply
  20. 20.🔍 Which is the odd one out? (a) repeat each test (b) change only one thing (c) use a new load each time (d) use the same load
  21. 21.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
  22. 22.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
  23. 23.True or false: to hide a failed test is poor testing. (a) False (b) True
  24. 24.True or false: to test it only once is good testing. (a) False (b) True
  25. 25.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 180 g. How many more grams did it hold?
  26. 26.🧪 Three prototype bridges were tested with the same method. Design A held 290 g, design B held 390 g and design C held 340 g. Which design was the strongest? (a) design C (b) design A (c) design B
  27. 27.🧪 Three prototype bridges were tested with the same method. Design A held 160 g, design B held 210 g and design C held 260 g. Which design was the strongest? (a) design C (b) design A (c) design B
  28. 28.🔢 To build and test a straw bridge, which is the FIRST step? (a) strengthen the weak part (b) read the challenge rules (c) build it with straws (d) choose and draw one
  29. 29.True or false: to use a new load each time is good testing. (a) True (b) False
  30. 30.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
  31. 31.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
  32. 32.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 400 g and design C held 350 g. Which design was the weakest? (a) design C (b) design B (c) design A
  33. 33.True or false: to skip writing results is poor testing. (a) False (b) True
  34. 34.True or false: to guess, do not measure is poor testing. (a) False (b) True
  35. 35.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “read the challenge rules”? (a) read the challenge rules (b) build it with straws
  36. 36.🧪 A paper bridge was tested three times. It held 200 g, 100 g and 240 g. What is the mean (average) load it held, in grams?
  37. 37.True or false: to use the same load is poor testing. (a) True (b) False
  38. 38.🧪 In a fair test, how many things do you change at a time? (a) all of them (b) two (c) one (d) none
  39. 39.🔍 Which is the odd one out? (a) hide a failed test (b) change lots at once (c) measure the same way (d) guess, do not measure
  40. 40.🧪 A paper bridge was tested three times. It held 240 g, 120 g and 120 g. What is the mean (average) load it held, in grams?

Answer key

  1. True
  2. True
  3. poor testing
  4. False
  5. False
  6. True
  7. to get reliable results
  8. use the same load
  9. design B
  10. test it only once
  11. an early test model
  12. strengthen the weak part
  13. poor testing
  14. False
  15. True
  16. design B
  17. 280
  18. 180
  19. to test ideas cheaply
  20. use a new load each time
  21. poor testing
  22. poor testing
  23. True
  24. False
  25. 100
  26. design B
  27. design C
  28. read the challenge rules
  29. False
  30. good testing
  31. good testing
  32. design A
  33. True
  34. True
  35. read the challenge rules
  36. 180
  37. False
  38. one
  39. measure the same way
  40. 160

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