Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 723 · 40 questions

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.

1. 1.True or false: to change lots at once is good testing. (a) True (b) False
2. 2.🧪 In a fair test, how many things do you change at a time? (a) two (b) all of them (c) one (d) none
3. 3.🧪 A paper bridge was tested three times. It held 200 g, 90 g and 280 g. What is the mean (average) load it held, in grams?
4. 4.🧪 The first prototype held 210 g. After the team improved it, the new prototype held 410 g. How many more grams did it hold?
5. 5.🧪 A paper bridge was tested three times. It held 270 g, 220 g and 170 g. What is the mean (average) load it held, in grams?
6. 6.🧪 A paper bridge was tested three times. It held 270 g, 210 g and 210 g. What is the mean (average) load it held, in grams?
7. 7.🧪 Three prototype bridges were tested with the same method. Design A held 280 g, design B held 380 g and design C held 330 g. Which design was the weakest? (a) design B (b) design A (c) design C
8. 8.🔢 To build and test a straw bridge, which is the LAST step? (a) load it with coins (b) sketch three ideas (c) build it with straws (d) strengthen the weak part
9. 9.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
10. 10.True or false: to use a new load each time is poor testing. (a) False (b) True
11. 11.🧪 A paper bridge was tested three times. It held 160 g, 70 g and 250 g. What is the mean (average) load it held, in grams?
12. 12.True or false: to repeat each test is poor testing. (a) True (b) False
13. 13.🧪 Why repeat a test three times? (a) to get reliable results (b) to use more paper (c) the first is wrong (d) it looks busy
14. 14.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 250 g and design C held 200 g. Which design was the weakest? (a) design B (b) design A (c) design C
15. 15.True or false: to guess, do not measure is good testing. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) hide a failed test (b) skip writing results (c) guess, do not measure (d) record every result
17. 17.🔍 Which is the odd one out? (a) use the same load (b) test it only once (c) measure the same way (d) record every result
18. 18.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
19. 19.🧪 A paper bridge was tested three times. It held 280 g, 140 g and 180 g. What is the mean (average) load it held, in grams?
20. 20.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
21. 21.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to test ideas cheaply (c) to avoid testing (d) to decorate a room
22. 22.🧪 A paper bridge was tested three times. It held 210 g, 120 g and 180 g. What is the mean (average) load it held, in grams?
23. 23.True or false: to use a new load each time is good testing. (a) False (b) True
24. 24.🧪 What is a prototype? (a) a broken part (b) a sales poster (c) the final product (d) an early test model
25. 25.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 450 g. How many more grams did it hold?
26. 26.🧪 Is it good or poor testing to measure the same way? (a) poor testing (b) good testing
27. 27.🧪 A paper bridge was tested three times. It held 290 g, 280 g and 270 g. What is the mean (average) load it held, in grams?
28. 28.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
29. 29.🔍 Which is the odd one out? (a) skip writing results (b) change only one thing (c) test it only once (d) hide a failed test
30. 30.True or false: to measure the same way is good testing. (a) False (b) True
31. 31.🧪 The first prototype held 210 g. After the team improved it, the new prototype held 330 g. How many more grams did it hold?
32. 32.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) load it with coins (b) build it with straws (c) strengthen the weak part (d) read the challenge rules
33. 33.🧪 The first prototype held 280 g. After the team improved it, the new prototype held 380 g. How many more grams did it hold?
34. 34.🔍 Which is the odd one out? (a) repeat each test (b) record every result (c) change lots at once (d) change only one thing
35. 35.🧪 The first prototype held 190 g. After the team improved it, the new prototype held 360 g. How many more grams did it hold?
36. 36.True or false: to guess, do not measure is poor testing. (a) False (b) True
37. 37.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 300 g. How many more grams did it hold?
38. 38.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) load it with coins (b) strengthen the weak part (c) choose and draw one (d) build it with straws
39. 39.True or false: to change only one thing is good testing. (a) False (b) True
40. 40.True or false: to skip writing results is poor testing. (a) True (b) False

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