Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 412 · 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.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) sketch three ideas (b) strengthen the weak part (c) choose and draw one (d) load it with coins
2. 2.🧪 What is a prototype? (a) the final product (b) an early test model (c) a broken part (d) a sales poster
3. 3.🧪 A paper bridge was tested three times. It held 290 g, 140 g and 140 g. What is the mean (average) load it held, in grams?
4. 4.True or false: to use a new load each time is poor testing. (a) True (b) False
5. 5.🔢 To build and test a straw bridge, which is the LAST step? (a) build it with straws (b) sketch three ideas (c) strengthen the weak part (d) load it with coins
6. 6.True or false: to guess, do not measure is poor testing. (a) True (b) False
7. 7.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 120 g. How many more grams did it hold?
8. 8.🧪 In a fair test, how many things do you change at a time? (a) one (b) two (c) all of them (d) none
9. 9.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
10. 10.True or false: to measure the same way is good testing. (a) True (b) False
11. 11.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
12. 12.🔍 Which is the odd one out? (a) use the same load (b) change only one thing (c) test it only once (d) repeat each test
13. 13.🧪 Why repeat a test three times? (a) to use more paper (b) to get reliable results (c) the first is wrong (d) it looks busy
14. 14.🧪 Is it good or poor testing to change only one thing? (a) good testing (b) poor testing
15. 15.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
16. 16.🔍 Which is the odd one out? (a) test it only once (b) guess, do not measure (c) repeat each test (d) skip writing results
17. 17.True or false: to hide a failed test is good testing. (a) False (b) True
18. 18.🧪 A paper bridge was tested three times. It held 260 g, 190 g and 270 g. What is the mean (average) load it held, in grams?
19. 19.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) read the challenge rules (b) build it with straws (c) sketch three ideas (d) load it with coins
20. 20.True or false: to use the same load is poor testing. (a) True (b) False
21. 21.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “load it with coins”? (a) build it with straws (b) load it with coins
22. 22.🔍 Which is the odd one out? (a) measure the same way (b) repeat each test (c) use a new load each time (d) use the same load
23. 23.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
24. 24.True or false: to change lots at once is good testing. (a) False (b) True
25. 25.🧪 Is it good or poor testing to record every result? (a) good testing (b) poor testing
26. 26.🧪 A paper bridge was tested three times. It held 360 g, 280 g and 230 g. What is the mean (average) load it held, in grams?
27. 27.🧪 A paper bridge was tested three times. It held 210 g, 170 g and 250 g. What is the mean (average) load it held, in grams?
28. 28.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “sketch three ideas”? (a) sketch three ideas (b) load it with coins
29. 29.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 340 g. How many more grams did it hold?
30. 30.🧪 The first prototype held 180 g. After the team improved it, the new prototype held 190 g. How many more grams did it hold?
31. 31.True or false: to test it only once is good testing. (a) False (b) True
32. 32.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) strengthen the weak part (b) build it with straws (c) sketch three ideas (d) choose and draw one
33. 33.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 460 g. How many more grams did it hold?
34. 34.🔍 Which is the odd one out? (a) change only one thing (b) guess, do not measure (c) test it only once (d) change lots at once
35. 35.🔍 Which is the odd one out? (a) change only one thing (b) measure the same way (c) skip writing results (d) repeat each test
36. 36.🔍 Which is the odd one out? (a) change lots at once (b) skip writing results (c) guess, do not measure (d) use the same load
37. 37.True or false: to skip writing results is good testing. (a) True (b) False
38. 38.🧪 Is it good or poor testing to test it only once? (a) poor testing (b) good testing
39. 39.🧪 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
40. 40.🧪 Three prototype bridges were tested with the same method. Design A held 290 g, design B held 340 g and design C held 240 g. Which design was the weakest? (a) design C (b) design A (c) design B

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