Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 245 · 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 record every result is poor testing. (a) False (b) True
2. 2.🧪 Three prototype bridges were tested with the same method. Design A held 370 g, design B held 270 g and design C held 320 g. Which design was the weakest? (a) design A (b) design C (c) design B
3. 3.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
4. 4.True or false: to skip writing results is poor testing. (a) True (b) False
5. 5.True or false: to record every result is good testing. (a) False (b) True
6. 6.🧪 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 weakest? (a) design C (b) design A (c) design B
7. 7.🧪 A paper bridge was tested three times. It held 440 g, 290 g and 290 g. What is the mean (average) load it held, in grams?
8. 8.🧪 A paper bridge was tested three times. It held 200 g, 140 g and 110 g. What is the mean (average) load it held, in grams?
9. 9.🧪 A paper bridge was tested three times. It held 240 g, 150 g and 330 g. What is the mean (average) load it held, in grams?
10. 10.True or false: to guess, do not measure is poor testing. (a) False (b) True
11. 11.🧪 The first prototype held 140 g. After the team improved it, the new prototype held 280 g. How many more grams did it hold?
12. 12.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “load it with coins”? (a) load it with coins (b) sketch three ideas
13. 13.🔍 Which is the odd one out? (a) change only one thing (b) record every result (c) repeat each test (d) test it only once
14. 14.True or false: to use the same load is poor testing. (a) True (b) False
15. 15.🧪 The first prototype held 110 g. After the team improved it, the new prototype held 120 g. How many more grams did it hold?
16. 16.🧪 A paper bridge was tested three times. It held 230 g, 190 g and 180 g. What is the mean (average) load it held, in grams?
17. 17.True or false: to change lots at once is good testing. (a) True (b) False
18. 18.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) load it with coins (b) sketch three ideas (c) build it with straws (d) read the challenge rules
19. 19.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 290 g. How many more grams did it hold?
20. 20.🔢 To build and test a straw bridge, which is the LAST step? (a) sketch three ideas (b) build it with straws (c) read the challenge rules (d) strengthen the weak part
21. 21.True or false: to use the same load is good testing. (a) True (b) False
22. 22.🧪 Why repeat a test three times? (a) to use more paper (b) it looks busy (c) the first is wrong (d) to get reliable results
23. 23.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) load it with coins (b) choose and draw one (c) read the challenge rules (d) strengthen the weak part
24. 24.🔍 Which is the odd one out? (a) measure the same way (b) use a new load each time (c) test it only once (d) hide a failed test
25. 25.🧪 Three prototype bridges were tested with the same method. Design A held 250 g, design B held 300 g and design C held 200 g. Which design was the weakest? (a) design C (b) design A (c) design B
26. 26.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
27. 27.🧪 A paper bridge was tested three times. It held 390 g, 250 g and 380 g. What is the mean (average) load it held, in grams?
28. 28.🧪 Is it good or poor testing to change lots at once? (a) good testing (b) poor testing
29. 29.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 210 g. How many more grams did it hold?
30. 30.🔢 To build and test a straw bridge, what comes right after “load it with coins”? (a) strengthen the weak part (b) read the challenge rules (c) choose and draw one (d) sketch three ideas
31. 31.🧪 Is it good or poor testing to record every result? (a) good testing (b) poor testing
32. 32.🧪 The first prototype held 230 g. After the team improved it, the new prototype held 340 g. How many more grams did it hold?
33. 33.🧪 Is it good or poor testing to repeat each test? (a) good testing (b) poor testing
34. 34.True or false: to hide a failed test is poor testing. (a) False (b) True
35. 35.True or false: to change only one thing is poor testing. (a) True (b) False
36. 36.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to decorate a room (c) to test ideas cheaply (d) to sell them at once
37. 37.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 340 g. How many more grams did it hold?
38. 38.True or false: to repeat each test is poor testing. (a) True (b) False
39. 39.🧪 A paper bridge was tested three times. It held 170 g, 140 g and 140 g. What is the mean (average) load it held, in grams?
40. 40.True or false: to test it only once is good testing. (a) False (b) True

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