Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 298 · 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 good testing. (a) True (b) False
2. 2.🧪 A paper bridge was tested three times. It held 340 g, 320 g and 360 g. What is the mean (average) load it held, in grams?
3. 3.🧪 Why repeat a test three times? (a) the first is wrong (b) to use more paper (c) to get reliable results (d) it looks busy
4. 4.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
5. 5.True or false: to measure the same way is poor testing. (a) True (b) False
6. 6.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “read the challenge rules”? (a) read the challenge rules (b) sketch three ideas
7. 7.🔢 To build and test a straw bridge, which is the FIRST step? (a) read the challenge rules (b) sketch three ideas (c) load it with coins (d) build it with straws
8. 8.True or false: to change lots at once is poor testing. (a) True (b) False
9. 9.🧪 A paper bridge was tested three times. It held 290 g, 110 g and 200 g. What is the mean (average) load it held, in grams?
10. 10.🧪 A paper bridge was tested three times. It held 440 g, 340 g and 240 g. What is the mean (average) load it held, in grams?
11. 11.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
12. 12.🧪 Three prototype bridges were tested with the same method. Design A held 220 g, design B held 320 g and design C held 270 g. Which design was the weakest? (a) design C (b) design B (c) design A
13. 13.🧪 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 B (b) design A (c) design C
14. 14.True or false: to test it only once is poor testing. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) guess, do not measure (b) test it only once (c) skip writing results (d) repeat each test
16. 16.🔍 Which is the odd one out? (a) change lots at once (b) guess, do not measure (c) hide a failed test (d) record every result
17. 17.🔢 To build and test a straw bridge, which is the LAST step? (a) load it with coins (b) read the challenge rules (c) sketch three ideas (d) strengthen the weak part
18. 18.🧪 What is a prototype? (a) a broken part (b) the final product (c) an early test model (d) a sales poster
19. 19.🧪 The first prototype held 110 g. After the team improved it, the new prototype held 310 g. How many more grams did it hold?
20. 20.🔍 Which is the odd one out? (a) use the same load (b) measure the same way (c) test it only once (d) repeat each test
21. 21.True or false: to use a new load each time is poor testing. (a) True (b) False
22. 22.🧪 Is it good or poor testing to measure the same way? (a) poor testing (b) good testing
23. 23.🔍 Which is the odd one out? (a) test it only once (b) use the same load (c) change lots at once (d) guess, do not measure
24. 24.🧪 A paper bridge was tested three times. It held 210 g, 110 g and 280 g. What is the mean (average) load it held, in grams?
25. 25.🧪 Three prototype bridges were tested with the same method. Design A held 210 g, design B held 110 g and design C held 160 g. Which design was the weakest? (a) design A (b) design B (c) design C
26. 26.🔍 Which is the odd one out? (a) record every result (b) repeat each test (c) change only one thing (d) hide a failed test
27. 27.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) load it with coins (b) strengthen the weak part (c) read the challenge rules (d) choose and draw one
28. 28.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
29. 29.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
30. 30.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 400 g. How many more grams did it hold?
31. 31.🔍 Which is the odd one out? (a) test it only once (b) change lots at once (c) guess, do not measure (d) measure the same way
32. 32.🧪 Three prototype bridges were tested with the same method. Design A held 220 g, design B held 270 g and design C held 320 g. Which design was the weakest? (a) design C (b) design B (c) design A
33. 33.🧪 Is it good or poor testing to guess, do not measure? (a) good testing (b) poor testing
34. 34.🧪 Three prototype bridges were tested with the same method. Design A held 310 g, design B held 260 g and design C held 360 g. Which design was the weakest? (a) design C (b) design A (c) design B
35. 35.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
36. 36.🧪 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?
37. 37.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to decorate a room (c) to test ideas cheaply (d) to avoid testing
38. 38.True or false: to record every result is poor testing. (a) False (b) True
39. 39.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “load it with coins”? (a) read the challenge rules (b) load it with coins
40. 40.🧪 In a fair test, how many things do you change at a time? (a) two (b) all of them (c) one (d) none

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