Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 117 · 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.🧪 A paper bridge was tested three times. It held 290 g, 280 g and 300 g. What is the mean (average) load it held, in grams?
2. 2.🧪 The first prototype held 110 g. After the team improved it, the new prototype held 290 g. How many more grams did it hold?
3. 3.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
4. 4.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
5. 5.True or false: to record every result is good testing. (a) True (b) False
6. 6.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) choose and draw one (b) strengthen the weak part (c) read the challenge rules (d) load it with coins
7. 7.🧪 Three prototype bridges were tested with the same method. Design A held 240 g, design B held 290 g and design C held 190 g. Which design was the strongest? (a) design C (b) design B (c) design A
8. 8.🔍 Which is the odd one out? (a) hide a failed test (b) test it only once (c) change lots at once (d) repeat each test
9. 9.🧪 What is a prototype? (a) a sales poster (b) an early test model (c) the final product (d) a broken part
10. 10.🧪 A paper bridge was tested three times. It held 290 g, 180 g and 130 g. What is the mean (average) load it held, in grams?
11. 11.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “strengthen the weak part”? (a) strengthen the weak part (b) load it with coins
12. 12.True or false: to change only one thing is poor testing. (a) False (b) True
13. 13.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “load it with coins”? (a) load it with coins (b) build it with straws
14. 14.🧪 A paper bridge was tested three times. It held 180 g, 140 g and 220 g. What is the mean (average) load it held, in grams?
15. 15.🧪 In a fair test, how many things do you change at a time? (a) all of them (b) none (c) two (d) one
16. 16.True or false: to change only one thing is good testing. (a) True (b) False
17. 17.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
18. 18.🧪 A paper bridge was tested three times. It held 250 g, 120 g and 260 g. What is the mean (average) load it held, in grams?
19. 19.True or false: to change lots at once is poor testing. (a) False (b) True
20. 20.True or false: to use the same load is poor testing. (a) False (b) True
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 measure the same way? (a) poor testing (b) good testing
23. 23.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
24. 24.🔍 Which is the odd one out? (a) test it only once (b) guess, do not measure (c) record every result (d) skip writing results
25. 25.🧪 Is it good or poor testing to repeat each test? (a) good testing (b) poor testing
26. 26.🧪 Three prototype bridges were tested with the same method. Design A held 350 g, design B held 250 g and design C held 300 g. Which design was the strongest? (a) design C (b) design A (c) design B
27. 27.🧪 A paper bridge was tested three times. It held 230 g, 150 g and 220 g. What is the mean (average) load it held, in grams?
28. 28.🧪 A paper bridge was tested three times. It held 360 g, 230 g and 190 g. What is the mean (average) load it held, in grams?
29. 29.🧪 The first prototype held 240 g. After the team improved it, the new prototype held 350 g. How many more grams did it hold?
30. 30.True or false: to record every result is poor testing. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) change only one thing (b) change lots at once (c) hide a failed test (d) skip writing results
32. 32.🧪 Is it good or poor testing to test it only once? (a) poor testing (b) good testing
33. 33.True or false: to guess, do not measure is good testing. (a) False (b) True
34. 34.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to sell them at once (c) to decorate a room (d) to test ideas cheaply
35. 35.True or false: to measure the same way is good testing. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) skip writing results (b) hide a failed test (c) use the same load (d) test it only once
37. 37.🧪 A paper bridge was tested three times. It held 230 g, 130 g and 180 g. What is the mean (average) load it held, in grams?
38. 38.🧪 The first prototype held 120 g. After the team improved it, the new prototype held 150 g. How many more grams did it hold?
39. 39.🧪 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
40. 40.True or false: to use the same load is good testing. (a) False (b) True

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