Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 371 · 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.🧪 Why do engineers make prototypes? (a) to decorate a room (b) to sell them at once (c) to avoid testing (d) to test ideas cheaply
2. 2.🔍 Which is the odd one out? (a) test it only once (b) measure the same way (c) record every result (d) use the same load
3. 3.True or false: to use a new load each time is poor testing. (a) True (b) False
4. 4.🧪 What is a prototype? (a) a broken part (b) a sales poster (c) the final product (d) an early test model
5. 5.🧪 A paper bridge was tested three times. It held 240 g, 110 g and 190 g. What is the mean (average) load it held, in grams?
6. 6.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
7. 7.🧪 In a fair test, how many things do you change at a time? (a) all of them (b) two (c) one (d) none
8. 8.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
9. 9.🧪 Three prototype bridges were tested with the same method. Design A held 340 g, design B held 290 g and design C held 240 g. Which design was the weakest? (a) design A (b) design B (c) design C
10. 10.🧪 A paper bridge was tested three times. It held 330 g, 140 g and 220 g. What is the mean (average) load it held, in grams?
11. 11.🧪 Three prototype bridges were tested with the same method. Design A held 160 g, design B held 210 g and design C held 260 g. Which design was the weakest? (a) design B (b) design A (c) design C
12. 12.🔍 Which is the odd one out? (a) use the same load (b) repeat each test (c) hide a failed test (d) change only one thing
13. 13.True or false: to use the same load is poor testing. (a) True (b) False
14. 14.True or false: to change only one thing is poor testing. (a) False (b) True
15. 15.🔢 To build and test a straw bridge, what comes right after “load it with coins”? (a) sketch three ideas (b) strengthen the weak part (c) choose and draw one (d) build it with straws
16. 16.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
17. 17.🔍 Which is the odd one out? (a) change only one thing (b) measure the same way (c) change lots at once (d) use the same load
18. 18.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
19. 19.🔍 Which is the odd one out? (a) record every result (b) hide a failed test (c) skip writing results (d) change lots at once
20. 20.🔢 To build and test a straw bridge, which is the LAST step? (a) build it with straws (b) strengthen the weak part (c) load it with coins (d) read the challenge rules
21. 21.True or false: to change only one thing is good testing. (a) True (b) False
22. 22.🧪 A paper bridge was tested three times. It held 280 g, 80 g and 180 g. What is the mean (average) load it held, in grams?
23. 23.🔍 Which is the odd one out? (a) test it only once (b) hide a failed test (c) change only one thing (d) guess, do not measure
24. 24.🧪 The first prototype held 210 g. After the team improved it, the new prototype held 410 g. How many more grams did it hold?
25. 25.True or false: to change lots at once is good testing. (a) True (b) False
26. 26.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) sketch three ideas (b) strengthen the weak part (c) load it with coins (d) choose and draw one
27. 27.True or false: to test it only once is poor testing. (a) False (b) True
28. 28.🧪 The first prototype held 220 g. After the team improved it, the new prototype held 320 g. How many more grams did it hold?
29. 29.True or false: to measure the same way is poor testing. (a) False (b) True
30. 30.True or false: to guess, do not measure is poor testing. (a) False (b) True
31. 31.🔢 To build and test a straw bridge, which is the FIRST step? (a) load it with coins (b) read the challenge rules (c) sketch three ideas (d) choose and draw one
32. 32.🧪 The first prototype held 90 g. After the team improved it, the new prototype held 220 g. How many more grams did it hold?
33. 33.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
34. 34.🧪 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
35. 35.🧪 A paper bridge was tested three times. It held 320 g, 160 g and 270 g. What is the mean (average) load it held, in grams?
36. 36.🧪 A paper bridge was tested three times. It held 410 g, 310 g and 330 g. What is the mean (average) load it held, in grams?
37. 37.🔍 Which is the odd one out? (a) use the same load (b) guess, do not measure (c) skip writing results (d) hide a failed test
38. 38.🧪 Three prototype bridges were tested with the same method. Design A held 390 g, design B held 290 g and design C held 340 g. Which design was the strongest? (a) design B (b) design A (c) design C
39. 39.🧪 A paper bridge was tested three times. It held 250 g, 110 g and 210 g. What is the mean (average) load it held, in grams?
40. 40.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 160 g. How many more grams did it hold?

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