Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 169 · 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 170 g, 120 g and 190 g. What is the mean (average) load it held, in grams?
2. 2.🧪 In a fair test, how many things do you change at a time? (a) one (b) two (c) all of them (d) none
3. 3.🧪 The first prototype held 130 g. After the team improved it, the new prototype held 170 g. How many more grams did it hold?
4. 4.🧪 A paper bridge was tested three times. It held 310 g, 230 g and 330 g. What is the mean (average) load it held, in grams?
5. 5.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
6. 6.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to test ideas cheaply (c) to sell them at once (d) to decorate a room
7. 7.True or false: to hide a failed test is good testing. (a) False (b) True
8. 8.🧪 Is it good or poor testing to guess, do not measure? (a) good testing (b) poor testing
9. 9.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 180 g. How many more grams did it hold?
10. 10.🧪 The first prototype held 100 g. After the team improved it, the new prototype held 280 g. How many more grams did it hold?
11. 11.🧪 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
12. 12.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
13. 13.🧪 What is a prototype? (a) the final product (b) a broken part (c) a sales poster (d) an early test model
14. 14.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 370 g. How many more grams did it hold?
15. 15.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) strengthen the weak part (b) sketch three ideas (c) choose and draw one (d) load it with coins
16. 16.🔍 Which is the odd one out? (a) hide a failed test (b) use the same load (c) record every result (d) change only one thing
17. 17.🧪 Is it good or poor testing to measure the same way? (a) good testing (b) poor testing
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.🔍 Which is the odd one out? (a) repeat each test (b) test it only once (c) record every result (d) use the same load
20. 20.🧪 A paper bridge was tested three times. It held 180 g, 150 g and 180 g. What is the mean (average) load it held, in grams?
21. 21.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
22. 22.True or false: to measure the same way is poor testing. (a) True (b) False
23. 23.🧪 A paper bridge was tested three times. It held 370 g, 250 g and 280 g. What is the mean (average) load it held, in grams?
24. 24.🧪 A paper bridge was tested three times. It held 240 g, 170 g and 130 g. What is the mean (average) load it held, in grams?
25. 25.🧪 Is it good or poor testing to record every result? (a) good testing (b) poor testing
26. 26.🔍 Which is the odd one out? (a) test it only once (b) hide a failed test (c) repeat each test (d) guess, do not measure
27. 27.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “strengthen the weak part”? (a) strengthen the weak part (b) sketch three ideas
28. 28.True or false: to use a new load each time is poor testing. (a) True (b) False
29. 29.🧪 Three prototype bridges were tested with the same method. Design A held 180 g, design B held 280 g and design C held 230 g. Which design was the strongest? (a) design A (b) design C (c) design B
30. 30.🧪 Is it good or poor testing to use a new load each time? (a) poor testing (b) good testing
31. 31.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
32. 32.🧪 Three prototype bridges were tested with the same method. Design A held 260 g, design B held 210 g and design C held 310 g. Which design was the weakest? (a) design C (b) design B (c) design A
33. 33.True or false: to record every result is poor testing. (a) False (b) True
34. 34.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “strengthen the weak part”? (a) strengthen the weak part (b) choose and draw one
35. 35.🧪 Is it good or poor testing to test it only once? (a) poor testing (b) good testing
36. 36.🧪 The first prototype held 190 g. After the team improved it, the new prototype held 250 g. How many more grams did it hold?
37. 37.True or false: to skip writing results is good testing. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) skip writing results (b) use the same load (c) use a new load each time (d) test it only once
39. 39.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “build it with straws”? (a) build it with straws (b) sketch three ideas
40. 40.🔍 Which is the odd one out? (a) measure the same way (b) skip writing results (c) repeat each test (d) use the same load

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