Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 38 · 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.🧪 Is it good or poor testing to measure the same way? (a) good testing (b) poor testing
2. 2.True or false: to change only one thing is poor testing. (a) False (b) True
3. 3.🧪 The first prototype held 130 g. After the team improved it, the new prototype held 330 g. How many more grams did it hold?
4. 4.🔢 To build and test a straw bridge, which is the FIRST step? (a) strengthen the weak part (b) sketch three ideas (c) build it with straws (d) read the challenge rules
5. 5.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) read the challenge rules (b) strengthen the weak part (c) choose and draw one (d) load it with coins
6. 6.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) strengthen the weak part (b) read the challenge rules (c) build it with straws (d) load it with coins
7. 7.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to test ideas cheaply (c) to decorate a room (d) to avoid testing
8. 8.True or false: to skip writing results is poor testing. (a) True (b) False
9. 9.🧪 Why repeat a test three times? (a) it looks busy (b) the first is wrong (c) to use more paper (d) to get reliable results
10. 10.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
11. 11.🧪 A paper bridge was tested three times. It held 220 g, 170 g and 180 g. What is the mean (average) load it held, in grams?
12. 12.🧪 The first prototype held 290 g. After the team improved it, the new prototype held 400 g. How many more grams did it hold?
13. 13.🧪 A paper bridge was tested three times. It held 350 g, 220 g and 180 g. What is the mean (average) load it held, in grams?
14. 14.🔍 Which is the odd one out? (a) measure the same way (b) change only one thing (c) record every result (d) change lots at once
15. 15.True or false: to guess, do not measure is good testing. (a) False (b) True
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 guess, do not measure? (a) poor testing (b) good testing
18. 18.🧪 In a fair test, how many things do you change at a time? (a) two (b) none (c) all of them (d) one
19. 19.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
20. 20.🔍 Which is the odd one out? (a) change only one thing (b) use a new load each time (c) guess, do not measure (d) test it only once
21. 21.🧪 What is a prototype? (a) a broken part (b) a sales poster (c) an early test model (d) the final product
22. 22.🔍 Which is the odd one out? (a) test it only once (b) guess, do not measure (c) repeat each test (d) use a new load each time
23. 23.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
24. 24.True or false: to hide a failed test is poor testing. (a) False (b) True
25. 25.True or false: to hide a failed test is good testing. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) test it only once (b) use the same load (c) skip writing results (d) hide a failed test
27. 27.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
28. 28.🧪 Three prototype bridges were tested with the same method. Design A held 200 g, design B held 100 g and design C held 150 g. Which design was the weakest? (a) design A (b) design C (c) design B
29. 29.True or false: to test it only once is good testing. (a) False (b) True
30. 30.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) build it with straws (b) strengthen the weak part (c) sketch three ideas (d) load it with coins
31. 31.🔍 Which is the odd one out? (a) measure the same way (b) record every result (c) skip writing results (d) change only one thing
32. 32.🧪 The first prototype held 190 g. After the team improved it, the new prototype held 310 g. How many more grams did it hold?
33. 33.🧪 The first prototype held 100 g. After the team improved it, the new prototype held 270 g. How many more grams did it hold?
34. 34.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “read the challenge rules”? (a) strengthen the weak part (b) read the challenge rules
35. 35.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 80 g. How many more grams did it hold?
36. 36.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
37. 37.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “load it with coins”? (a) sketch three ideas (b) load it with coins
38. 38.🧪 A paper bridge was tested three times. It held 290 g, 230 g and 230 g. What is the mean (average) load it held, in grams?
39. 39.🧪 Three prototype bridges were tested with the same method. Design A held 250 g, design B held 350 g and design C held 300 g. Which design was the strongest? (a) design C (b) design B (c) design A
40. 40.🧪 The first prototype held 110 g. After the team improved it, the new prototype held 310 g. How many more grams did it hold?

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