Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 147 · 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.🔍 Which is the odd one out? (a) use the same load (b) record every result (c) repeat each test (d) test it only once
2. 2.🧪 A paper bridge was tested three times. It held 420 g, 300 g and 300 g. What is the mean (average) load it held, in grams?
3. 3.🧪 Why repeat a test three times? (a) it looks busy (b) to get reliable results (c) to use more paper (d) the first is wrong
4. 4.🔢 To build and test a straw bridge, which is the LAST step? (a) strengthen the weak part (b) read the challenge rules (c) load it with coins (d) sketch three ideas
5. 5.🔢 To build and test a straw bridge, what comes right after “load it with coins”? (a) strengthen the weak part (b) choose and draw one (c) read the challenge rules (d) sketch three ideas
6. 6.🧪 Is it good or poor testing to change lots at once? (a) good testing (b) poor testing
7. 7.🧪 What is a prototype? (a) a broken part (b) an early test model (c) a sales poster (d) the final product
8. 8.🔍 Which is the odd one out? (a) skip writing results (b) change lots at once (c) test it only once (d) change only one thing
9. 9.🧪 A paper bridge was tested three times. It held 250 g, 180 g and 290 g. What is the mean (average) load it held, in grams?
10. 10.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “choose and draw one”? (a) strengthen the weak part (b) choose and draw one
11. 11.🧪 The first prototype held 220 g. After the team improved it, the new prototype held 350 g. How many more grams did it hold?
12. 12.🧪 The first prototype held 110 g. After the team improved it, the new prototype held 150 g. How many more grams did it hold?
13. 13.🧪 A paper bridge was tested three times. It held 300 g, 300 g and 300 g. What is the mean (average) load it held, in grams?
14. 14.🔍 Which is the odd one out? (a) repeat each test (b) guess, do not measure (c) test it only once (d) change lots at once
15. 15.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “sketch three ideas”? (a) sketch three ideas (b) strengthen the weak part
16. 16.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “read the challenge rules”? (a) read the challenge rules (b) load it with coins
17. 17.🧪 In a fair test, how many things do you change at a time? (a) one (b) two (c) all of them (d) none
18. 18.True or false: to use a new load each time is poor testing. (a) False (b) True
19. 19.True or false: to guess, do not measure is good testing. (a) True (b) False
20. 20.True or false: to repeat each test is good testing. (a) False (b) True
21. 21.🧪 A paper bridge was tested three times. It held 360 g, 260 g and 370 g. What is the mean (average) load it held, in grams?
22. 22.True or false: to record every result is good testing. (a) False (b) True
23. 23.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 290 g. How many more grams did it hold?
24. 24.🧪 A paper bridge was tested three times. It held 320 g, 140 g and 260 g. What is the mean (average) load it held, in grams?
25. 25.🧪 A paper bridge was tested three times. It held 330 g, 210 g and 150 g. What is the mean (average) load it held, in grams?
26. 26.True or false: to use the same load is good testing. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) record every result (b) hide a failed test (c) measure the same way (d) change only one thing
28. 28.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to sell them at once (c) to test ideas cheaply (d) to decorate a room
29. 29.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
30. 30.🧪 Three prototype bridges were tested with the same method. Design A held 190 g, design B held 240 g and design C held 140 g. Which design was the strongest? (a) design A (b) design B (c) design C
31. 31.🧪 Three prototype bridges were tested with the same method. Design A held 330 g, design B held 230 g and design C held 280 g. Which design was the weakest? (a) design B (b) design C (c) design A
32. 32.True or false: to guess, do not measure is poor testing. (a) False (b) True
33. 33.True or false: to record every result is poor testing. (a) False (b) True
34. 34.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
35. 35.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 110 g. How many more grams did it hold?
36. 36.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 120 g. How many more grams did it hold?
37. 37.🔍 Which is the odd one out? (a) use a new load each time (b) use the same load (c) change lots at once (d) skip writing results
38. 38.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “strengthen the weak part”? (a) build it with straws (b) strengthen the weak part
39. 39.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 110 g. How many more grams did it hold?
40. 40.True or false: to measure the same way is good testing. (a) True (b) False

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