Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 621 · 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.True or false: to change lots at once is poor testing. (a) True (b) False
2. 2.🧪 What is a prototype? (a) a broken part (b) the final product (c) a sales poster (d) an early test model
3. 3.🧪 Why do engineers make prototypes? (a) to test ideas cheaply (b) to avoid testing (c) to sell them at once (d) to decorate a room
4. 4.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “choose and draw one”? (a) build it with straws (b) choose and draw one
5. 5.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
6. 6.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
7. 7.🔍 Which is the odd one out? (a) hide a failed test (b) repeat each test (c) change lots at once (d) guess, do not measure
8. 8.True or false: to measure the same way is poor testing. (a) False (b) True
9. 9.🧪 A paper bridge was tested three times. It held 230 g, 130 g and 240 g. What is the mean (average) load it held, in grams?
10. 10.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “read the challenge rules”? (a) read the challenge rules (b) sketch three ideas
11. 11.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) strengthen the weak part (b) load it with coins (c) build it with straws (d) sketch three ideas
12. 12.🧪 The first prototype held 280 g. After the team improved it, the new prototype held 310 g. How many more grams did it hold?
13. 13.True or false: to repeat each test is good testing. (a) False (b) True
14. 14.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
15. 15.🔍 Which is the odd one out? (a) record every result (b) repeat each test (c) guess, do not measure (d) change only one thing
16. 16.True or false: to guess, do not measure is poor testing. (a) False (b) True
17. 17.🔢 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
18. 18.🧪 In a fair test, how many things do you change at a time? (a) one (b) two (c) none (d) all of them
19. 19.🧪 A paper bridge was tested three times. It held 260 g, 110 g and 140 g. What is the mean (average) load it held, in grams?
20. 20.🧪 A paper bridge was tested three times. It held 410 g, 330 g and 280 g. What is the mean (average) load it held, in grams?
21. 21.🧪 Three prototype bridges were tested with the same method. Design A held 220 g, design B held 170 g and design C held 270 g. Which design was the weakest? (a) design C (b) design B (c) design A
22. 22.🧪 A paper bridge was tested three times. It held 360 g, 270 g and 180 g. What is the mean (average) load it held, in grams?
23. 23.True or false: to measure the same way is good testing. (a) True (b) False
24. 24.True or false: to change only one thing is poor testing. (a) True (b) False
25. 25.🧪 Why repeat a test three times? (a) the first is wrong (b) to get reliable results (c) to use more paper (d) it looks busy
26. 26.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “sketch three ideas”? (a) build it with straws (b) sketch three ideas
27. 27.True or false: to skip writing results is poor testing. (a) False (b) True
28. 28.🧪 A paper bridge was tested three times. It held 250 g, 140 g and 330 g. What is the mean (average) load it held, in grams?
29. 29.True or false: to skip writing results is good testing. (a) False (b) True
30. 30.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
31. 31.🔢 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
32. 32.🧪 Is it good or poor testing to change only one thing? (a) good testing (b) poor testing
33. 33.🧪 Three prototype bridges were tested with the same method. Design A held 370 g, design B held 270 g and design C held 320 g. Which design was the weakest? (a) design B (b) design C (c) design A
34. 34.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) read the challenge rules (b) build it with straws (c) choose and draw one (d) load it with coins
35. 35.🧪 A paper bridge was tested three times. It held 420 g, 310 g and 230 g. What is the mean (average) load it held, in grams?
36. 36.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
37. 37.🔍 Which is the odd one out? (a) measure the same way (b) use the same load (c) change only one thing (d) use a new load each time
38. 38.🔍 Which is the odd one out? (a) repeat each test (b) record every result (c) skip writing results (d) change only one thing
39. 39.🧪 Three prototype bridges were tested with the same method. Design A held 330 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
40. 40.True or false: to use the same load is good testing. (a) False (b) True

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