Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 342 · 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.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) strengthen the weak part (b) load it with coins (c) choose and draw one (d) sketch three ideas
2. 2.🧪 A paper bridge was tested three times. It held 300 g, 230 g and 370 g. What is the mean (average) load it held, in grams?
3. 3.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
4. 4.True or false: to change only one thing is good testing. (a) False (b) True
5. 5.🧪 A paper bridge was tested three times. It held 280 g, 120 g and 200 g. What is the mean (average) load it held, in grams?
6. 6.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 330 g. How many more grams did it hold?
7. 7.True or false: to hide a failed test is good testing. (a) False (b) True
8. 8.🧪 A paper bridge was tested three times. It held 280 g, 200 g and 120 g. What is the mean (average) load it held, in grams?
9. 9.🔍 Which is the odd one out? (a) test it only once (b) measure the same way (c) change only one thing (d) record every result
10. 10.True or false: to guess, do not measure is good testing. (a) False (b) True
11. 11.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 160 g. How many more grams did it hold?
12. 12.🔢 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
13. 13.🔢 To build and test a straw bridge, which is the LAST step? (a) strengthen the weak part (b) build it with straws (c) load it with coins (d) read the challenge rules
14. 14.🧪 A paper bridge was tested three times. It held 210 g, 110 g and 160 g. What is the mean (average) load it held, in grams?
15. 15.🧪 In a fair test, how many things do you change at a time? (a) two (b) all of them (c) none (d) one
16. 16.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 290 g. How many more grams did it hold?
17. 17.🧪 The first prototype held 190 g. After the team improved it, the new prototype held 300 g. How many more grams did it hold?
18. 18.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
19. 19.🧪 The first prototype held 180 g. After the team improved it, the new prototype held 190 g. How many more grams did it hold?
20. 20.🧪 Is it good or poor testing to guess, do not measure? (a) good testing (b) poor testing
21. 21.🔍 Which is the odd one out? (a) change lots at once (b) guess, do not measure (c) test it only once (d) record every result
22. 22.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “choose and draw one”? (a) choose and draw one (b) strengthen the weak part
23. 23.🔢 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
24. 24.🧪 What is a prototype? (a) a broken part (b) an early test model (c) the final product (d) a sales poster
25. 25.🔍 Which is the odd one out? (a) guess, do not measure (b) test it only once (c) repeat each test (d) skip writing results
26. 26.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “choose and draw one”? (a) sketch three ideas (b) choose and draw one
27. 27.🧪 Why repeat a test three times? (a) to get reliable results (b) the first is wrong (c) to use more paper (d) it looks busy
28. 28.🧪 The first prototype held 120 g. After the team improved it, the new prototype held 130 g. How many more grams did it hold?
29. 29.True or false: to use a new load each time is poor testing. (a) False (b) True
30. 30.🔢 To build and test a straw bridge, which is the FIRST step? (a) choose and draw one (b) strengthen the weak part (c) read the challenge rules (d) build it with straws
31. 31.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
32. 32.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 250 g. How many more grams did it hold?
33. 33.🔍 Which is the odd one out? (a) use the same load (b) repeat each test (c) measure the same way (d) change lots at once
34. 34.🧪 A paper bridge was tested three times. It held 270 g, 110 g and 160 g. What is the mean (average) load it held, in grams?
35. 35.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
36. 36.True or false: to skip writing results is good testing. (a) True (b) False
37. 37.🧪 Why do engineers make prototypes? (a) to decorate a room (b) to test ideas cheaply (c) to sell them at once (d) to avoid testing
38. 38.True or false: to record every result is poor testing. (a) False (b) True
39. 39.🧪 Three prototype bridges were tested with the same method. Design A held 150 g, design B held 200 g and design C held 100 g. Which design was the weakest? (a) design C (b) design A (c) design B
40. 40.🧪 A paper bridge was tested three times. It held 360 g, 280 g and 290 g. What is the mean (average) load it held, in grams?

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