Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 105 · 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, which comes first: “sketch three ideas” or “load it with coins”? (a) sketch three ideas (b) load it with coins
2. 2.🧪 A paper bridge was tested three times. It held 260 g, 170 g and 290 g. What is the mean (average) load it held, in grams?
3. 3.🧪 A paper bridge was tested three times. It held 200 g, 50 g and 200 g. What is the mean (average) load it held, in grams?
4. 4.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 310 g. How many more grams did it hold?
5. 5.🧪 A paper bridge was tested three times. It held 310 g, 130 g and 220 g. What is the mean (average) load it held, in grams?
6. 6.🧪 What is a prototype? (a) the final product (b) a broken part (c) an early test model (d) a sales poster
7. 7.🧪 A paper bridge was tested three times. It held 180 g, 90 g and 270 g. What is the mean (average) load it held, in grams?
8. 8.True or false: to change only one thing is poor testing. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) use the same load (b) hide a failed test (c) measure the same way (d) change only one thing
10. 10.True or false: to skip writing results is good testing. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) measure the same way (b) record every result (c) repeat each test (d) skip writing results
12. 12.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 380 g. How many more grams did it hold?
13. 13.🧪 A paper bridge was tested three times. It held 250 g, 140 g and 90 g. What is the mean (average) load it held, in grams?
14. 14.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
15. 15.🔢 To build and test a straw bridge, which is the LAST step? (a) strengthen the weak part (b) read the challenge rules (c) build it with straws (d) load it with coins
16. 16.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
17. 17.🧪 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
18. 18.🧪 A paper bridge was tested three times. It held 400 g, 280 g and 310 g. What is the mean (average) load it held, in grams?
19. 19.True or false: to guess, do not measure is good testing. (a) False (b) True
20. 20.🧪 Three prototype bridges were tested with the same method. Design A held 210 g, design B held 310 g and design C held 260 g. Which design was the weakest? (a) design C (b) design A (c) design B
21. 21.🧪 A paper bridge was tested three times. It held 240 g, 90 g and 150 g. What is the mean (average) load it held, in grams?
22. 22.🔍 Which is the odd one out? (a) use the same load (b) change lots at once (c) test it only once (d) guess, do not measure
23. 23.🧪 A paper bridge was tested three times. It held 240 g, 180 g and 210 g. What is the mean (average) load it held, in grams?
24. 24.🔍 Which is the odd one out? (a) change only one thing (b) guess, do not measure (c) record every result (d) use the same load
25. 25.True or false: to use the same load is good testing. (a) False (b) True
26. 26.True or false: to repeat each test is poor testing. (a) False (b) True
27. 27.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
28. 28.🔢 To build and test a straw bridge, which is the FIRST step? (a) strengthen the weak part (b) choose and draw one (c) read the challenge rules (d) load it with coins
29. 29.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) strengthen the weak part (b) sketch three ideas (c) choose and draw one (d) load it with coins
30. 30.🧪 A paper bridge was tested three times. It held 360 g, 340 g and 350 g. What is the mean (average) load it held, in grams?
31. 31.True or false: to record every result is poor testing. (a) False (b) True
32. 32.🧪 The first prototype held 90 g. After the team improved it, the new prototype held 250 g. How many more grams did it hold?
33. 33.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “read the challenge rules”? (a) sketch three ideas (b) read the challenge rules
34. 34.🧪 A paper bridge was tested three times. It held 240 g, 80 g and 130 g. What is the mean (average) load it held, in grams?
35. 35.🧪 Three prototype bridges were tested with the same method. Design A held 230 g, design B held 130 g and design C held 180 g. Which design was the strongest? (a) design A (b) design C (c) design B
36. 36.🧪 A paper bridge was tested three times. It held 340 g, 190 g and 190 g. What is the mean (average) load it held, in grams?
37. 37.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to test ideas cheaply (c) to decorate a room (d) to sell them at once
38. 38.🧪 The first prototype held 160 g. After the team improved it, the new prototype held 200 g. How many more grams did it hold?
39. 39.🧪 A paper bridge was tested three times. It held 260 g, 200 g and 170 g. What is the mean (average) load it held, in grams?
40. 40.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing

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