Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 475 · 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.🧪 In a fair test, how many things do you change at a time? (a) one (b) none (c) two (d) all of them
2. 2.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to test ideas cheaply (c) to sell them at once (d) to decorate a room
3. 3.🧪 A paper bridge was tested three times. It held 350 g, 330 g and 310 g. What is the mean (average) load it held, in grams?
4. 4.🧪 A paper bridge was tested three times. It held 210 g, 150 g and 210 g. What is the mean (average) load it held, in grams?
5. 5.🧪 A paper bridge was tested three times. It held 240 g, 150 g and 300 g. What is the mean (average) load it held, in grams?
6. 6.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
7. 7.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) strengthen the weak part (b) load it with coins (c) build it with straws (d) read the challenge rules
8. 8.🧪 A paper bridge was tested three times. It held 350 g, 170 g and 290 g. What is the mean (average) load it held, in grams?
9. 9.🔢 To build and test a straw bridge, which is the FIRST step? (a) build it with straws (b) strengthen the weak part (c) choose and draw one (d) read the challenge rules
10. 10.🔢 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
11. 11.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) load it with coins (b) choose and draw one (c) read the challenge rules (d) strengthen the weak part
12. 12.🔍 Which is the odd one out? (a) use the same load (b) repeat each test (c) guess, do not measure (d) measure the same way
13. 13.🧪 The first prototype held 70 g. After the team improved it, the new prototype held 190 g. How many more grams did it hold?
14. 14.🧪 A paper bridge was tested three times. It held 340 g, 170 g and 270 g. What is the mean (average) load it held, in grams?
15. 15.🧪 A paper bridge was tested three times. It held 370 g, 190 g and 250 g. What is the mean (average) load it held, in grams?
16. 16.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) build it with straws (b) choose and draw one (c) sketch three ideas (d) load it with coins
17. 17.True or false: to change only one thing is poor testing. (a) False (b) True
18. 18.🧪 Why repeat a test three times? (a) the first is wrong (b) to use more paper (c) to get reliable results (d) it looks busy
19. 19.🧪 Is it good or poor testing to test it only once? (a) poor testing (b) good testing
20. 20.🧪 A paper bridge was tested three times. It held 350 g, 330 g and 370 g. What is the mean (average) load it held, in grams?
21. 21.🧪 The first prototype held 280 g. After the team improved it, the new prototype held 300 g. How many more grams did it hold?
22. 22.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “load it with coins”? (a) load it with coins (b) build it with straws
23. 23.True or false: to change lots at once is good testing. (a) False (b) True
24. 24.🧪 Is it good or poor testing to measure the same way? (a) poor testing (b) good testing
25. 25.🧪 A paper bridge was tested three times. It held 200 g, 70 g and 240 g. What is the mean (average) load it held, in grams?
26. 26.🧪 A paper bridge was tested three times. It held 200 g, 110 g and 290 g. What is the mean (average) load it held, in grams?
27. 27.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 140 g. How many more grams did it hold?
28. 28.🧪 Three prototype bridges were tested with the same method. Design A held 220 g, design B held 320 g and design C held 270 g. Which design was the strongest? (a) design B (b) design C (c) design A
29. 29.🔍 Which is the odd one out? (a) change only one thing (b) measure the same way (c) test it only once (d) use the same load
30. 30.True or false: to use a new load each time is poor testing. (a) True (b) False
31. 31.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 470 g. How many more grams did it hold?
32. 32.🔢 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) read the challenge rules (d) load it with coins
33. 33.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
34. 34.🧪 The first prototype held 210 g. After the team improved it, the new prototype held 220 g. How many more grams did it hold?
35. 35.🧪 Three prototype bridges were tested with the same method. Design A held 210 g, design B held 260 g and design C held 310 g. Which design was the weakest? (a) design B (b) design C (c) design A
36. 36.🧪 A paper bridge was tested three times. It held 330 g, 260 g and 220 g. What is the mean (average) load it held, in grams?
37. 37.🧪 A paper bridge was tested three times. It held 280 g, 180 g and 290 g. What is the mean (average) load it held, in grams?
38. 38.🔍 Which is the odd one out? (a) change lots at once (b) hide a failed test (c) skip writing results (d) change only one thing
39. 39.🧪 The first prototype held 130 g. After the team improved it, the new prototype held 220 g. How many more grams did it hold?
40. 40.True or false: to record every result is good testing. (a) True (b) False

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