Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 179 · 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.🧪 Why repeat a test three times? (a) the first is wrong (b) to use more paper (c) it looks busy (d) to get reliable results
2. 2.🧪 The first prototype held 70 g. After the team improved it, the new prototype held 90 g. How many more grams did it hold?
3. 3.🔍 Which is the odd one out? (a) skip writing results (b) guess, do not measure (c) hide a failed test (d) use the same load
4. 4.True or false: to measure the same way is poor testing. (a) False (b) True
5. 5.🧪 A paper bridge was tested three times. It held 300 g, 200 g and 250 g. What is the mean (average) load it held, in grams?
6. 6.🧪 Three prototype bridges were tested with the same method. Design A held 330 g, design B held 280 g and design C held 380 g. Which design was the weakest? (a) design C (b) design B (c) design A
7. 7.🔢 To build and test a straw bridge, which is the LAST step? (a) sketch three ideas (b) read the challenge rules (c) strengthen the weak part (d) build it with straws
8. 8.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to avoid testing (c) to test ideas cheaply (d) to decorate a room
9. 9.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
10. 10.True or false: to skip writing results is poor testing. (a) True (b) False
11. 11.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 460 g. How many more grams did it hold?
12. 12.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
13. 13.True or false: to guess, do not measure is poor testing. (a) True (b) False
14. 14.True or false: to record every result is good testing. (a) False (b) True
15. 15.🧪 A paper bridge was tested three times. It held 320 g, 250 g and 180 g. What is the mean (average) load it held, in grams?
16. 16.True or false: to hide a failed test is good testing. (a) True (b) False
17. 17.🧪 The first prototype held 200 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 170 g. After the team improved it, the new prototype held 300 g. How many more grams did it hold?
20. 20.True or false: to use a new load each time is poor testing. (a) True (b) False
21. 21.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “load it with coins”? (a) choose and draw one (b) load it with coins
22. 22.🧪 What is a prototype? (a) an early test model (b) a sales poster (c) the final product (d) a broken part
23. 23.True or false: to change only one thing is poor testing. (a) True (b) False
24. 24.True or false: to change lots at once is good testing. (a) False (b) True
25. 25.🧪 Three prototype bridges were tested with the same method. Design A held 260 g, design B held 210 g and design C held 310 g. Which design was the weakest? (a) design B (b) design C (c) design A
26. 26.🔍 Which is the odd one out? (a) use a new load each time (b) use the same load (c) repeat each test (d) change only one thing
27. 27.🧪 In a fair test, how many things do you change at a time? (a) none (b) one (c) two (d) all of them
28. 28.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “read the challenge rules”? (a) read the challenge rules (b) choose and draw one
29. 29.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “strengthen the weak part”? (a) load it with coins (b) strengthen the weak part
30. 30.🧪 Three prototype bridges were tested with the same method. Design A held 180 g, design B held 130 g and design C held 230 g. Which design was the weakest? (a) design C (b) design A (c) design B
31. 31.🧪 A paper bridge was tested three times. It held 270 g, 210 g and 180 g. What is the mean (average) load it held, in grams?
32. 32.🧪 A paper bridge was tested three times. It held 290 g, 190 g and 120 g. What is the mean (average) load it held, in grams?
33. 33.True or false: to change only one thing is good testing. (a) False (b) True
34. 34.🧪 The first prototype held 190 g. After the team improved it, the new prototype held 230 g. How many more grams did it hold?
35. 35.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “choose and draw one”? (a) choose and draw one (b) read the challenge rules
36. 36.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) build it with straws (b) strengthen the weak part (c) load it with coins (d) read the challenge rules
37. 37.True or false: to skip writing results is good testing. (a) False (b) True
38. 38.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
39. 39.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “choose and draw one”? (a) load it with coins (b) choose and draw one
40. 40.True or false: to test it only once is good testing. (a) False (b) True

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