Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 232 · 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: “build it with straws” or “sketch three ideas”? (a) build it with straws (b) sketch three ideas
2. 2.🧪 The first prototype held 290 g. After the team improved it, the new prototype held 390 g. How many more grams did it hold?
3. 3.🧪 What is a prototype? (a) an early test model (b) the final product (c) a broken part (d) a sales poster
4. 4.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 410 g. How many more grams did it hold?
5. 5.🧪 The first prototype held 70 g. After the team improved it, the new prototype held 240 g. How many more grams did it hold?
6. 6.True or false: to use the same load is poor testing. (a) True (b) False
7. 7.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 210 g. How many more grams did it hold?
8. 8.🧪 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
9. 9.🧪 Three prototype bridges were tested with the same method. Design A held 200 g, design B held 100 g and design C held 150 g. Which design was the strongest? (a) design A (b) design C (c) design B
10. 10.🧪 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
11. 11.🧪 A paper bridge was tested three times. It held 260 g, 190 g and 300 g. What is the mean (average) load it held, in grams?
12. 12.True or false: to change lots at once is poor testing. (a) True (b) False
13. 13.🧪 Is it good or poor testing to measure the same way? (a) poor testing (b) good testing
14. 14.🧪 Is it good or poor testing to use a new load each time? (a) poor testing (b) good testing
15. 15.🧪 A paper bridge was tested three times. It held 200 g, 110 g and 140 g. What is the mean (average) load it held, in grams?
16. 16.True or false: to measure the same way is good testing. (a) False (b) True
17. 17.🧪 Is it good or poor testing to repeat each test? (a) good testing (b) poor testing
18. 18.True or false: to skip writing results is good testing. (a) True (b) False
19. 19.🧪 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 weakest? (a) design B (b) design C (c) design A
20. 20.🔢 To build and test a straw bridge, which is the FIRST step? (a) build it with straws (b) strengthen the weak part (c) read the challenge rules (d) sketch three ideas
21. 21.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
22. 22.🧪 Is it good or poor testing to hide a failed test? (a) poor testing (b) good testing
23. 23.🧪 Is it good or poor testing to change lots at once? (a) good testing (b) poor testing
24. 24.🧪 Three prototype bridges were tested with the same method. Design A held 140 g, design B held 190 g and design C held 240 g. Which design was the strongest? (a) design A (b) design B (c) design C
25. 25.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
26. 26.🔢 To build and test a straw bridge, what comes right after “load it with coins”? (a) sketch three ideas (b) build it with straws (c) strengthen the weak part (d) read the challenge rules
27. 27.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
28. 28.True or false: to record every result is good testing. (a) False (b) True
29. 29.True or false: to change lots at once is good testing. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) use a new load each time (b) repeat each test (c) use the same load (d) change only one thing
31. 31.🧪 The first prototype held 220 g. After the team improved it, the new prototype held 280 g. How many more grams did it hold?
32. 32.🧪 The first prototype held 290 g. After the team improved it, the new prototype held 460 g. How many more grams did it hold?
33. 33.🔍 Which is the odd one out? (a) measure the same way (b) skip writing results (c) repeat each test (d) record every result
34. 34.True or false: to measure the same way is poor testing. (a) True (b) False
35. 35.True or false: to repeat each test is poor testing. (a) False (b) True
36. 36.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) sketch three ideas (b) load it with coins (c) strengthen the weak part (d) choose and draw one
37. 37.🧪 The first prototype held 280 g. After the team improved it, the new prototype held 300 g. How many more grams did it hold?
38. 38.🧪 In a fair test, how many things do you change at a time? (a) one (b) all of them (c) none (d) two
39. 39.🧪 A paper bridge was tested three times. It held 280 g, 250 g and 250 g. What is the mean (average) load it held, in grams?
40. 40.True or false: to change only one thing is poor testing. (a) False (b) True

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