Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 251 · 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.🧪 Is it good or poor testing to change lots at once? (a) good testing (b) poor testing
2. 2.🧪 A paper bridge was tested three times. It held 150 g, 70 g and 230 g. What is the mean (average) load it held, in grams?
3. 3.🧪 A paper bridge was tested three times. It held 280 g, 90 g and 200 g. What is the mean (average) load it held, in grams?
4. 4.🧪 A paper bridge was tested three times. It held 240 g, 170 g and 130 g. What is the mean (average) load it held, in grams?
5. 5.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
6. 6.🔢 To build and test a straw bridge, which is the FIRST step? (a) read the challenge rules (b) choose and draw one (c) strengthen the weak part (d) sketch three ideas
7. 7.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) build it with straws (b) load it with coins (c) choose and draw one (d) sketch three ideas
8. 8.True or false: to change only one thing is good testing. (a) True (b) False
9. 9.True or false: to repeat each test is good testing. (a) True (b) False
10. 10.🧪 A paper bridge was tested three times. It held 290 g, 150 g and 280 g. What is the mean (average) load it held, in grams?
11. 11.True or false: to skip writing results is good testing. (a) False (b) True
12. 12.True or false: to change lots at once is good testing. (a) False (b) True
13. 13.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) load it with coins (b) read the challenge rules (c) choose and draw one (d) sketch three ideas
14. 14.🧪 Why repeat a test three times? (a) it looks busy (b) to use more paper (c) the first is wrong (d) to get reliable results
15. 15.🧪 In a fair test, how many things do you change at a time? (a) all of them (b) one (c) two (d) none
16. 16.🧪 The first prototype held 200 g. After the team improved it, the new prototype held 330 g. How many more grams did it hold?
17. 17.True or false: to hide a failed test is good testing. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) change only one thing (b) use the same load (c) guess, do not measure (d) repeat each test
19. 19.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to test ideas cheaply (c) to avoid testing (d) to decorate a room
20. 20.🔢 To build and test a straw bridge, which is the LAST step? (a) strengthen the weak part (b) load it with coins (c) read the challenge rules (d) sketch three ideas
21. 21.🧪 What is a prototype? (a) a broken part (b) a sales poster (c) the final product (d) an early test model
22. 22.🧪 The first prototype held 240 g. After the team improved it, the new prototype held 260 g. How many more grams did it hold?
23. 23.🧪 A paper bridge was tested three times. It held 300 g, 200 g and 370 g. What is the mean (average) load it held, in grams?
24. 24.🧪 A paper bridge was tested three times. It held 320 g, 160 g and 180 g. What is the mean (average) load it held, in grams?
25. 25.🔍 Which is the odd one out? (a) repeat each test (b) use the same load (c) use a new load each time (d) record every result
26. 26.🧪 A paper bridge was tested three times. It held 190 g, 90 g and 260 g. What is the mean (average) load it held, in grams?
27. 27.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
28. 28.🧪 Three prototype bridges were tested with the same method. Design A held 100 g, design B held 200 g and design C held 150 g. Which design was the weakest? (a) design B (b) design C (c) design A
29. 29.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 180 g. How many more grams did it hold?
30. 30.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
31. 31.True or false: to hide a failed test is poor testing. (a) False (b) True
32. 32.🧪 A paper bridge was tested three times. It held 410 g, 260 g and 350 g. What is the mean (average) load it held, in grams?
33. 33.🔍 Which is the odd one out? (a) hide a failed test (b) record every result (c) skip writing results (d) change lots at once
34. 34.🧪 Three prototype bridges were tested with the same method. Design A held 350 g, design B held 300 g and design C held 400 g. Which design was the weakest? (a) design C (b) design A (c) design B
35. 35.🔍 Which is the odd one out? (a) test it only once (b) change only one thing (c) hide a failed test (d) use a new load each time
36. 36.🧪 Is it good or poor testing to change only one thing? (a) good testing (b) poor testing
37. 37.🔍 Which is the odd one out? (a) hide a failed test (b) change only one thing (c) use the same load (d) measure the same way
38. 38.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 420 g. How many more grams did it hold?
39. 39.True or false: to measure the same way is poor testing. (a) False (b) True
40. 40.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “sketch three ideas”? (a) sketch three ideas (b) read the challenge rules

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