Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 225 · 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 do engineers make prototypes? (a) to sell them at once (b) to decorate a room (c) to avoid testing (d) to test ideas cheaply
2. 2.True or false: to change lots at once is poor testing. (a) False (b) True
3. 3.🔢 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
4. 4.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
5. 5.True or false: to guess, do not measure is poor testing. (a) True (b) False
6. 6.True or false: to repeat each test is poor testing. (a) True (b) False
7. 7.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 380 g. How many more grams did it hold?
8. 8.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
9. 9.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 400 g and design C held 350 g. Which design was the strongest? (a) design B (b) design C (c) design A
10. 10.🧪 A paper bridge was tested three times. It held 290 g, 130 g and 240 g. What is the mean (average) load it held, in grams?
11. 11.🧪 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 weakest? (a) design C (b) design B (c) design A
12. 12.True or false: to change only one thing is poor testing. (a) True (b) False
13. 13.🔢 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) choose and draw one (d) read the challenge rules
14. 14.🔍 Which is the odd one out? (a) change only one thing (b) guess, do not measure (c) test it only once (d) hide a failed test
15. 15.True or false: to change lots at once is good testing. (a) False (b) True
16. 16.True or false: to test it only once is good testing. (a) False (b) True
17. 17.🧪 A paper bridge was tested three times. It held 200 g, 120 g and 220 g. What is the mean (average) load it held, in grams?
18. 18.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “load it with coins”? (a) read the challenge rules (b) load it with coins
19. 19.🔍 Which is the odd one out? (a) measure the same way (b) test it only once (c) record every result (d) change only one thing
20. 20.🧪 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
21. 21.🔍 Which is the odd one out? (a) repeat each test (b) change lots at once (c) record every result (d) use the same load
22. 22.🔍 Which is the odd one out? (a) change only one thing (b) record every result (c) measure the same way (d) guess, do not measure
23. 23.🔍 Which is the odd one out? (a) hide a failed test (b) record every result (c) change only one thing (d) measure the same way
24. 24.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “build it with straws”? (a) build it with straws (b) load it with coins
25. 25.🔢 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
26. 26.🧪 Three prototype bridges were tested with the same method. Design A held 120 g, design B held 220 g and design C held 170 g. Which design was the weakest? (a) design B (b) design C (c) design A
27. 27.🧪 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 A (c) design C
28. 28.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
29. 29.🔍 Which is the odd one out? (a) measure the same way (b) skip writing results (c) change lots at once (d) hide a failed test
30. 30.🔢 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) strengthen the weak part (d) sketch three ideas
31. 31.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “read the challenge rules”? (a) strengthen the weak part (b) read the challenge rules
32. 32.🧪 In a fair test, how many things do you change at a time? (a) two (b) one (c) none (d) all of them
33. 33.🧪 The first prototype held 190 g. After the team improved it, the new prototype held 270 g. How many more grams did it hold?
34. 34.True or false: to hide a failed test is poor testing. (a) False (b) True
35. 35.🧪 A paper bridge was tested three times. It held 240 g, 100 g and 230 g. What is the mean (average) load it held, in grams?
36. 36.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) build it with straws (b) load it with coins (c) strengthen the weak part (d) choose and draw one
37. 37.🧪 Three prototype bridges were tested with the same method. Design A held 230 g, design B held 280 g and design C held 180 g. Which design was the weakest? (a) design A (b) design C (c) design B
38. 38.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “read the challenge rules”? (a) choose and draw one (b) read the challenge rules
39. 39.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 250 g. How many more grams did it hold?
40. 40.🔍 Which is the odd one out? (a) change lots at once (b) record every result (c) skip writing results (d) guess, do not measure

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