Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 874 · 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.True or false: to change lots at once is good testing. (a) True (b) False
2. 2.🧪 A paper bridge was tested three times. It held 310 g, 150 g and 170 g. What is the mean (average) load it held, in grams?
3. 3.🧪 Three prototype bridges were tested with the same method. Design A held 290 g, design B held 240 g and design C held 340 g. Which design was the strongest? (a) design C (b) design B (c) design A
4. 4.True or false: to hide a failed test is good testing. (a) False (b) True
5. 5.🧪 Is it good or poor testing to hide a failed test? (a) poor testing (b) good testing
6. 6.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “strengthen the weak part”? (a) strengthen the weak part (b) load it with coins
7. 7.True or false: to repeat each test is good testing. (a) False (b) True
8. 8.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
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.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to decorate a room (c) to sell them at once (d) to test ideas cheaply
11. 11.🧪 A paper bridge was tested three times. It held 220 g, 140 g and 150 g. What is the mean (average) load it held, in grams?
12. 12.🧪 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
13. 13.🔍 Which is the odd one out? (a) measure the same way (b) guess, do not measure (c) repeat each test (d) record every result
14. 14.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
15. 15.🧪 A paper bridge was tested three times. It held 300 g, 130 g and 230 g. What is the mean (average) load it held, in grams?
16. 16.True or false: to use the same load is poor testing. (a) True (b) False
17. 17.🧪 A paper bridge was tested three times. It held 150 g, 130 g and 170 g. What is the mean (average) load it held, in grams?
18. 18.🧪 Three prototype bridges were tested with the same method. Design A held 110 g, design B held 160 g and design C held 210 g. Which design was the strongest? (a) design A (b) design B (c) design C
19. 19.True or false: to repeat each test is poor testing. (a) True (b) False
20. 20.🧪 What is a prototype? (a) a sales poster (b) a broken part (c) the final product (d) an early test model
21. 21.🔍 Which is the odd one out? (a) skip writing results (b) change only one thing (c) change lots at once (d) test it only once
22. 22.🧪 Three prototype bridges were tested with the same method. Design A held 340 g, design B held 290 g and design C held 390 g. Which design was the strongest? (a) design A (b) design B (c) design C
23. 23.🧪 Is it good or poor testing to record every result? (a) good testing (b) poor testing
24. 24.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) sketch three ideas (b) read the challenge rules (c) strengthen the weak part (d) load it with coins
25. 25.🔢 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
26. 26.🧪 The first prototype held 50 g. After the team improved it, the new prototype held 240 g. How many more grams did it hold?
27. 27.True or false: to use a new load each time is good testing. (a) True (b) False
28. 28.🧪 A paper bridge was tested three times. It held 320 g, 280 g and 330 g. What is the mean (average) load it held, in grams?
29. 29.🧪 Three prototype bridges were tested with the same method. Design A held 380 g, design B held 280 g and design C held 330 g. Which design was the strongest? (a) design B (b) design A (c) design C
30. 30.True or false: to test it only once is good testing. (a) True (b) False
31. 31.🧪 The first prototype held 240 g. After the team improved it, the new prototype held 410 g. How many more grams did it hold?
32. 32.🧪 A paper bridge was tested three times. It held 280 g, 200 g and 270 g. What is the mean (average) load it held, in grams?
33. 33.🧪 Three prototype bridges were tested with the same method. Design A held 270 g, design B held 170 g and design C held 220 g. Which design was the weakest? (a) design B (b) design A (c) design C
34. 34.🧪 Is it good or poor testing to change only one thing? (a) good testing (b) poor testing
35. 35.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 320 g. How many more grams did it hold?
36. 36.🧪 Is it good or poor testing to change lots at once? (a) good testing (b) poor testing
37. 37.🔍 Which is the odd one out? (a) use the same load (b) test it only once (c) guess, do not measure (d) change lots at once
38. 38.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “strengthen the weak part”? (a) choose and draw one (b) strengthen the weak part
39. 39.🧪 In a fair test, how many things do you change at a time? (a) none (b) one (c) two (d) all of them
40. 40.🧪 A paper bridge was tested three times. It held 370 g, 270 g and 410 g. What is the mean (average) load it held, in grams?

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