Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 334 · 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: “read the challenge rules” or “build it with straws”? (a) build it with straws (b) read the challenge rules
2. 2.🧪 A paper bridge was tested three times. It held 390 g, 230 g and 370 g. What is the mean (average) load it held, in grams?
3. 3.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “read the challenge rules”? (a) load it with coins (b) read the challenge rules
4. 4.🧪 A paper bridge was tested three times. It held 300 g, 200 g and 160 g. What is the mean (average) load it held, in grams?
5. 5.🧪 A paper bridge was tested three times. It held 380 g, 260 g and 200 g. What is the mean (average) load it held, in grams?
6. 6.True or false: to change lots at once is good testing. (a) False (b) True
7. 7.🧪 What is a prototype? (a) a broken part (b) a sales poster (c) an early test model (d) the final product
8. 8.🔍 Which is the odd one out? (a) measure the same way (b) hide a failed test (c) record every result (d) change only one thing
9. 9.🧪 A paper bridge was tested three times. It held 260 g, 110 g and 140 g. What is the mean (average) load it held, in grams?
10. 10.🔍 Which is the odd one out? (a) skip writing results (b) record every result (c) use a new load each time (d) test it only once
11. 11.🧪 Why repeat a test three times? (a) to get reliable results (b) to use more paper (c) it looks busy (d) the first is wrong
12. 12.🧪 A paper bridge was tested three times. It held 350 g, 270 g and 250 g. What is the mean (average) load it held, in grams?
13. 13.🧪 Why do engineers make prototypes? (a) to decorate a room (b) to sell them at once (c) to test ideas cheaply (d) to avoid testing
14. 14.True or false: to test it only once is poor testing. (a) True (b) False
15. 15.True or false: to record every result is good testing. (a) True (b) False
16. 16.🧪 Three prototype bridges were tested with the same method. Design A held 260 g, design B held 160 g and design C held 210 g. Which design was the weakest? (a) design C (b) design A (c) design B
17. 17.True or false: to hide a failed test is good testing. (a) False (b) True
18. 18.🧪 Is it good or poor testing to change lots at once? (a) good testing (b) poor testing
19. 19.🧪 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 weakest? (a) design C (b) design A (c) design B
20. 20.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
21. 21.🧪 A paper bridge was tested three times. It held 150 g, 80 g and 220 g. What is the mean (average) load it held, in grams?
22. 22.🧪 The first prototype held 180 g. After the team improved it, the new prototype held 220 g. How many more grams did it hold?
23. 23.🔢 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
24. 24.True or false: to measure the same way is good testing. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) record every result (b) test it only once (c) change only one thing (d) repeat each test
26. 26.🧪 The first prototype held 160 g. After the team improved it, the new prototype held 280 g. How many more grams did it hold?
27. 27.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
28. 28.True or false: to guess, do not measure is good testing. (a) True (b) False
29. 29.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “sketch three ideas”? (a) sketch three ideas (b) choose and draw one
30. 30.🔢 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
31. 31.🧪 In a fair test, how many things do you change at a time? (a) two (b) one (c) all of them (d) none
32. 32.🧪 A paper bridge was tested three times. It held 350 g, 250 g and 150 g. What is the mean (average) load it held, in grams?
33. 33.🔍 Which is the odd one out? (a) repeat each test (b) change only one thing (c) skip writing results (d) record every result
34. 34.🧪 A paper bridge was tested three times. It held 400 g, 260 g and 390 g. What is the mean (average) load it held, in grams?
35. 35.True or false: to guess, do not measure is poor testing. (a) True (b) False
36. 36.🧪 The first prototype held 200 g. After the team improved it, the new prototype held 260 g. How many more grams did it hold?
37. 37.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
38. 38.🧪 Is it good or poor testing to repeat each test? (a) good testing (b) poor testing
39. 39.🧪 The first prototype held 280 g. After the team improved it, the new prototype held 400 g. How many more grams did it hold?
40. 40.🧪 A paper bridge was tested three times. It held 290 g, 220 g and 210 g. What is the mean (average) load it held, in grams?

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