Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 224 · 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: “sketch three ideas” or “build it with straws”? (a) build it with straws (b) sketch three ideas
2. 2.🧪 Is it good or poor testing to measure the same way? (a) good testing (b) poor testing
3. 3.🧪 In a fair test, how many things do you change at a time? (a) two (b) none (c) all of them (d) one
4. 4.🧪 A paper bridge was tested three times. It held 220 g, 180 g and 260 g. What is the mean (average) load it held, in grams?
5. 5.🧪 A paper bridge was tested three times. It held 170 g, 110 g and 230 g. What is the mean (average) load it held, in grams?
6. 6.🧪 A paper bridge was tested three times. It held 280 g, 100 g and 160 g. What is the mean (average) load it held, in grams?
7. 7.🧪 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
8. 8.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
9. 9.🔢 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
10. 10.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
11. 11.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
12. 12.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “strengthen the weak part”? (a) strengthen the weak part (b) read the challenge rules
13. 13.🔢 To build and test a straw bridge, which is the FIRST step? (a) read the challenge rules (b) build it with straws (c) sketch three ideas (d) choose and draw one
14. 14.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “sketch three ideas”? (a) load it with coins (b) sketch three ideas
15. 15.🧪 Why do engineers make prototypes? (a) to test ideas cheaply (b) to sell them at once (c) to avoid testing (d) to decorate a room
16. 16.🧪 The first prototype held 120 g. After the team improved it, the new prototype held 250 g. How many more grams did it hold?
17. 17.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
18. 18.🔍 Which is the odd one out? (a) change only one thing (b) record every result (c) repeat each test (d) guess, do not measure
19. 19.🧪 What is a prototype? (a) a broken part (b) a sales poster (c) the final product (d) an early test model
20. 20.🔍 Which is the odd one out? (a) repeat each test (b) use the same load (c) change only one thing (d) use a new load each time
21. 21.🧪 The first prototype held 70 g. After the team improved it, the new prototype held 130 g. How many more grams did it hold?
22. 22.🧪 A paper bridge was tested three times. It held 160 g, 50 g and 240 g. What is the mean (average) load it held, in grams?
23. 23.🔍 Which is the odd one out? (a) test it only once (b) change lots at once (c) record every result (d) use a new load each time
24. 24.🧪 A paper bridge was tested three times. It held 260 g, 120 g and 130 g. What is the mean (average) load it held, in grams?
25. 25.🧪 The first prototype held 280 g. After the team improved it, the new prototype held 370 g. How many more grams did it hold?
26. 26.🧪 Three prototype bridges were tested with the same method. Design A held 200 g, design B held 250 g and design C held 300 g. Which design was the weakest? (a) design C (b) design B (c) design A
27. 27.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “read the challenge rules”? (a) sketch three ideas (b) read the challenge rules
28. 28.True or false: to measure the same way is good testing. (a) True (b) False
29. 29.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
30. 30.True or false: to change lots at once is good testing. (a) False (b) True
31. 31.🧪 A paper bridge was tested three times. It held 150 g, 100 g and 200 g. What is the mean (average) load it held, in grams?
32. 32.🧪 The first prototype held 180 g. After the team improved it, the new prototype held 370 g. How many more grams did it hold?
33. 33.True or false: to hide a failed test is poor testing. (a) False (b) True
34. 34.🧪 A paper bridge was tested three times. It held 290 g, 210 g and 160 g. What is the mean (average) load it held, in grams?
35. 35.🔢 To build and test a straw bridge, which is the LAST step? (a) build it with straws (b) choose and draw one (c) read the challenge rules (d) strengthen the weak part
36. 36.🧪 The first prototype held 240 g. After the team improved it, the new prototype held 350 g. How many more grams did it hold?
37. 37.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
38. 38.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
39. 39.True or false: to repeat each test is good testing. (a) False (b) True
40. 40.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing

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