Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 79 · 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.🔍 Which is the odd one out? (a) change lots at once (b) repeat each test (c) guess, do not measure (d) hide a failed test
2. 2.🧪 A paper bridge was tested three times. It held 180 g, 100 g and 200 g. What is the mean (average) load it held, in grams?
3. 3.🔢 To build and test a straw bridge, which is the FIRST step? (a) sketch three ideas (b) read the challenge rules (c) choose and draw one (d) build it with straws
4. 4.🔍 Which is the odd one out? (a) hide a failed test (b) change lots at once (c) use the same load (d) test it only once
5. 5.🔢 To build and test a straw bridge, which is the LAST step? (a) choose and draw one (b) read the challenge rules (c) strengthen the weak part (d) load it with coins
6. 6.🧪 In a fair test, how many things do you change at a time? (a) none (b) one (c) all of them (d) two
7. 7.🧪 What is a prototype? (a) a broken part (b) an early test model (c) the final product (d) a sales poster
8. 8.True or false: to guess, do not measure is good testing. (a) True (b) False
9. 9.🧪 A paper bridge was tested three times. It held 320 g, 320 g and 320 g. What is the mean (average) load it held, in grams?
10. 10.🔍 Which is the odd one out? (a) repeat each test (b) use a new load each time (c) change only one thing (d) measure the same way
11. 11.🧪 Three prototype bridges were tested with the same method. Design A held 310 g, design B held 360 g and design C held 260 g. Which design was the strongest? (a) design B (b) design A (c) design C
12. 12.True or false: to use a new load each time is good testing. (a) False (b) True
13. 13.🧪 A paper bridge was tested three times. It held 380 g, 250 g and 330 g. What is the mean (average) load it held, in grams?
14. 14.🧪 Is it good or poor testing to measure the same way? (a) good testing (b) poor testing
15. 15.🧪 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
16. 16.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
17. 17.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) load it with coins (b) strengthen the weak part (c) choose and draw one (d) read the challenge rules
18. 18.🧪 A paper bridge was tested three times. It held 330 g, 140 g and 220 g. What is the mean (average) load it held, in grams?
19. 19.🧪 Is it good or poor testing to change only one thing? (a) good testing (b) poor testing
20. 20.🧪 A paper bridge was tested three times. It held 250 g, 130 g and 100 g. What is the mean (average) load it held, in grams?
21. 21.True or false: to use a new load each time is poor testing. (a) True (b) False
22. 22.🧪 A paper bridge was tested three times. It held 250 g, 210 g and 170 g. What is the mean (average) load it held, in grams?
23. 23.True or false: to record every result is good testing. (a) True (b) False
24. 24.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
25. 25.🧪 A paper bridge was tested three times. It held 420 g, 230 g and 310 g. What is the mean (average) load it held, in grams?
26. 26.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “read the challenge rules”? (a) read the challenge rules (b) choose and draw one
27. 27.🔍 Which is the odd one out? (a) change only one thing (b) hide a failed test (c) measure the same way (d) use the same load
28. 28.🧪 Three prototype bridges were tested with the same method. Design A held 200 g, design B held 100 g and design C held 150 g. Which design was the strongest? (a) design C (b) design B (c) design A
29. 29.True or false: to change only one thing is good testing. (a) False (b) True
30. 30.🧪 A paper bridge was tested three times. It held 350 g, 180 g and 220 g. What is the mean (average) load it held, in grams?
31. 31.🧪 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?
32. 32.🧪 Three prototype bridges were tested with the same method. Design A held 200 g, design B held 150 g and design C held 100 g. Which design was the weakest? (a) design C (b) design B (c) design A
33. 33.🧪 Why repeat a test three times? (a) it looks busy (b) to get reliable results (c) the first is wrong (d) to use more paper
34. 34.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) load it with coins (b) strengthen the weak part (c) build it with straws (d) sketch three ideas
35. 35.🧪 The first prototype held 180 g. After the team improved it, the new prototype held 370 g. How many more grams did it hold?
36. 36.True or false: to repeat each test is poor testing. (a) False (b) True
37. 37.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “build it with straws”? (a) build it with straws (b) choose and draw one
38. 38.🔢 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
39. 39.🔢 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) load it with coins (d) strengthen the weak part
40. 40.🧪 A paper bridge was tested three times. It held 330 g, 240 g and 390 g. What is the mean (average) load it held, in grams?

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