Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 255 · 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.🧪 A paper bridge was tested three times. It held 250 g, 140 g and 90 g. What is the mean (average) load it held, in grams?
2. 2.🔍 Which is the odd one out? (a) change lots at once (b) change only one thing (c) repeat each test (d) use the same load
3. 3.🔢 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
4. 4.True or false: to change lots at once is poor testing. (a) True (b) False
5. 5.🧪 Is it good or poor testing to record every result? (a) good testing (b) poor testing
6. 6.🧪 A paper bridge was tested three times. It held 170 g, 130 g and 210 g. What is the mean (average) load it held, in grams?
7. 7.True or false: to record every result is poor testing. (a) False (b) True
8. 8.🧪 A paper bridge was tested three times. It held 310 g, 180 g and 170 g. What is the mean (average) load it held, in grams?
9. 9.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
10. 10.🔍 Which is the odd one out? (a) use a new load each time (b) change lots at once (c) repeat each test (d) hide a failed test
11. 11.🧪 In a fair test, how many things do you change at a time? (a) one (b) none (c) two (d) all of them
12. 12.🔍 Which is the odd one out? (a) measure the same way (b) test it only once (c) use a new load each time (d) change lots at once
13. 13.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 330 g. How many more grams did it hold?
14. 14.🧪 Why repeat a test three times? (a) to use more paper (b) the first is wrong (c) to get reliable results (d) it looks busy
15. 15.🧪 What is a prototype? (a) a broken part (b) a sales poster (c) the final product (d) an early test model
16. 16.True or false: to measure the same way is good testing. (a) True (b) False
17. 17.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
18. 18.True or false: to hide a failed test is poor testing. (a) False (b) True
19. 19.🧪 Why do engineers make prototypes? (a) to decorate a room (b) to avoid testing (c) to sell them at once (d) to test ideas cheaply
20. 20.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) strengthen the weak part (b) build it with straws (c) sketch three ideas (d) load it with coins
21. 21.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
22. 22.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “load it with coins”? (a) build it with straws (b) load it with coins
23. 23.🧪 Three prototype bridges were tested with the same method. Design A held 370 g, design B held 270 g and design C held 320 g. Which design was the weakest? (a) design A (b) design C (c) design B
24. 24.True or false: to use a new load each time is good testing. (a) False (b) True
25. 25.🧪 The first prototype held 120 g. After the team improved it, the new prototype held 150 g. How many more grams did it hold?
26. 26.True or false: to record every result is good testing. (a) False (b) True
27. 27.🔢 To build and test a straw bridge, which is the FIRST step? (a) sketch three ideas (b) choose and draw one (c) build it with straws (d) read the challenge rules
28. 28.🧪 Three prototype bridges were tested with the same method. Design A held 170 g, design B held 220 g and design C held 270 g. Which design was the weakest? (a) design C (b) design B (c) design A
29. 29.🧪 Is it good or poor testing to guess, do not measure? (a) good testing (b) poor testing
30. 30.🧪 Three prototype bridges were tested with the same method. Design A held 400 g, design B held 350 g and design C held 300 g. Which design was the strongest? (a) design C (b) design B (c) design A
31. 31.🧪 A paper bridge was tested three times. It held 220 g, 150 g and 290 g. What is the mean (average) load it held, in grams?
32. 32.True or false: to test it only once is good testing. (a) False (b) True
33. 33.🧪 Is it good or poor testing to repeat each test? (a) good testing (b) poor testing
34. 34.True or false: to use a new load each time is poor testing. (a) False (b) True
35. 35.🧪 A paper bridge was tested three times. It held 220 g, 180 g and 170 g. What is the mean (average) load it held, in grams?
36. 36.🧪 The first prototype held 110 g. After the team improved it, the new prototype held 140 g. How many more grams did it hold?
37. 37.🧪 A paper bridge was tested three times. It held 370 g, 280 g and 190 g. What is the mean (average) load it held, in grams?
38. 38.True or false: to change lots at once is good testing. (a) False (b) True
39. 39.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 250 g and design C held 200 g. Which design was the strongest? (a) design B (b) design A (c) design C
40. 40.🧪 The first prototype held 90 g. After the team improved it, the new prototype held 230 g. How many more grams did it hold?

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