Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 745 · 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.🧪 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 weakest? (a) design A (b) design C (c) design B
2. 2.🔢 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
3. 3.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
4. 4.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
5. 5.🧪 What is a prototype? (a) the final product (b) a sales poster (c) a broken part (d) an early test model
6. 6.True or false: to test it only once is poor testing. (a) True (b) False
7. 7.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 350 g. How many more grams did it hold?
8. 8.🧪 A paper bridge was tested three times. It held 220 g, 100 g and 160 g. What is the mean (average) load it held, in grams?
9. 9.🔍 Which is the odd one out? (a) measure the same way (b) use the same load (c) use a new load each time (d) change only one thing
10. 10.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) read the challenge rules (b) build it with straws (c) strengthen the weak part (d) sketch three ideas
11. 11.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “load it with coins”? (a) strengthen the weak part (b) load it with coins
12. 12.🧪 Why repeat a test three times? (a) to get reliable results (b) the first is wrong (c) it looks busy (d) to use more paper
13. 13.🔍 Which is the odd one out? (a) change only one thing (b) use a new load each time (c) change lots at once (d) skip writing results
14. 14.🔍 Which is the odd one out? (a) record every result (b) measure the same way (c) change only one thing (d) test it only once
15. 15.True or false: to change lots at once is poor testing. (a) False (b) True
16. 16.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “build it with straws”? (a) load it with coins (b) build it with straws
17. 17.🧪 A paper bridge was tested three times. It held 290 g, 140 g and 200 g. What is the mean (average) load it held, in grams?
18. 18.🧪 A paper bridge was tested three times. It held 250 g, 230 g and 240 g. What is the mean (average) load it held, in grams?
19. 19.True or false: to guess, do not measure is good testing. (a) True (b) False
20. 20.🔢 To build and test a straw bridge, which is the LAST step? (a) strengthen the weak part (b) choose and draw one (c) build it with straws (d) sketch three ideas
21. 21.🧪 The first prototype held 200 g. After the team improved it, the new prototype held 370 g. How many more grams did it hold?
22. 22.🧪 Is it good or poor testing to guess, do not measure? (a) good testing (b) poor testing
23. 23.🧪 Is it good or poor testing to change only one thing? (a) good testing (b) poor testing
24. 24.🧪 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 C (c) design A
25. 25.True or false: to test it only once is good testing. (a) False (b) True
26. 26.True or false: to repeat each test is poor testing. (a) True (b) False
27. 27.🧪 Three prototype bridges were tested with the same method. Design A held 100 g, design B held 150 g and design C held 200 g. Which design was the weakest? (a) design B (b) design C (c) design A
28. 28.🧪 Three prototype bridges were tested with the same method. Design A held 280 g, design B held 230 g and design C held 330 g. Which design was the strongest? (a) design A (b) design B (c) design C
29. 29.🔢 To build and test a straw bridge, which is the FIRST step? (a) read the challenge rules (b) build it with straws (c) load it with coins (d) strengthen the weak part
30. 30.🔢 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
31. 31.🧪 In a fair test, how many things do you change at a time? (a) two (b) all of them (c) none (d) one
32. 32.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 390 g. How many more grams did it hold?
33. 33.🧪 Is it good or poor testing to hide a failed test? (a) poor testing (b) good testing
34. 34.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to test ideas cheaply (c) to avoid testing (d) to decorate a room
35. 35.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
36. 36.🧪 The first prototype held 70 g. After the team improved it, the new prototype held 110 g. How many more grams did it hold?
37. 37.🧪 The first prototype held 160 g. After the team improved it, the new prototype held 350 g. How many more grams did it hold?
38. 38.🔍 Which is the odd one out? (a) change lots at once (b) skip writing results (c) repeat each test (d) use a new load each time
39. 39.True or false: to change only one thing is poor testing. (a) True (b) False
40. 40.🧪 A paper bridge was tested three times. It held 380 g, 260 g and 290 g. What is the mean (average) load it held, in grams?

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