Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 115 · 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.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 130 g. How many more grams did it hold?
2. 2.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) strengthen the weak part (b) load it with coins (c) build it with straws (d) sketch three ideas
3. 3.True or false: to hide a failed test is good testing. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) change lots at once (b) skip writing results (c) test it only once (d) record every result
5. 5.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 390 g. How many more grams did it hold?
6. 6.True or false: to measure the same way is good testing. (a) True (b) False
7. 7.🧪 Three prototype bridges were tested with the same method. Design A held 290 g, design B held 240 g and design C held 190 g. Which design was the strongest? (a) design A (b) design C (c) design B
8. 8.🔍 Which is the odd one out? (a) guess, do not measure (b) change only one thing (c) use a new load each time (d) change lots at once
9. 9.True or false: to change only one thing is good testing. (a) True (b) False
10. 10.🧪 In a fair test, how many things do you change at a time? (a) one (b) none (c) all of them (d) two
11. 11.🧪 Is it good or poor testing to repeat each test? (a) poor testing (b) good testing
12. 12.🧪 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
13. 13.🔍 Which is the odd one out? (a) use the same load (b) skip writing results (c) guess, do not measure (d) use a new load each time
14. 14.🧪 A paper bridge was tested three times. It held 260 g, 80 g and 200 g. What is the mean (average) load it held, in grams?
15. 15.🧪 Three prototype bridges were tested with the same method. Design A held 320 g, design B held 270 g and design C held 220 g. Which design was the weakest? (a) design C (b) design B (c) design A
16. 16.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 260 g. How many more grams did it hold?
17. 17.🧪 A paper bridge was tested three times. It held 390 g, 270 g and 270 g. What is the mean (average) load it held, in grams?
18. 18.🔍 Which is the odd one out? (a) use a new load each time (b) change only one thing (c) measure the same way (d) record every result
19. 19.🔍 Which is the odd one out? (a) record every result (b) change only one thing (c) test it only once (d) measure the same way
20. 20.True or false: to guess, do not measure is good testing. (a) False (b) True
21. 21.🧪 A paper bridge was tested three times. It held 170 g, 140 g and 200 g. What is the mean (average) load it held, in grams?
22. 22.🧪 The first prototype held 90 g. After the team improved it, the new prototype held 140 g. How many more grams did it hold?
23. 23.🧪 Why repeat a test three times? (a) to get reliable results (b) it looks busy (c) the first is wrong (d) to use more paper
24. 24.🧪 Three prototype bridges were tested with the same method. Design A held 260 g, design B held 210 g and design C held 160 g. Which design was the strongest? (a) design C (b) design A (c) design B
25. 25.True or false: to use a new load each time is good testing. (a) True (b) False
26. 26.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
27. 27.🔍 Which is the odd one out? (a) use a new load each time (b) measure the same way (c) guess, do not measure (d) change lots at once
28. 28.True or false: to repeat each test is good testing. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) use a new load each time (b) hide a failed test (c) guess, do not measure (d) repeat each test
30. 30.🔢 To build and test a straw bridge, which is the FIRST step? (a) read the challenge rules (b) sketch three ideas (c) build it with straws (d) load it with coins
31. 31.🧪 A paper bridge was tested three times. It held 380 g, 250 g and 240 g. What is the mean (average) load it held, in grams?
32. 32.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 200 g. How many more grams did it hold?
33. 33.🧪 Three prototype bridges were tested with the same method. Design A held 280 g, design B held 330 g and design C held 230 g. Which design was the weakest? (a) design B (b) design C (c) design A
34. 34.🧪 Is it good or poor testing to measure the same way? (a) good testing (b) poor testing
35. 35.🧪 Three prototype bridges were tested with the same method. Design A held 280 g, design B held 330 g and design C held 380 g. Which design was the weakest? (a) design B (b) design C (c) design A
36. 36.True or false: to use the same load is good testing. (a) False (b) True
37. 37.True or false: to use the same load is poor testing. (a) True (b) False
38. 38.🔢 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
39. 39.🧪 A paper bridge was tested three times. It held 220 g, 130 g and 220 g. What is the mean (average) load it held, in grams?
40. 40.🧪 A paper bridge was tested three times. It held 260 g, 100 g and 180 g. What is the mean (average) load it held, in grams?

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