Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 208 · 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: “read the challenge rules” or “strengthen the weak part”? (a) read the challenge rules (b) strengthen the weak part
2. 2.True or false: to change lots at once is poor testing. (a) True (b) False
3. 3.🧪 In a fair test, how many things do you change at a time? (a) one (b) two (c) none (d) all of them
4. 4.🧪 The first prototype held 70 g. After the team improved it, the new prototype held 160 g. How many more grams did it hold?
5. 5.🧪 The first prototype held 50 g. After the team improved it, the new prototype held 80 g. How many more grams did it hold?
6. 6.True or false: to repeat each test is good testing. (a) False (b) True
7. 7.True or false: to skip writing results is good testing. (a) False (b) True
8. 8.🧪 Three prototype bridges were tested with the same method. Design A held 230 g, design B held 330 g and design C held 280 g. Which design was the strongest? (a) design B (b) design A (c) design C
9. 9.🧪 Three prototype bridges were tested with the same method. Design A held 290 g, design B held 240 g and design C held 340 g. Which design was the strongest? (a) design A (b) design C (c) design B
10. 10.🔢 To build and test a straw bridge, which is the FIRST step? (a) build it with straws (b) strengthen the weak part (c) choose and draw one (d) read the challenge rules
11. 11.🔢 To build and test a straw bridge, which comes first: “sketch three ideas” or “load it with coins”? (a) sketch three ideas (b) load it with coins
12. 12.True or false: to test it only once is poor testing. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) use the same load (b) record every result (c) use a new load each time (d) measure the same way
14. 14.🧪 Three prototype bridges were tested with the same method. Design A held 270 g, design B held 220 g and design C held 170 g. Which design was the weakest? (a) design A (b) design B (c) design C
15. 15.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 270 g. How many more grams did it hold?
16. 16.🧪 Is it good or poor testing to hide a failed test? (a) poor testing (b) good testing
17. 17.True or false: to hide a failed test is good testing. (a) False (b) True
18. 18.🧪 The first prototype held 220 g. After the team improved it, the new prototype held 260 g. How many more grams did it hold?
19. 19.🧪 A paper bridge was tested three times. It held 440 g, 250 g and 330 g. What is the mean (average) load it held, in grams?
20. 20.🧪 Three prototype bridges were tested with the same method. Design A held 260 g, design B held 310 g and design C held 360 g. Which design was the weakest? (a) design C (b) design A (c) design B
21. 21.🧪 The first prototype held 180 g. After the team improved it, the new prototype held 190 g. How many more grams did it hold?
22. 22.🧪 A paper bridge was tested three times. It held 210 g, 150 g and 210 g. What is the mean (average) load it held, in grams?
23. 23.🧪 Three prototype bridges were tested with the same method. Design A held 250 g, design B held 300 g and design C held 350 g. Which design was the strongest? (a) design C (b) design A (c) design B
24. 24.🧪 Three prototype bridges were tested with the same method. Design A held 230 g, design B held 280 g and design C held 330 g. Which design was the strongest? (a) design A (b) design B (c) design C
25. 25.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
26. 26.🔍 Which is the odd one out? (a) change only one thing (b) change lots at once (c) use the same load (d) measure the same way
27. 27.🧪 A paper bridge was tested three times. It held 240 g, 150 g and 330 g. What is the mean (average) load it held, in grams?
28. 28.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) strengthen the weak part (b) build it with straws (c) read the challenge rules (d) choose and draw one
29. 29.🧪 A paper bridge was tested three times. It held 420 g, 340 g and 260 g. What is the mean (average) load it held, in grams?
30. 30.🔢 To build and test a straw bridge, which is the LAST step? (a) load it with coins (b) choose and draw one (c) strengthen the weak part (d) sketch three ideas
31. 31.🧪 A paper bridge was tested three times. It held 390 g, 320 g and 250 g. What is the mean (average) load it held, in grams?
32. 32.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 400 g. How many more grams did it hold?
33. 33.🧪 A paper bridge was tested three times. It held 230 g, 190 g and 180 g. What is the mean (average) load it held, in grams?
34. 34.🧪 The first prototype held 150 g. After the team improved it, the new prototype held 260 g. How many more grams did it hold?
35. 35.🧪 Is it good or poor testing to repeat each test? (a) good testing (b) poor testing
36. 36.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
37. 37.True or false: to guess, do not measure is good testing. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) use a new load each time (b) guess, do not measure (c) change lots at once (d) measure the same way
39. 39.True or false: to change only one thing is good testing. (a) False (b) True
40. 40.🧪 Why repeat a test three times? (a) the first is wrong (b) it looks busy (c) to get reliable results (d) to use more paper

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