Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 39 · 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.True or false: to change only one thing is good testing. (a) True (b) False
2. 2.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 170 g. How many more grams did it hold?
3. 3.🧪 Is it good or poor testing to record every result? (a) good testing (b) poor testing
4. 4.🧪 Is it good or poor testing to use a new load each time? (a) poor testing (b) good testing
5. 5.🧪 The first prototype held 150 g. After the team improved it, the new prototype held 170 g. How many more grams did it hold?
6. 6.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to test ideas cheaply (c) to sell them at once (d) to decorate a room
7. 7.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) sketch three ideas (b) build it with straws (c) choose and draw one (d) strengthen the weak part
8. 8.🧪 A paper bridge was tested three times. It held 300 g, 170 g and 310 g. What is the mean (average) load it held, in grams?
9. 9.🧪 Three prototype bridges were tested with the same method. Design A held 210 g, design B held 160 g and design C held 260 g. Which design was the strongest? (a) design B (b) design C (c) design A
10. 10.True or false: to measure the same way is poor testing. (a) True (b) False
11. 11.True or false: to change only one thing is poor testing. (a) True (b) False
12. 12.True or false: to use the same load is poor testing. (a) True (b) False
13. 13.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
14. 14.🧪 A paper bridge was tested three times. It held 180 g, 130 g and 170 g. What is the mean (average) load it held, in grams?
15. 15.🔍 Which is the odd one out? (a) use the same load (b) use a new load each time (c) skip writing results (d) change lots at once
16. 16.🔍 Which is the odd one out? (a) use a new load each time (b) record every result (c) repeat each test (d) use the same load
17. 17.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
18. 18.🧪 Is it good or poor testing to hide a failed test? (a) good testing (b) poor testing
19. 19.🧪 What is a prototype? (a) the final product (b) a sales poster (c) a broken part (d) an early test model
20. 20.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) build it with straws (b) choose and draw one (c) load it with coins (d) read the challenge rules
21. 21.🧪 A paper bridge was tested three times. It held 330 g, 250 g and 380 g. What is the mean (average) load it held, in grams?
22. 22.True or false: to guess, do not measure is good testing. (a) True (b) False
23. 23.🧪 In a fair test, how many things do you change at a time? (a) all of them (b) two (c) one (d) none
24. 24.🧪 The first prototype held 120 g. After the team improved it, the new prototype held 260 g. How many more grams did it hold?
25. 25.True or false: to test it only once is poor testing. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) use the same load (b) record every result (c) change lots at once (d) measure the same way
27. 27.🔢 To build and test a straw bridge, which is the LAST step? (a) choose and draw one (b) strengthen the weak part (c) sketch three ideas (d) build it with straws
28. 28.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) load it with coins (b) strengthen the weak part (c) build it with straws (d) sketch three ideas
29. 29.🧪 A paper bridge was tested three times. It held 270 g, 130 g and 110 g. What is the mean (average) load it held, in grams?
30. 30.🧪 A paper bridge was tested three times. It held 310 g, 210 g and 110 g. What is the mean (average) load it held, in grams?
31. 31.True or false: to repeat each test is good testing. (a) True (b) False
32. 32.🧪 Why repeat a test three times? (a) it looks busy (b) to use more paper (c) the first is wrong (d) to get reliable results
33. 33.🧪 A paper bridge was tested three times. It held 340 g, 250 g and 160 g. What is the mean (average) load it held, in grams?
34. 34.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 450 g. How many more grams did it hold?
35. 35.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 200 g. How many more grams did it hold?
36. 36.🧪 A paper bridge was tested three times. It held 250 g, 110 g and 150 g. What is the mean (average) load it held, in grams?
37. 37.🔍 Which is the odd one out? (a) hide a failed test (b) repeat each test (c) test it only once (d) change lots at once
38. 38.True or false: to change lots at once is good testing. (a) False (b) True
39. 39.True or false: to use a new load each time is good testing. (a) False (b) True
40. 40.🧪 A paper bridge was tested three times. It held 280 g, 180 g and 320 g. What is the mean (average) load it held, in grams?

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