Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 447 · 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, 70 g and 190 g. What is the mean (average) load it held, in grams?
2. 2.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
3. 3.🧪 The first prototype held 100 g. After the team improved it, the new prototype held 160 g. How many more grams did it hold?
4. 4.🧪 Three prototype bridges were tested with the same method. Design A held 240 g, design B held 340 g and design C held 290 g. Which design was the weakest? (a) design C (b) design B (c) design A
5. 5.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “sketch three ideas”? (a) sketch three ideas (b) read the challenge rules
6. 6.🧪 Is it good or poor testing to record every result? (a) good testing (b) poor testing
7. 7.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “sketch three ideas”? (a) sketch three ideas (b) build it with straws
8. 8.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
9. 9.🔍 Which is the odd one out? (a) test it only once (b) use the same load (c) repeat each test (d) change only one thing
10. 10.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
11. 11.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 140 g. How many more grams did it hold?
12. 12.🔍 Which is the odd one out? (a) use a new load each time (b) guess, do not measure (c) repeat each test (d) change lots at once
13. 13.🧪 Is it good or poor testing to measure the same way? (a) good testing (b) poor testing
14. 14.🔍 Which is the odd one out? (a) use a new load each time (b) guess, do not measure (c) hide a failed test (d) change only one thing
15. 15.True or false: to use the same load is good testing. (a) False (b) True
16. 16.True or false: to measure the same way is poor testing. (a) False (b) True
17. 17.🧪 Why repeat a test three times? (a) to get reliable results (b) to use more paper (c) the first is wrong (d) it looks busy
18. 18.🧪 A paper bridge was tested three times. It held 250 g, 160 g and 280 g. What is the mean (average) load it held, in grams?
19. 19.🔍 Which is the odd one out? (a) record every result (b) repeat each test (c) change only one thing (d) skip writing results
20. 20.🧪 A paper bridge was tested three times. It held 430 g, 300 g and 290 g. What is the mean (average) load it held, in grams?
21. 21.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
22. 22.🧪 A paper bridge was tested three times. It held 190 g, 90 g and 290 g. What is the mean (average) load it held, in grams?
23. 23.True or false: to hide a failed test is good testing. (a) True (b) False
24. 24.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) strengthen the weak part (b) load it with coins (c) build it with straws (d) choose and draw one
25. 25.🧪 A paper bridge was tested three times. It held 310 g, 130 g and 250 g. What is the mean (average) load it held, in grams?
26. 26.🧪 What is a prototype? (a) a sales poster (b) a broken part (c) the final product (d) an early test model
27. 27.🧪 In a fair test, how many things do you change at a time? (a) none (b) two (c) all of them (d) one
28. 28.True or false: to change only one thing is poor testing. (a) False (b) True
29. 29.🔢 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
30. 30.🧪 The first prototype held 160 g. After the team improved it, the new prototype held 220 g. How many more grams did it hold?
31. 31.🔍 Which is the odd one out? (a) use a new load each time (b) change lots at once (c) use the same load (d) skip writing results
32. 32.🧪 Why do engineers make prototypes? (a) to test ideas cheaply (b) to sell them at once (c) to decorate a room (d) to avoid testing
33. 33.🧪 The first prototype held 190 g. After the team improved it, the new prototype held 210 g. How many more grams did it hold?
34. 34.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) strengthen the weak part (b) sketch three ideas (c) choose and draw one (d) build it with straws
35. 35.True or false: to guess, do not measure is good testing. (a) True (b) False
36. 36.🔢 To build and test a straw bridge, what comes right after “load it with coins”? (a) sketch three ideas (b) read the challenge rules (c) build it with straws (d) strengthen the weak part
37. 37.🔢 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) sketch three ideas (d) load it with coins
38. 38.True or false: to skip writing results is good testing. (a) True (b) False
39. 39.True or false: to hide a failed test is poor testing. (a) False (b) True
40. 40.🧪 The first prototype held 240 g. After the team improved it, the new prototype held 280 g. How many more grams did it hold?

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