Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 395 · 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.🧪 Why repeat a test three times? (a) it looks busy (b) to use more paper (c) to get reliable results (d) the first is wrong
2. 2.🧪 Is it good or poor testing to test it only once? (a) poor testing (b) good testing
3. 3.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) load it with coins (b) build it with straws (c) read the challenge rules (d) choose and draw one
4. 4.🧪 In a fair test, how many things do you change at a time? (a) all of them (b) two (c) one (d) none
5. 5.🧪 Is it good or poor testing to use a new load each time? (a) good testing (b) poor testing
6. 6.🧪 The first prototype held 150 g. After the team improved it, the new prototype held 280 g. How many more grams did it hold?
7. 7.🧪 What is a prototype? (a) a sales poster (b) an early test model (c) the final product (d) a broken part
8. 8.🧪 Three prototype bridges were tested with the same method. Design A held 200 g, design B held 100 g and design C held 150 g. Which design was the weakest? (a) design C (b) design B (c) design A
9. 9.🧪 A paper bridge was tested three times. It held 360 g, 250 g and 410 g. What is the mean (average) load it held, in grams?
10. 10.🧪 The first prototype held 200 g. After the team improved it, the new prototype held 260 g. How many more grams did it hold?
11. 11.🧪 Three prototype bridges were tested with the same method. Design A held 220 g, design B held 270 g and design C held 170 g. Which design was the weakest? (a) design B (b) design A (c) design C
12. 12.True or false: to change lots at once is good testing. (a) False (b) True
13. 13.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
14. 14.🧪 Three prototype bridges were tested with the same method. Design A held 360 g, design B held 260 g and design C held 310 g. Which design was the strongest? (a) design B (b) design A (c) design C
15. 15.🧪 A paper bridge was tested three times. It held 350 g, 310 g and 330 g. What is the mean (average) load it held, in grams?
16. 16.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
17. 17.🔍 Which is the odd one out? (a) repeat each test (b) change only one thing (c) measure the same way (d) change lots at once
18. 18.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “load it with coins”? (a) read the challenge rules (b) load it with coins
19. 19.🧪 A paper bridge was tested three times. It held 310 g, 210 g and 200 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 270 g, design B held 320 g and design C held 220 g. Which design was the weakest? (a) design B (b) design A (c) design C
21. 21.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “strengthen the weak part”? (a) strengthen the weak part (b) load it with coins
22. 22.🧪 Three prototype bridges were tested with the same method. Design A held 290 g, design B held 340 g and design C held 240 g. Which design was the strongest? (a) design A (b) design C (c) design B
23. 23.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) sketch three ideas (b) strengthen the weak part (c) build it with straws (d) read the challenge rules
24. 24.🧪 The first prototype held 160 g. After the team improved it, the new prototype held 180 g. How many more grams did it hold?
25. 25.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
26. 26.🔢 To build and test a straw bridge, which is the LAST step? (a) choose and draw one (b) strengthen the weak part (c) load it with coins (d) build it with straws
27. 27.🧪 Is it good or poor testing to hide a failed test? (a) poor testing (b) good testing
28. 28.True or false: to hide a failed test is poor testing. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) change only one thing (b) measure the same way (c) use the same load (d) skip writing results
30. 30.🔍 Which is the odd one out? (a) record every result (b) repeat each test (c) measure the same way (d) hide a failed test
31. 31.🧪 The first prototype held 50 g. After the team improved it, the new prototype held 180 g. How many more grams did it hold?
32. 32.🧪 The first prototype held 150 g. After the team improved it, the new prototype held 310 g. How many more grams did it hold?
33. 33.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “choose and draw one”? (a) load it with coins (b) choose and draw one
34. 34.🧪 Is it good or poor testing to use the same load? (a) poor testing (b) good testing
35. 35.🧪 The first prototype held 240 g. After the team improved it, the new prototype held 250 g. How many more grams did it hold?
36. 36.🧪 A paper bridge was tested three times. It held 300 g, 250 g and 290 g. What is the mean (average) load it held, in grams?
37. 37.True or false: to guess, do not measure is good testing. (a) True (b) False
38. 38.True or false: to change only one thing is poor testing. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) record every result (b) repeat each test (c) test it only once (d) change only one thing
40. 40.🧪 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

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