Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 21 · 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 do engineers make prototypes? (a) to decorate a room (b) to test ideas cheaply (c) to sell them at once (d) to avoid testing
2. 2.🧪 The first prototype held 240 g. After the team improved it, the new prototype held 430 g. How many more grams did it hold?
3. 3.True or false: to change only one thing is poor testing. (a) True (b) False
4. 4.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
5. 5.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
6. 6.True or false: to repeat each test is good testing. (a) True (b) False
7. 7.True or false: to hide a failed test is good testing. (a) True (b) False
8. 8.🧪 A paper bridge was tested three times. It held 240 g, 180 g and 180 g. What is the mean (average) load it held, in grams?
9. 9.🔢 To build and test a straw bridge, which is the LAST step? (a) strengthen the weak part (b) sketch three ideas (c) read the challenge rules (d) load it with coins
10. 10.🧪 Three prototype bridges were tested with the same method. Design A held 220 g, design B held 170 g and design C held 120 g. Which design was the weakest? (a) design C (b) design A (c) design B
11. 11.🧪 The first prototype held 160 g. After the team improved it, the new prototype held 330 g. How many more grams did it hold?
12. 12.🧪 A paper bridge was tested three times. It held 200 g, 120 g and 160 g. What is the mean (average) load it held, in grams?
13. 13.🧪 In a fair test, how many things do you change at a time? (a) none (b) one (c) all of them (d) two
14. 14.True or false: to skip writing results is poor testing. (a) False (b) True
15. 15.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) build it with straws (b) sketch three ideas (c) load it with coins (d) choose and draw one
16. 16.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 320 g. How many more grams did it hold?
17. 17.🧪 Is it good or poor testing to test it only once? (a) poor testing (b) good testing
18. 18.🔍 Which is the odd one out? (a) guess, do not measure (b) change lots at once (c) measure the same way (d) use a new load each time
19. 19.🧪 Is it good or poor testing to skip writing results? (a) poor testing (b) good testing
20. 20.🔢 To build and test a straw bridge, which is the FIRST step? (a) read the challenge rules (b) sketch three ideas (c) choose and draw one (d) build it with straws
21. 21.🔍 Which is the odd one out? (a) record every result (b) change lots at once (c) hide a failed test (d) guess, do not measure
22. 22.🔢 To build and test a straw bridge, what comes right after “build it with straws”? (a) load it with coins (b) sketch three ideas (c) read the challenge rules (d) strengthen the weak part
23. 23.🧪 Is it good or poor testing to change lots at once? (a) good testing (b) poor testing
24. 24.🔍 Which is the odd one out? (a) change lots at once (b) measure the same way (c) repeat each test (d) use the same load
25. 25.🔍 Which is the odd one out? (a) repeat each test (b) change lots at once (c) use a new load each time (d) hide a failed test
26. 26.🧪 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 A (b) design C (c) design B
27. 27.🧪 Why repeat a test three times? (a) the first is wrong (b) to use more paper (c) it looks busy (d) to get reliable results
28. 28.🧪 A paper bridge was tested three times. It held 380 g, 270 g and 370 g. What is the mean (average) load it held, in grams?
29. 29.🧪 A paper bridge was tested three times. It held 160 g, 100 g and 220 g. What is the mean (average) load it held, in grams?
30. 30.🧪 A paper bridge was tested three times. It held 320 g, 220 g and 240 g. What is the mean (average) load it held, in grams?
31. 31.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 400 g and design C held 350 g. Which design was the strongest? (a) design A (b) design B (c) design C
32. 32.🧪 Three prototype bridges were tested with the same method. Design A held 340 g, design B held 290 g and design C held 240 g. Which design was the weakest? (a) design C (b) design A (c) design B
33. 33.🧪 What is a prototype? (a) a sales poster (b) an early test model (c) the final product (d) a broken part
34. 34.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 280 g. How many more grams did it hold?
35. 35.🧪 The first prototype held 220 g. After the team improved it, the new prototype held 360 g. How many more grams did it hold?
36. 36.🧪 A paper bridge was tested three times. It held 400 g, 210 g and 320 g. What is the mean (average) load it held, in grams?
37. 37.🧪 The first prototype held 150 g. After the team improved it, the new prototype held 170 g. How many more grams did it hold?
38. 38.True or false: to test it only once is poor testing. (a) False (b) True
39. 39.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 190 g. How many more grams did it hold?
40. 40.True or false: to measure the same way is good testing. (a) True (b) False

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