Engineering Worksheet: Prototypes and Fair Tests

Engineering lesson 5: Prototypes and fair tests · Set 350 · 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 240 g, 190 g and 170 g. What is the mean (average) load it held, in grams?
2. 2.🔢 To build and test a straw bridge, what comes right after “load it with coins”? (a) read the challenge rules (b) strengthen the weak part (c) sketch three ideas (d) choose and draw one
3. 3.🧪 A paper bridge was tested three times. It held 220 g, 180 g and 170 g. What is the mean (average) load it held, in grams?
4. 4.🧪 Three prototype bridges were tested with the same method. Design A held 350 g, design B held 400 g and design C held 300 g. Which design was the strongest? (a) design B (b) design A (c) design C
5. 5.🧪 A paper bridge was tested three times. It held 290 g, 110 g and 230 g. What is the mean (average) load it held, in grams?
6. 6.🔍 Which is the odd one out? (a) test it only once (b) change lots at once (c) repeat each test (d) guess, do not measure
7. 7.🧪 Three prototype bridges were tested with the same method. Design A held 280 g, design B held 380 g and design C held 330 g. Which design was the weakest? (a) design B (b) design C (c) design A
8. 8.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
9. 9.🔢 To build and test a straw bridge, which is the FIRST step? (a) load it with coins (b) strengthen the weak part (c) sketch three ideas (d) read the challenge rules
10. 10.🧪 In a fair test, how many things do you change at a time? (a) none (b) one (c) two (d) all of them
11. 11.🔍 Which is the odd one out? (a) repeat each test (b) measure the same way (c) test it only once (d) change only one thing
12. 12.🧪 A paper bridge was tested three times. It held 320 g, 280 g and 330 g. What is the mean (average) load it held, in grams?
13. 13.🧪 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
14. 14.🔍 Which is the odd one out? (a) use a new load each time (b) change lots at once (c) guess, do not measure (d) measure the same way
15. 15.True or false: to use the same load is poor testing. (a) False (b) True
16. 16.🧪 The first prototype held 100 g. After the team improved it, the new prototype held 160 g. How many more grams did it hold?
17. 17.🧪 Is it good or poor testing to change lots at once? (a) poor testing (b) good testing
18. 18.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 450 g. How many more grams did it hold?
19. 19.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
20. 20.🧪 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 C (b) design B (c) design A
21. 21.🧪 Is it good or poor testing to measure the same way? (a) poor testing (b) good testing
22. 22.🧪 A paper bridge was tested three times. It held 190 g, 170 g and 180 g. What is the mean (average) load it held, in grams?
23. 23.True or false: to hide a failed test is poor testing. (a) True (b) False
24. 24.🔢 To build and test a straw bridge, what comes right after “read the challenge rules”? (a) choose and draw one (b) load it with coins (c) sketch three ideas (d) strengthen the weak part
25. 25.🔢 To build and test a straw bridge, which comes first: “load it with coins” or “read the challenge rules”? (a) read the challenge rules (b) load it with coins
26. 26.🧪 A paper bridge was tested three times. It held 320 g, 240 g and 370 g. What is the mean (average) load it held, in grams?
27. 27.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “sketch three ideas”? (a) sketch three ideas (b) strengthen the weak part
28. 28.🔍 Which is the odd one out? (a) use the same load (b) change lots at once (c) repeat each test (d) record every result
29. 29.🧪 What is a prototype? (a) a sales poster (b) an early test model (c) a broken part (d) the final product
30. 30.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 290 g. How many more grams did it hold?
31. 31.🧪 Three prototype bridges were tested with the same method. Design A held 170 g, design B held 220 g and design C held 270 g. Which design was the strongest? (a) design A (b) design C (c) design B
32. 32.🧪 Is it good or poor testing to skip writing results? (a) good testing (b) poor testing
33. 33.🔢 To build and test a straw bridge, what comes right after “sketch three ideas”? (a) choose and draw one (b) build it with straws (c) load it with coins (d) read the challenge rules
34. 34.True or false: to hide a failed test is good testing. (a) True (b) False
35. 35.🧪 The first prototype held 300 g. After the team improved it, the new prototype held 390 g. How many more grams did it hold?
36. 36.🧪 Is it good or poor testing to repeat each test? (a) good testing (b) poor testing
37. 37.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to test ideas cheaply (c) to decorate a room (d) to sell them at once
38. 38.True or false: to test it only once is good testing. (a) True (b) False
39. 39.🧪 The first prototype held 80 g. After the team improved it, the new prototype held 160 g. How many more grams did it hold?
40. 40.True or false: to record every result is poor testing. (a) True (b) False

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