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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 769 · 40 questions
TalentJR

Robot tip (True → if, false → else): Put the reading into the condition: true → the if part, false → the else part. < means strictly less; an equal reading makes it false. else if: check the conditions from the top; the first true one wins. while: repeat until the condition is false.

NameDateTime takenScore ___ / 40
  1. 1.🤖 A robot is 47 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  2. 2.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is pressed. What does the robot do?     (a) back up and turn right (b) go forward
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 10. What does the robot do?     (a) turn left (b) stop (c) go forward
  4. 4.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  5. 5.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) neither part (c) both parts (d) the else part
  6. 6.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) back up and turn left (b) go forward
  7. 7.🤖 A robot is 85 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  8. 8.🤖 A robot is 93 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  9. 9.🤖 A robot is 52 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  10. 10.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) back up and turn right (b) go forward
  11. 11.🤖 A robot is 76 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  12. 12.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 5 cm. What does the robot do?     (a) go forward (b) turn right
  13. 13.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) go faster always (c) charge itself (d) skip all sensors
  14. 14.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 20 cm and the light reading is 15. What does the robot do?     (a) stop (b) turn left (c) go forward
  16. 16.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  17. 17.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) back up and turn left (b) go forward
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 45. What does the robot do?     (a) turn left (b) stop (c) go forward
  19. 19.🤖 A robot is 72 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  20. 20.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  21. 21.🤖 A robot is 89 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 80. What does the robot do?     (a) go forward (b) turn left (c) stop
  23. 23.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 15. What does the robot do?     (a) go forward (b) stop (c) turn left
  24. 24.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 55. What does the robot do?     (a) go forward (b) turn left (c) stop
  25. 25.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) turn right (b) go forward
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 25. What does the robot do?     (a) stop (b) go forward (c) turn left
  27. 27.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 8 cm. What does the robot do?     (a) turn right (b) go forward
  28. 28.🤖 A robot is 45 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  29. 29.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  30. 30.🤖 A robot is 46 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 75. What does the robot do?     (a) stop (b) go forward (c) turn left
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 45. What does the robot do?     (a) stop (b) go forward (c) turn left
  33. 33.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) go forward (b) turn right
  34. 34.🤖 A robot is 102 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  35. 35.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) turn right (b) go forward
  36. 36.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) speed up (d) stop or turn away
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 20. What does the robot do?     (a) turn left (b) stop (c) go forward
  38. 38.🤖 A robot is 94 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 45. What does the robot do?     (a) stop (b) turn left (c) go forward
  40. 40.🤖 A robot is 86 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?

Answer key

  1. 3
  2. back up and turn right
  3. turn left
  4. turn right
  5. the else part
  6. back up and turn left
  7. 15
  8. 13
  9. 12
  10. go forward
  11. 6
  12. turn right
  13. choose using a sensor
  14. go forward
  15. turn left
  16. turn right
  17. go forward
  18. go forward
  19. 6
  20. turn right
  21. 7
  22. go forward
  23. turn left
  24. stop
  25. turn right
  26. stop
  27. turn right
  28. 15
  29. go forward
  30. 3
  31. go forward
  32. go forward
  33. turn right
  34. 12
  35. go forward
  36. stop or turn away
  37. stop
  38. 8
  39. go forward
  40. 16

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