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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 177 · 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.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the if part (c) the else part (d) neither part
  2. 2.🤖 A robot is 34 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  3. 3.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) go faster always (d) choose using a sensor
  4. 4.🤖 A robot is 48 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  5. 5.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) go forward (b) back up and turn left
  6. 6.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) turn right (b) go forward
  7. 7.🤖 A robot is 94 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  8. 8.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  9. 9.🤖 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
  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.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) stop or turn away (c) close its eyes (d) speed up
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 35. What does the robot do?     (a) go forward (b) turn left (c) stop
  13. 13.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 33 cm. What does the robot do?     (a) go forward (b) turn right
  14. 14.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  15. 15.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  16. 16.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 25. What does the robot do?     (a) stop (b) go forward (c) turn left
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 45. What does the robot do?     (a) stop (b) turn left (c) go forward
  18. 18.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) go forward (b) turn right
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 65. What does the robot do?     (a) turn left (b) go forward (c) stop
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 35 cm and the light reading is 20. What does the robot do?     (a) turn left (b) stop (c) go forward
  21. 21.🤖 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) go forward (b) turn left (c) stop
  22. 22.🤖 A robot is 84 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  23. 23.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 8 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  24. 24.🤖 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
  25. 25.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  26. 26.🤖 A robot is 37 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  27. 27.🤖 A robot is 43 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 80. What does the robot do?     (a) go forward (b) stop (c) turn left
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 35. What does the robot do?     (a) go forward (b) stop (c) turn left
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 80. What does the robot do?     (a) turn left (b) stop (c) go forward
  31. 31.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 34 cm and the light reading is 90. What does the robot do?     (a) turn left (b) go forward (c) stop
  33. 33.🤖 A robot is 42 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  34. 34.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) turn right (b) go forward
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 50. What does the robot do?     (a) stop (b) turn left (c) go forward
  36. 36.🤖 A robot is 68 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  37. 37.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 A robot is 36 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 22 cm and the light reading is 25. What does the robot do?     (a) turn left (b) stop (c) go forward
  40. 40.🤖 A robot is 99 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. the else part
  2. 14
  3. choose using a sensor
  4. 3
  5. go forward
  6. go forward
  7. 8
  8. turn right
  9. back up and turn left
  10. go forward
  11. stop or turn away
  12. stop
  13. go forward
  14. go forward
  15. turn right
  16. turn left
  17. go forward
  18. go forward
  19. stop
  20. turn left
  21. turn left
  22. 14
  23. stop
  24. back up and turn right
  25. 9
  26. 2
  27. 3
  28. go forward
  29. go forward
  30. go forward
  31. turn right
  32. go forward
  33. 3
  34. turn right
  35. go forward
  36. 5
  37. go forward
  38. 2
  39. turn left
  40. 19

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