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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 173 · 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.🤖 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
  2. 2.🤖 A robot is 100 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.🤖 A robot is 56 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  4. 4.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 35 cm. What does the robot do?     (a) turn right (b) go forward
  5. 5.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) the else part (c) both parts (d) the if part
  6. 6.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 35. What does the robot do?     (a) go forward (b) stop (c) turn left
  7. 7.🤖 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
  8. 8.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 65. What does the robot do?     (a) stop (b) turn left (c) go forward
  9. 9.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) turn right (b) go forward
  10. 10.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) turn right (b) go forward
  11. 11.🤖 A robot is 63 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 85. What does the robot do?     (a) turn left (b) stop (c) go forward
  13. 13.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) go forward (b) back up and turn left
  14. 14.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 1 cm. What does the robot do?     (a) go forward (b) turn right
  15. 15.🤖 A robot is 66 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  16. 16.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) turn right (b) go forward
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 90. What does the robot do?     (a) stop (b) go forward (c) turn left
  18. 18.🤖 What does an “if” let a robot do? (a) charge itself (b) choose using a sensor (c) go faster always (d) skip all sensors
  19. 19.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is pressed. What does the robot do?     (a) go forward (b) back up and turn right
  20. 20.🤖 A robot is 49 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 55. What does the robot do?     (a) stop (b) go forward (c) turn left
  22. 22.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  23. 23.🤖 A robot is 53 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  24. 24.🤖 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
  25. 25.🤖 Obstacle avoiding: what should a robot do when something is close? (a) stop or turn away (b) speed up (c) close its eyes (d) push it hard
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 35. What does the robot do?     (a) go forward (b) turn left (c) stop
  27. 27.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward
  28. 28.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  29. 29.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 55. What does the robot do?     (a) go forward (b) stop (c) turn left
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 20. What does the robot do?     (a) stop (b) turn left (c) go forward
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 15. What does the robot do?     (a) turn left (b) go forward (c) stop
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 34 cm and the light reading is 85. What does the robot do?     (a) stop (b) go forward (c) turn left
  34. 34.🤖 A robot is 36 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 < 25) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) turn right (b) go forward
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 60. What does the robot do?     (a) stop (b) go forward (c) turn left
  37. 37.🤖 A robot is 96 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 80. What does the robot do?     (a) turn left (b) go forward (c) stop
  39. 39.🤖 A robot is 92 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 35 cm and the light reading is 55. What does the robot do?     (a) stop (b) go forward (c) turn left

Answer key

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

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