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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 548 · 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 (distance < 10) { turn right } else { go forward }
    The distance sensor reads 5 cm. What does the robot do?     (a) go forward (b) turn right
  2. 2.🤖 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
  3. 3.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) turn right (b) go forward
  4. 4.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 20. What does the robot do?     (a) turn left (b) go forward (c) stop
  5. 5.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 70. What does the robot do?     (a) turn left (b) stop (c) go forward
  6. 6.🤖 A robot is 90 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  7. 7.🤖 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
  8. 8.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  9. 9.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) go faster always (c) charge itself (d) skip all sensors
  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) go forward (b) back up and turn right
  11. 11.🤖 A robot is 59 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 < 20) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 45. What does the robot do?     (a) stop (b) turn left (c) go forward
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 75. What does the robot do?     (a) stop (b) go forward (c) turn left
  15. 15.🤖 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
  16. 16.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) both parts (c) the if part (d) the else part
  17. 17.🤖 A robot is 106 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 90. What does the robot do?     (a) stop (b) turn left (c) go forward
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 30. What does the robot do?     (a) stop (b) turn left (c) go forward
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 70. What does the robot do?     (a) turn left (b) go forward (c) stop
  21. 21.🤖 Obstacle avoiding: what should a robot do when something is close? (a) speed up (b) close its eyes (c) push it hard (d) stop or turn away
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 25. What does the robot do?     (a) stop (b) go forward (c) turn left
  23. 23.🤖 A robot is 98 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.🤖 A robot is 66 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  25. 25.🤖 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)?
  26. 26.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  27. 27.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 25. What does the robot do?     (a) go forward (b) stop (c) turn left
  28. 28.🤖 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) go forward (c) stop
  29. 29.🤖 A robot is 43 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 31 cm and the light reading is 30. What does the robot do?     (a) stop (b) go forward (c) turn left
  31. 31.🤖 A robot is 70 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  32. 32.🤖 A robot is 30 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  33. 33.🤖 A robot is 68 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  34. 34.🤖 A robot is 81 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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 10. What does the robot do?     (a) turn left (b) go forward (c) stop
  36. 36.🤖 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
  37. 37.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 A robot is 78 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  39. 39.🤖 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)?
  40. 40.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 41 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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