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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 731 · 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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 36 cm and the light reading is 50. What does the robot do?     (a) turn left (b) stop (c) go forward
  2. 2.🤖 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
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 35 cm and the light reading is 80. What does the robot do?     (a) turn left (b) stop (c) go forward
  4. 4.🤖 A robot is 60 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  5. 5.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 35. What does the robot do?     (a) turn left (b) stop (c) go forward
  6. 6.🤖 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)?
  7. 7.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) the if part (c) both parts (d) the else part
  8. 8.🤖 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
  9. 9.🤖 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
  10. 10.🤖 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
  11. 11.🤖 A robot is 52 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  12. 12.🤖 Obstacle avoiding: what should a robot do when something is close? (a) speed up (b) push it hard (c) stop or turn away (d) close its eyes
  13. 13.🤖 A robot is 67 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  14. 14.🤖 A robot is 90 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  15. 15.🤖 A robot is 92 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 < 10) { turn right } else { go forward }
    The distance sensor reads 8 cm. What does the robot do?     (a) turn right (b) go forward
  17. 17.🤖 A robot is 55 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 7 cm and the light reading is 40. What does the robot do?     (a) stop (b) turn left (c) go forward
  19. 19.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) charge itself (c) go faster always (d) skip all sensors
  20. 20.🤖 A robot is 30 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 10 cm and the light reading is 90. 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 98 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 9 cm. What does the robot do?     (a) turn right (b) go forward
  25. 25.🤖 A robot is 31 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  26. 26.🤖 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
  27. 27.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  28. 28.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) go forward (b) turn right
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 25 cm and the light reading is 80. What does the robot do?     (a) stop (b) turn left (c) go 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 35. What does the robot do?     (a) turn left (b) stop (c) go forward
  31. 31.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 35 cm. What does the robot do?     (a) go forward (b) turn right
  33. 33.🤖 A robot is 73 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  35. 35.🤖 A robot is 57 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 35. What does the robot do?     (a) turn left (b) go forward (c) stop
  37. 37.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 37 cm. What does the robot do?     (a) go forward (b) turn right
  39. 39.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  40. 40.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right

Answer key

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

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