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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 468 · 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.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) close its eyes (c) speed up (d) stop or turn away
  2. 2.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 80. What does the robot do?     (a) stop (b) turn left (c) go forward
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 80. What does the robot do?     (a) turn left (b) stop (c) go forward
  4. 4.🤖 What does an “if” let a robot do? (a) charge itself (b) go faster always (c) skip all sensors (d) choose using a sensor
  5. 5.🤖 A robot is 35 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  6. 6.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  7. 7.🤖 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) go forward (b) turn left (c) stop
  8. 8.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward
  9. 9.🤖 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
  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 75 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 < 25) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  13. 13.🤖 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
  14. 14.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) turn right (b) go forward
  15. 15.🤖 A robot is 33 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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 20. What does the robot do?     (a) turn left (b) stop (c) go forward
  17. 17.🤖 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)?
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 6 cm and the light reading is 30. What does the robot do?     (a) go forward (b) stop (c) turn left
  19. 19.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) turn right (b) go forward
  20. 20.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) go forward (b) turn right
  21. 21.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) turn right (b) go forward
  22. 22.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) go forward (b) turn right
  23. 23.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the else part (c) the if part (d) neither part
  25. 25.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 29 cm and the light reading is 25. What does the robot do?     (a) stop (b) go forward (c) turn left
  26. 26.🤖 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)?
  27. 27.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) turn right (b) go forward
  28. 28.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 6 cm. What does the robot do?     (a) turn right (b) go forward
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 8 cm and the light reading is 30. What does the robot do?     (a) stop (b) go forward (c) turn left
  30. 30.🤖 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
  31. 31.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 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
  33. 33.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) turn right (b) go forward
  34. 34.🤖 A robot is 50 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  35. 35.🤖 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
  36. 36.🤖 A robot is 92 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  37. 37.🤖 A robot is 84 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  38. 38.🤖 A robot is 87 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 57 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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