EV3 Session 4

Why does a single ultrasonic sensor have 2 "eyes" on it?

• So the ultrasonic waves can hit more objects

• So the bot can see differences in color

• One eye sends a signal and one receives it

• In case one eye stops working the other eye is a backup

Ultrasonic waves are a form of _______ waves

• sound

• ocean

• radio

• seismic

What is the maximum distance our ultrasonic sensor can detect?

• 100

• 15

• 1023

• 255

An ultrasonic sensor is a device that can measure the ________ to an object by sending out _________ waves.

• density / echo

• path / seismic

• elevation / sonic

• distance / sound

The speed of sound is _________ m/s

• 100

• 340

• 250

• 255

Why might the Ultrasonic sensors be preferred over Touch Sensors for detecting walls and obstacles?

• Hitting wall could damage the wall

• Hitting a wall could damage the robot

• It is quicker to detect obstacles at a distance

• All of them

What is the name of this part?

• EV3 Brick

• Medium Motor

• Large Motor

• Sensor

What is the name of this part?

• EV3 Brick

• Brain

• Motor

• Sensor

What is the name of this part?

• EV3 Brick

• Medium Motor

• Large Motor

• Touch Sensor

What is the name of this part?

• Rechargeable Battery

• Ultrasonic Sensor

• Touch Sensor

• Gyro Sensor