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WorksheetsColour and Ultrasonic Sensors
Total questions: 13
Worksheet time: 7mins
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 does the Wait Block wait for before playing the "Hello" sound?
The Ultrasonic Sensor to detect an object less than 50 cm away
The Ultrasonic Sensor to detect an object more than 50 cm away
The robot to travel less than 50 cm
The Ultrasonic Sensor's reading to change by up to 50 cm
How do you select the sound file the robot plays?
By clicking in the upper-right "File Name" blank on the block
By speaking into the speakers of the EV3
By adding a File Block
Are you kidding? Robots don't speak!
What is the question mark on the wait block / Ultrasonic called?
Limit
Threshold
Parametre
Echolocation
What does this code do?
go forward until it "sees" something 30 cm away then stop
Reverse until it "sees" something 30 cm away then stop
Reverse 50 rotations
go forward 50 rotations
What will the robot need to detect with the Colour Sensor?
The speed of the robot
Distance from the vehicle in front of the robot
Width of the road
Colour of a traffic light
What does this programme do?
Wait for the Colour Sensor to see a Red object, then move forward
Wait for the Colour Sensor to see a Green object, then move forward
Wait until an object is moved out of the way, then move forward
Move forward waits until it sees a Green object, then stops
When multiple colours are checked in the "Set of Colours" area, what will the Wait Block do?
Wait for ANY of the colours to be seen
Wait for ALL of the colours to be seen at the same time
Wait for ALL of the colours to be seen at least once each
Wait for ALL of the colours to be seen in the order indicated by the numbers
EV3 Colour Sensor can detect ? different colours
7
6
8
6
What does the No Colour "colour" mean in the Set of Colours menu?
it doesn't know which colour it is
"No Colour" is the same as Black or White
It really means NO COLOUR is being detected
It doesn't see anything
Point the Colour Sensor directly at the Red side of the Colour Crate. What value do you see?
5
4
2
1
What value should you see if the Colour Sensor is pointed
at the Blue side of the Colour Crate?
3
4
5
2
The photodetector ...
reflects the light
takes in the light
prevent the ambient light
makes more light available
