Remember: A robot senses, decides with a rule, then acts, again and again. A sensor measures the world, and a robot knows only what its sensors tell it.
Read and answer
Read the story, then answer.
The robot that bumpedBo the robot trundles through a dark room, following his steps perfectly, and bump! He walks straight into the table leg, because his steps did not say to turn. Mr. Reyes says a robot needs senses too, and they are called sensors. A light sensor measures how bright it is, a touch sensor is like a whisker, and a sound sensor is like an ear. A distance sensor sends out a tiny ping of sound, and the longer it takes to come back, the farther away the table is. A robot does three things over and over: it senses the world, it decides with a rule, and it acts. Bo's new rule says that if the table is close, he turns, or else he goes forward. At noon a big cloud drifts over, the room dims, and Bo's lamp turns on.
1
Bo bumped into the table. What does he need to notice it?
📡A sensor👣More steps🔊A louder voice
2
The table is close. What does Bo's rule make him do?
Go forwardBeepTurn
3
At which daylight does Bo's lamp first turn on?
☀️Sunny☁️Cloudy🌆Dusk
4
When the cloud made the room dim at noon, Bo was being silly.
TrueFalse
5
A robot knows only what its sensors tell it.
TrueFalse
6
A robot senses, with a rule, then acts.
decidessleepssings
Match, order and fix
7
Join each job to its part of the cycle.
1read a sensor
2check the rule
3turn a wheel
Adeciding
Bacting
Csensing
8
Join each sensor to what it measures.
1a light sensor
2a sound sensor
3a touch sensor
4a distance sensor
Ahow loud it is
Bhow bright it is
Chow far away something is
Da bump or a press
9
Bo avoids the table. Put the cycle in order.
Bo's rule says: if the table is close, turn
Bo's wheels turn him away
Bo's distance sensor pings and finds the table is close
10
Mina says: Bo bumped, so I will give him more steps. What is the mix-up to fix?
Steps are a kind of sensorSteps say what to do, but only a sensor shows what is thereBo needs a lamp
11
Bo's ping takes longer to come back than before. Is the table nearer or farther away?
NearerFarther away
12
Write one sensor you could find at home, and what it senses.
13
Draw Bo with a sensor, and show what it senses.
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Answer key · Set A
Bo learns to sense
1A sensor Steps say what to do, and sensors show what is there. Only a sensor can show Bo the table.
2Turn The rule says: if the table is close, turn, or else go forward.
3Dusk At dusk the sensor reads low light, so the rule says lamp on. It stays on in the dark and at night.
4False His sensor said dim, so his rule said lamp. A robot follows its rule using what its sensors tell it.
5True Without a sensor for something, a robot cannot know it.
6decides Sense, decide, act: it repeats that cycle many times every second.
71-C, 2-A, 3-B Reading a sensor is sensing, checking the rule is deciding, and turning a wheel is acting.
81-B, 2-A, 3-D, 4-C Each sensor measures one thing about the world.
92, 3, 1 First he senses, then he decides with the rule, and then he acts.
10Steps say what to do, but only a sensor shows what is there More steps would not help Bo see the table. A sensor would.
11Farther away The longer the ping takes to come back, the farther away the table is.
12Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.