Matching sensors to the data they capture
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. A greenhouse system must measure the amount of water vapour in the air. Which sensor captures this data?
2. A garden system must check how wet the soil is before watering the plants. Which sensor captures this data?
3. An intruder alarm must detect the body heat of a person entering a room. Which sensor captures this data?
4. A car reversing system must warn the driver how close the bumper is to a wall. Which sensor captures this data?
5. A smart alarm must detect the sound of breaking glass. Which sensor captures this data?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1moisture sensor | Ainfra-red sensor | |
| 2humidity sensor | BMeasures the amount of water vapour in the air | |
| 3Data captured: heat given off by a moving person, as used in a burglar alarm | CSound is captured by an acoustic sensor. A pressure sensor measures force on a surface or the pressure of a gas or liquid. | |
| 4Data captured: how close an object is, as used in a car parking aid | Dproximity sensor | |
| 5Soil dryness in a greenhouse -> humidity sensor | EMeasures the amount of water in soil or another solid material | |
| 6Loudness of a crowd -> pressure sensor | FHumidity measures water vapour in the air. Soil water content is moisture, so it needs a moisture sensor. |
C
Definitions
data first, then sensor
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
data ← "water content of soil"
sensor ← "________ sensor"
2.
data ← "water vapour in the air"
sensor ← "________ sensor"
3.
data ← "heat given off by a person"
sensor ← "_________ sensor"
4.
data ← "force pressing down on a bed mat"
sensor ← "________ sensor"
5.
data ← "sound level in a classroom"
sensor ← "________ sensor"
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
sensor = "humidity"
B
data = "water in the soil"
C
print(sensor, "measures", data)
Question 2
A
data = "brightness of a room"
B
sensor = "proximity"
C
print("Use a", sensor, "sensor")
Question 3
A
data = "loudness of a classroom"
B
print("Data:", data)
C
sensor = "pressure"
Question 4
A
data = "water moving in a pipe"
B
sensor = "level"
C
print(data, "->", sensor)
Question 5
A
m = {}
B
m["air vapour"] = "humidity"
C
m["soil water"] = "moisture"
D
m["acidity"] = "gas"
Answer Key
Matching sensors to the data they capture
Section A: Quick Questions
Q1
A — Humidity sensor
Q2
A — Moisture sensor
Q3
B — Infra-red sensor
Q4
A — Proximity sensor
Q5
B — Acoustic sensor
Section B: Match the Pairs
Q1
moisture sensor → Measures the amount of water in soil or another solid material
Q2
humidity sensor → Measures the amount of water vapour in the air
Q3
Data captured: heat given off by a moving person, as used in a burglar alarm → infra-red sensor
Q4
Data captured: how close an object is, as used in a car parking aid → proximity sensor
Q5
Soil dryness in a greenhouse -> humidity sensor → Humidity measures water vapour in the air. Soil water content is moisture, so it needs a moisture sensor.
Q6
Loudness of a crowd -> pressure sensor → Sound is captured by an acoustic sensor. A pressure sensor measures force on a surface or the pressure of a gas or liquid.
Section C: Definitions
Q1
data first, then sensor — Each sensor captures one type of data, so identify the data first (e.g. moisture in soil, humidity in air), then name the sensor that measures it.Section D: Fill in the Blanks
Q1
data ← "water content of soil"
sensor ← "moisture sensor"Q2
data ← "water vapour in the air"
sensor ← "humidity sensor"Q3
data ← "heat given off by a person"
sensor ← "infra-red sensor"Q4
data ← "force pressing down on a bed mat"
sensor ← "pressure sensor"Q5
data ← "sound level in a classroom"
sensor ← "acoustic sensor"Section E: Spot the Error
Q1
A — Water in soil is measured by a moisture sensor. A humidity sensor measures water vapour in the air. Line 1 should be sensor = "moisture".
Q2
B — Brightness is measured by a light sensor. A proximity sensor detects how close an object is. Line 2 should be sensor = "light".
Q3
C — Sound level is captured by an acoustic sensor. A pressure sensor measures force on a surface, not sound. Line 3 should be sensor = "acoustic".
Q4
B — Water moving along a pipe is measured by a flow sensor. A level sensor measures how full a container is. Line 2 should be sensor = "flow".
Q5
D — Acidity is the data captured by a pH sensor. A gas sensor detects gases in the air. Line 4 should be m["acidity"] = "pH".