Year 6 Lesson 4
ClassiďŹ cation
Warm-Up Can you identify similarities and differences between these living things?
How could they be classiďŹ ed into groups?
Warm-Up Can you put them into groups? Lay eggs
Can y
Herbivore
Can breathe underwater
Live on land
Vertebrate
Warm-Up Linnaean Taxonomy Domain Kingdom This is Carl Linnaeus. He created a classiďŹ cation system for all plants and animals. Do you recognise any of these group names?
Phylum Class Order Family Genus Species
Warm-Up Classifying Humans
This is how humans are classiďŹ ed using Linnaean taxonomy!
Domain
Eukaryota
Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Primates
Family
Hominidae
Genus
Homo
Species
Sapiens
Mini-lesson ClassiďŹ cation Arachnid Mammal Fish
Insect
Annelid
Amphibian
Invertebrate
Vertebrate Reptile
Bird
Mollusc Echinoderm
Can you think of a living thing in each group?
Crustacean
Mini-lesson How would you classify these living things? Star ďŹ sh
Worm
Use the group names from the previous slide.
Tarantula
Brown Bear
Mini-lesson Arachnida What are common characteristics of arachnids?
Tarantula
Harvestman Can you think of any other animals which belong to the Arachnida class?
Fattail scorpion
Mini-lesson Characteristics of Arachnids Eight legs
Segmented body: 1. Abdomen 2. Fused head and thorax
Joint-legged
No wings or antennae Unable to chew
Hard exoskeleton
Mini-lesson Spider Behaviour Scuttles into dark corners to hide.
Hydraulic pressure in their legs allows for quick movement.
Build webs to catch prey.
Eight eyes — complex vision.
Transforms liquid silk into threads which are dispersed through organs on its abdomen.
Why do you think spiders behave in this way?
Keywords Complete the keyword activity in your Student Handout: Arachnid
ClassiďŹ cation
Species Taxonomist Invertebrate
Vertebrate
Let’s Discuss 1. Which classification group do spiders belong to? a. Arachnid b. Crustacean c. Annelid
Let’s Discuss 1. Which classiďŹ cation group do spiders belong to? a. Arachnid
2. With a partner, discuss how classifying living things makes it easier to identify them.
Let’s Build! Create and compare two systems where movement is controlled by pressure System 1
Pressure Sensor
Filter What default values does the Filter allow through?
DC Motor
Let’s Build! Create and compare two systems where movement is controlled by pressure System 2
Do the two systems work differently?
First remove the Filter.
Threshold: ‘True’ ‘30’
Challenge 1 Create a system to simulate the deďŹ ning movement of a spider
8 pipe cleaner legs - attach to Wheel DC Motor
Test your system!
What is the Pressure Sensor simulating?
Checks for Understanding 1. When does the Threshold block allow the system to be activated? a. When the Pressure Sensor reads a value of ‘30’ or above. b. When the Pressure Sensor reads a value of ‘30’ or below. c. Only when the Pressure Sensor reads a value of ‘30’.
2. Which of the following does not belong in the Arachnida class? a. Scorpion b. Huntsman c. Centipede
Checks for Understanding 1. When does the Threshold block allow the system to be activated? a. When the Pressure Sensor reads a value of ‘30’ or above.
2. Which of the following does not belong in the Arachnida class? c. Centipede
Debug It!
How can we simulate a faster reaction time of the ‘spider’?
How can we simulate a faster reaction time of the spider? 1
Threshold: ‘True’ ‘15’
Debug It!
How can we simulate a faster reaction time of the spider?
Debug It!
2
Threshold: ‘True’ ‘75’
Which Threshold setting simulated a faster reaction?
Challenge 2 Create a modification to the system to simulate the spider’s eyesight and reactions 1
Filter: ‘20–49’
Switch Direction
Interval
Light Sensor
Threshold: ‘True’ ‘50’
Challenge 2 Create a modiďŹ cation to the system to simulate the spider’s eyesight and reactions 2 Test your system!
Secure Light Sensor on top of the Wheel
Challenge 2 Create a modification to the system to simulate the spider’s eyesight and reactions Which input simulates: ● the ‘spider’ pouncing for its prey? ● the ‘spider’s changing direction as it looks around?
Record in your Student Handout.
Checks for Understanding 1. What is the purpose of the Switch Direction block? a. It changes the direction of the DC Motor. b. It causes the DC Motor to turn on and off every second. c. It allows the DC Motor to move continuously in the same direction.
2. Which characteristics of the spider were simulated by the system? a. Complex eyesight & catching prey in web b. Wings & Antennae c. Complex hearing & hard exoskeleton
Checks for Understanding 1. What is the purpose of the Switch Direction block? a. It changes the direction of the DC Motor.
2. Which characteristics of the spider were simulated by the system? a. Complex eyesight & catching prey in web
Chilli Challenges
Experiment with the settings of the Threshold and Filter blocks. Can you evaluate what happens when they are set to the same, similar or very different values?
Experiment with sound. Can you add a Sound Player to simulate the sound of a spider walking over leaves when it starts moving? Hint: ‘Rain’ from the ‘Weather’ category works well.
Experiment with the Light Sensor. Can you evaluate the difference in the system when the Light Sensor is set to ‘As a Button (False / True)’ compared to ‘As a sensor (0-100).
Exit Ticket What have you learned today?
Can you annotate your system?
Now let’s apply what you know!
Exit Ticket
How are humans different from animals?
In which other contexts is classiďŹ cation important?