PS : 4217 MOT : SCIENCE I
description
Transcript of PS : 4217 MOT : SCIENCE I
![Page 1: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/1.jpg)
PS : 4217 MOT : SCIENCE I
Presenter : Alice Lim Wen Pei 08B0916
Unit 3 Classification Of
Invertebrates
![Page 2: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/2.jpg)
Objectives By the end of the lesson, student should be able to :
Define what is invertebrate
State animals without backbone (molluscs, annelids and arthropods)
State the for types of arthropods (insects, arachnids, crustaceans and myriapods)
Give examples for each of the group
![Page 3: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/3.jpg)
What is invertebrate?Animals without backbones.There are many groups of
invertebrates.The three important groups of
invertebrates are :
Molluscs (animals with shells)Annelids (segmented worms)Arthropods (invertebrates with
jointed legs)
![Page 4: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/4.jpg)
Molluscs (animals with shells)
Have shellsHave soft bodies and a muscular foot
Have tentaclesExamples : Snail, Octopus and Mussel
Snail
![Page 5: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/5.jpg)
Octopus
Mussel
![Page 6: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/6.jpg)
Annelids (segmented worms)Body is divided into segments (parts)
There are bristles on the segmentsExamples : Earthworm, Leech and Ragworm
Earthworm
![Page 7: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/7.jpg)
Leech
Ragworm
![Page 8: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/8.jpg)
Arthropods (invertebrates with jointed legs)
Bodies have three parts :i. Headii. Thoraxiii.Abdomen
![Page 9: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/9.jpg)
Have a hard exo-skeleton (skeleton on the outside of the body)
Can be divided into 4 types :1. Insects – 3 pairs of legsExamples : Bee, Mosquito, Cockroach
Mosquito
Bee
![Page 10: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/10.jpg)
2. Arachnids – 4 pairs of legsExamples : Spiders and Scorpions
Spider
Scorpion
![Page 11: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/11.jpg)
3. Crustaceans – eight to ten legs Examples : Crabs, Prawns and Lobsters
Crab Prawn
![Page 12: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/12.jpg)
4. Myriapods – many legs Examples : Centipedes and Millipedes
Centipede Millipede
![Page 13: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/13.jpg)
Exercise
![Page 14: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/14.jpg)
SUMMARY :What is invertebrate ? - Animals without backbone.
What are the three main group of invertebrates? - Molluscs, Annelids and Arthropods.
Example for :Molluscs – SnailAnnelids – EarthwormArthropods – Grasshopper
![Page 15: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/15.jpg)
Arthropds can be classify into 4 types. What are they?
- Insects - Arachnids - Crustaceans - Myriapods
![Page 16: PS : 4217 MOT : SCIENCE I](https://reader035.fdocuments.us/reader035/viewer/2022081802/56816718550346895ddb8bb7/html5/thumbnails/16.jpg)
Thank you for listening