Invertebrates animals

Invertebrates

1. 3rd OF PRIMARY NATURAL SCIENCE UNIT 1 – Part 2

2. INVERTEBRATES ANIMALS They don’t have skeleton They are oviparous There are 6 groups ARTHROPODS MOLLUSCS SPONGES JELLYFISH WORMS ECHINODERMS

3. INVERTEBRATES ANIMALS

4. ARTHROPODS They can be divided in 3 groups INSECTS: they have 6 legs ARACHNIDS: they have 8 legs CRUSTACEAN : they have 10 legs

5. ARTHROPODS INSECTS ARACHNIDS CRUSTACEAN Bee Butterfly Grasshopper Ant Spider Scorpion Crab

6. MOLLUSCS They have muscled body and they can have or not SHELL SNAIL SQUID MUSSEL

7. SPONGES They have PORES in the body They live in the water

8. JELLYFISH They have TENTACLES

9. WORMS They have the body divided in RINGS EARTH WORM CATERPILLAR NEREIS

10. ECHINODERMS They have SPIKES SEAURCHIN STARFISH

11. QUESTIONS How many groups of invertebrates animals are there ? In which group is the starfish ? Which group has pores in the body ? What’s the name of the arthropods with 8 legs ? In which group is the butterfly ? Which group has tentacles ? In which group of invertebrates is a crab ?

12. ACTIVITIES 1. Say in which group of invertebrates are these animals : EXAMPLE: Spider – it is in the group of arthropods STARFISH – SNAIL – BEE – BUTTERFLY – CATERPILLAR – SEAURCHIN - SCORPION

13. JOURNAL Describe these two animals :