EARTH

It has three layers Crust: It is thin layer , it is brittle It is between 80 to 100 km thickness Mantle: It is thick layer It contains molten magma Core: It has outer and inner core The temperature is more than molten rocks . But it is in solid state due to high pressure.

Sea bed

Oceans and seasOceans are large basin of salt water Sea is a small basin of salt water

ClassificationKingdoms Monera Protista Fungia Plantia Animalia

Phylum porifera

Phylum cnidaria *cup shaped organsims. * Cnidiblasts in tentacles * Planula larva Class:Anthozoa :Coral polyp, Sea anemone Class : Hydrozoa: Portugeese man of war Class: Scyphozoa: Jelly fish

Coral polyp

Sea anemone

Jelly fish

Portugeese man of war

Phylum platihelminthes Flat ribbon like body Many are parasites Cause shistosomiasis Tape worms

Phylum Arthropoda Jointed limbs Compound eyes Carapace present. Shows moulting Class Crustacia: Crab,Lobster Goosebarnacles Class Insecta: insecta Class Arachinida: spider