The document summarizes different groups of invertebrates including arthropods, molluscs, and the life cycle of a butterfly. Arthropods include insects, arachnids, myriapods, and crustaceans, which have features like an exoskeleton and antennae. Molluscs include gastropods, bivalves, and cephalopods, which are soft-bodied and some have shells. The life cycle of a butterfly is described as eggs laid on a leaf, then the larvae/caterpillar stage where they eat a lot, forming a chrysalis or pupa, and emerging as a winged adult butterfly.

1. UNIT 6 INVERTEBRATES SCIENCE
OTHER INVERTEBRATE GROUPS (Otros grupos de invertebrados)
Cnidarians, annelids or echinoderms (cnidarios, anélidos o equinodermos).
Science 3º - Educación Primaria
Contenido mínimo para estudiar:
 Invertebrates can be divided into groups. They don’t have a backbone.
ARTHROPODS (ARTRÓPODOS)
INSECTS
(insectos)
ARACHNIDS
(arácnidos)
MYRIAPODS
(miriápodos)
CRUSTACEANS
(crustáceos)
Exoskeleton (exoesqueleto).
2 antennae (antenas).
6 legs.
Most have wings.
Their bodies have 3
sections: head, thorax
and abdomen. (Suscuerpos
tienen 3 secciones:cabeza, tórax y
abdomen).
 Exoskeleton.
 8 eyes.
 8 legs.
 Their bodies have
2 sections: head
and abdomen.
 Exoskeleton.
 2 antennae.
 Lots of legs
(Muchas patas).
 Their bodies
have lots of
sections.
 Exoskeleton.
 4 antennae.
 2 eyes.
 Most have 8 legs
and 2 claws
(garras).
MOLLUSCS (MOLUSCOS)
GASTROPODS
(gasterópodos)
BIVALVES
(bivalvos)
CEPHALOPODS
(cefalópodos)
Soft body (cuerpo blando).
2 eyes on the end of antennae (dos
ojos al final de las
antenas).
Some have a
shell (caparazón o concha).
They live on land (tierra)and in
water.
Soft body.
2 shells connected
at one point (dos
conchas conectadas en un
punto).
They
live in
water.
 Soft body.
 Head with tentacles.
 They live in water.
 Most don’t have a shell.
THE LIFE CYCLE OF A BUTTERFLY
1. Eggs: An adult butterfly lays eggs on a leaf (hoja).
2. Larvae or caterpillars (larvas u orugas): they eat a lot.
3. Chrysalis or pupa (crisálida):
The butterfly forms inside (dentro) the pupa.
4. Butterfly: It has wings and 6 legs.