NATURAL SCIENCE UNIT 2.

WHAT OTHER GROUPS OF VERTEBRATES ARE THERE?
Fish,Birds and Amphibians are three important vertebrate groups.
WHAT ARE THE CHARACTERISTICS OF FISH?
RESPIRATION:Fish breathe with their gills.
The gills absorb the oxygen from the water and pass it into the blood.
EXTREMITIES:Fish have fins and tails.They use them to swim through the water and to change direction.
REPRODUCTION:Almost all fish are oviparous.
The females produce eggs and lay them in the water.
FISH BODIES:Fish have a long body that is covered with scales.
WHAT ARE THE CHARACTERISTICS OF BIRDS?
BIRD BODIES:BIrds have aerodynamic bodies. Their bones are thin and light,with lots of air spaces inside.Both of these characteristics make it easier for them to fly.
RESPIRATION:Birds have lungs to breathe air.
REPRODUCTION:Birds are oviparous.Like reptiles,amphibians and fish,birds lay eggs.
EXTREMITIES:Birds have four extremities: two legs and two wings.
WHAT ARE THE CHARACTERISTICS OF AMPHIBIANS?
AMPHIBIAN BODIES:Amphibians have thin,smooth skin.
EXTREMITIES:Amphibians have four legs.Many also have a tail.
REPRODUCTION:Amphibians are oviparous.
RESPIRATION:When amphibians are young,they have gills to breathe in water.When amphibians become adults,they grow lungs,breathe air and live on land.
VOCABULARY.-
REPRODUCTION:Reprodución
Nutrition:Nutrición
Amphibians:Anfibios
Respiration:Respiración
eggs:huevos
grow:crecer
Penguins:pinguinos
legs:piernas
oviparous:oviparos
sentences:frases
frogs:ranas
copy:copiar
kingdoms:reinos
fish:peces
birds:pajaros/aves es mejor que digais aves
poster:poster
write:escribe/escribir
reproduction:reprodución