6. Fish live in water and breather through gills. Their skin is
covered in scales and they have fins to swim.
7. 2.- AMPHIBIANS
Amphibians can live in water and on land. Their babies live in the
water and breathe through gills. The adults breathe through
lungs and through their skin.
Newt
Frog
8. 3.- REPTILES
A lot of reptiles live on land and some in water. They breath
through lungs. Their skin is covered in scales and some have a
shell.
Snake
Tortoise
shell
scales
9. 4.- BIRDS
Birds live on land and in the air. They breath through lungs. They
have feathers and wings.
eagle feathers
wings
hummingbird
10. 5.- MAMMALS
A lot live on land, some in water. They breathe through lungs. Their
body is covered in skin and fur. Their babies feed on their
mother’s milk.
bears
seals
fur
12. c) How they reproduce:
Most vertebrates are oviparous: their babies are born from eggs laid
by the mother (fish, amphibians, reptiles and birds)
turtles
birds
Some vertebrates, the mammals, are viviparous: their babies are born
alive from their mother’s womb
horses
Human beings
13. Invertebrates are animals that do not have a spinal
column or a skeleton made of bones. Some invertebrates
are: jellyfish, worms, molluscs and arthropods
jellyfish
jellyfish snail
worms
arthropods molluscs
earthworm
14. Most of the animals on The Earth are invertebrates, many of
them live in the sea and are very small
• They have a soft body because they do not have skeletons.
• Many have a shell or exoskeleton to protect their soft bodies
shell
Soft body
exoskeleton
15. a) What they eat:
They are carnivores, herbivores and omnivores.
b) How they breathe:
Some breathe through their skin, others through gills, and others
through lungs.
c) How they reproduce:
All invertebrates are oviparous. Their offspring are called larva.
When they grow, some of them change shape.
16. 1.- What is a vertebrate? What type of vertebrate is a dog?
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2.- What are the five groups of vertebrates?
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3.- In what way can we classify vertebrates?
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4.- What is an invertebrate?
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5.- How do many invertebrates protect their soft bodies?
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6.- How do invertebrates reproduce?
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7.- In what way can we classify invertebrates?
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18. Write two characteristics of the following
animals
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19. Answer these questions
This is an elephant, a mammal:
How does it breathe?
What does it eat?
How does it reproduce?