unit 5. natural science: reptiles, amphibians and fish

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Fish, reptiles And amphibians

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Fish, reptilesAnd amphibians

Fish were the first vertebrates to live on our planet.over time, they developed into amphibians.

Amphibians were the first vertebrates to leave the water and Move onto land.

They adapted well to life on land and developedinto reptiles. Dinosaurs were reptiles. They were thedominant animals on the planet for millions of years

REPRODUCTION: - Most reptiles are oviparous. They lay their eggs on land.- Baby reptiles look like adult reptiles when they hatch.

Reptiles

NUTRITION:- Most reptiles are carnivores.- Some are omnivores and eat plants, insects and small animals

Reptiles are vertebrate animals. Turtles, tortoises, lizards, snakes, crocodiles and alligators are reptiles. Reptiles spend most of their time on land, but some spend part of their time in water. Reptiles live in all types of habitats except in extremely cold climates.

reptiles

RESPIRATION:They breathe with their lungs.

PHYSICAL CHARACTERISTICS:Most have four limbs, but some have no limbs.They have scales that cover and protect their body.

Reptiles are vertebrate animals. Turtles, tortoises, lizards, snakes, crocodiles and alligators are reptiles. Reptiles spend most of their time on land, nbut some spend part of their time in water. Reptiles live in all types of habbitats except in extremely cold climates.

Lots of reptiles walk and run.

Some slither.

Some reptiles swim.

REPTILESCharacteristics How

are they born?

How many legs do they have?

How do they breathe?

Others Examples

They have scales that cover and protect their body

They are born from eggs.

They have 4 limbs or no limbs.

They breathe with their lungs

Most are carnivores. Others are omnivores.

Crocodiles, snakes, lizards …

DID YOU KNOW?

They swallow the food!!They don’t chew the food!!

Snakes swallow their food without chewing it. After eating, they are completely inactive to help them digest.

amphibians live part of their lives in water and part of their lives on land. They live near water or damp places. Frogs, toads, newts and salamanders are amphibians.

amphibiansREPRODUCTION:-Amphibians are oviparous. They lay their eggs inthe water.-Baby amphibians live and grow in the water.-Baby amphibians do not look like adult ones.-Baby amphibians change through metamorphosisand grow into adults.NUTRITION:-Most amphibians are carnivores.-They eat small vertebrates and invertebrates, such as mice and worms

amphibians live part of their lives in water and part of their lives on land. They live near water or damp places. Frogs, toads, newts and salamanders are amphibians.

RESPIRATION:-Baby amphibians breathe with their gills.-Adults breathe with their lungs and through their skin

amphibians

PHYSICAL CHARACTERISTICS:Most amphibians have four limbs. They all have moist skin.

Some amphibians use their colours to hide themselves from predators.

Some amphibians have brightly coloured markings and skin to frighten predators.

AMPHIBIANSCharacteristics How

are they born?

How many legs do they have?

How do they breathe?

Others Examples

They have moist skin covering their body.

All amphibians lay eggs in the water

Tadpoles have no legs and adults have four legs

Babies breathe with their gills and adults breathe with their lungs.

They change through metamophosis and grow into adults

Frogs, toads, newts and salamanders.

DID YOU KNOW?

1.2 cms is too small!!

One of the smallest amphibians in the world is the little grass frog. It’s about 1.2 cms long

Fish are the biggest group of vertebrates. Fish live in fresh water or in the sea. Most fish are oviparous, but sharks, for example, are viviparous

fishREPRODUCTION:-Most fish are oviparous. Some fish keep their eggs in their mouths until they hatch.-Sharks are viviparous and give birth to live babies.

NUTRITION:-Fish can be carnivores, herbivores or omnivores.

RESPIRATION:-They breathe with their gills.

fish

PHYSICAL CHARACTERISTICS:-They have fins and a tail which help them to move around.-Their skin is covered in scales which protect their body.

Fish are the biggest group of vertebrates. Fish live in fresh water or in the sea. Most fish are oviparous, but sharks, for example, are viviparous

Some fish live in big groups called shoals.

Some fish, such as sharks, move in packs. This helps them to hunt better

When a big group of fish moves in the same direction, it is called a school.

FISHCharacteristics How

are they born?

How many legs do they have?

How do they breathe?

Others Examples

They have scales covering their skin.

Most fish are born from eggs

They don’t have legs. They have fins and a tail

They breathe through their gills

They live in freshwater or in the sea.

Tuna, piranha, ray, eel, seahorse,

DID YOU KNOW?

So, electric eels canProduce 600 volts.

That’s a lot!!

Electric eels can produce 600 volts of electricity. That’s enough electricity to kill a horse!!