Mr. Harper’s science mini- lesson with read-along audio

Mr. Harper’s science mini- lesson with read-along audio Different Types of Animals Click on the speaker icons to hear the spoken words

All animals must breathe in oxygen to live. All animals must release carbon dioxide to live. Oxygen in CO2 out Oxygen in Oxygen in CO2 out CO2 out Oxygen in CO2 out

All animals must eat to get the energy to live and grow.

All animals are alike in that they need oxygen and food. Now let’s look at some differences between the types of animals.

Every animal is either a vertebrate or an invertebrate. Vertebrates are the animals that have a backbone or spine.

Animals that have nobackbone are called invertebrates.

Another difference is that some animals are warm blooded and some are cold blooded. Infrared photography shows how warm things are. The dog is a warm blooded mammal. The lizard is a cold blooded reptile but the hand holding it belongs to a warm blooded mammal.

Warm blooded animals include all mammals and all birds. Their bodies use the energy in food to keep their bodies warm, ever if it’s cold where they are.

Cold blooded animals, like reptiles, insects and fish can’t heat their bodies. Reptiles like to lay in the sun when they can to get warm.

Mammals mammalsare warm blooded. They have to eat more often than cold blooded animals because mammals burnfood energy to stay warm.

Marine mammals like whales, dolphins and seals must come to the surface to breathe air. All mammals breathe air.

All mammal are vertebrates. Every mammal has a backbone as part of its skeleton. backbone backbone

All mammals give birth to live babies, but so do some reptiles and fish.

What makes mammals special is that mammal mothers allgive milk to feed their new babies. No other type of animal can do that.

Another thing that makes mammals special is fur or hair. Only mammals have hair on their bodies. Even whales have some hair.

Birds all reproduce by laying eggs. Bird parents keep their eggs warm until they hatch. All birds are warm blooded vertebrates. backbone

Birds feed their babies but they don’t give them milk.

The thing that makes birds special is feathers. Only birds have feathers to cover their bodies.

Reptiles are all cold blooded. Most reptiles lay eggs but some give birth to live babies.

Reptilesshed or molt the outer layer of their skin as they grow when the old skin gets too small.

The thing that makes reptiles really different from other animals is that their bodies are covered with scales. This helps them live in places with very little water.

There are also reptiles that spend most of their life in water, but they all breathe air for the oxygen they need.

Amphibians Amphibians are a lot like reptiles. They are cold blooded and most lay eggs when they reproduce. But amphibians have smooth skin instead of scales.

Amphibians lay their eggs in water. When they hatch, they have no legs. They swim and breathe water with gillsfor a few weeks.

As they get older and bigger, legs begin to appear. By the time an amphibian is an adult, it has four legs, and lungsthat must breathe air. The gills are gone.

The big difference with amphibians is that they go through stages of metamorphosis as they grow up. “Morph” means “change.” Amphibians undergo big changes in their lives.

Fish • come in many different shapes and sizes, but they all share these characteristics: • They live in water • They breathe water with gills • They are cold blooded • They are vertebrates (have a backbone) Fish skeletons backbone

Crustaceans are water animals and breathe water with gills but they are not fish. Crustaceans are invertebrates. Instead of a backbone on the inside they have a hard outer shell.

Insects are cold blooded invertebrates. (no back bone). Adult insects have skeletons on the outside. Insects start as eggs and go through the stages of metamorphosis. Many adult insects have wings and can fly.

Adult insects have six legs and two antennae (feelers) that give information about their surroundings. Insects’ bodies have three sections; head, thorax, and abdomen.

Spiders • are cold blooded invertebrates , but they are not insects. • Spiders have 8 legs instead of 6 like insects. • Spiders have 2 body segment rather than 3. 2 segments cephalothorax abdomen

There are many other interesting types of animals in the world that you can learn about.

Mr. Harper’s science mini- lesson with read-along audio