26 oct 2012
WARM BLOODED & COLD BLOODED ANIMALS
| Cold-blooded animals, like reptiles, amphibians, and fish, become hotter and colder, depending on the the temperature outside. For example, when the sun sets at night, their bodies are cooler because it is less warm outside. When the sun is out, however, their bodies soak up the heat and become warmer. |
Mammals and birds are warm-blooded, which means that they can make their own body heat even when it is cold outside. Whether it is sunny and hot outside or there is a snowstorm and it is very cold, warm-blooded animals have body temperatures that usually stay the same.
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ANIMALS REPRODUCTION
Another difference is the way animals give birth to their young (babies).
Most baby mammals grow inside their mother until they are born. This is something that makes mammals different, because most other kinds of animals do something else...
Reptiles usually lay eggs, and the babies then grow 
inside the egg until they are ready to come out.
Sometimes reptiles will give birth like mammals, without eggs.
inside the egg until they are ready to come out.Sometimes reptiles will give birth like mammals, without eggs.
Birds also lay eggs, with a very hard outer shell. Birds generally lay 1 to 17 eggs at a time
Amphibians lay thousands and sometimes millions of small, soft eggs, and they lay them in the water! The eggs are jelly-like.
Amphibian means "double life"... the early part of an amphibian's life is spent in the water, and usually as they get older then they also spend time on land. Think of a tadpole turning into a frog!!
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The process amphibians go through is called "metamorphosis". Baby amphibian looks completely different than the adult amphibians!
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Fish also lay many many eggs - sometimes millions of tiny eggs! They are also laid in the water.
SKELETON POSTER
The adult human skeleton is made of two hundred and six bones. These bones serve as a strong framework that supports our organs, muscles and skin!
25 oct 2012
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