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Ebook Rourke's world of science Encyclopedia: Volume 2 - Animal Life provides about what Is an Animal? Type of animals, mating and reproduction in animals, animal adaptations, how we use animals, endangered species, people who study animals. | Rourke s World of Science Volume 2 Animal Life By Kelli L. Hicks Editorial Consultant Luana Mitten Project Editor Kurt Sturm Rourke Publishing LLC Vero Beach Florida 32964 Table of Contents What Is an Animal .4 How do animals eat .4 How do animals move .5 Where do animals live .6 How are animals classified .7 Do animals change .8 Type of Animals .10 Single-Celled Organisms .11 Mollusks Sponges Starfish and Worms.12 Arachnids Crustaceans and Insects.14 Fish . . . . . . . . . . . . . . . . .17 Amphibians .19 Reptiles.20 Birds .25 Mammals .28 Mating and Reproduction in Animals.44 Mating .44 Reproduction .44 Animal Adaptations.50 Behavior .50 Defense Mechanisms .51 Hunting .52 Social Groups .54 Symbiosis .55 How We Use Animals.56 As Pets .56 In Work and Sport .57 In Scientific Experiments .57 For Food .58 Other Animal Products .59 Animal Rights .59 Endangered Species.60 Changes to Habitats .60 Pollution .61 Hunting and Poaching .61 People Who Study Animals.62 Zoology .62 Veterinarian .62 4 Animal Life What Is an Animal Animals are living creatures. They include very small creatures such as dust mites and very large creatures such as whales. Animals are multi-cellular organisms that eat food to survive. They cannot get energy from the sun like plants do. Most animals can move on their own. How do animals eat An animal needs to eat in order to live. Animals eat different things and eat in different ways. A butterfly has a proboscis that looks like a tongue and works like a straw. The butterfly keeps its proboscis curled up until it is ready to eat. Then it unrolls its proboscis and dips it into the nectar of a flower and drinks it. A chameleon shoots out its sticky tongue to catch insects. Squirrels have strong teeth and use them to crack open nuts. Then they carry the nuts in their cheeks back to their homes. An earthworm tunnels through the ground and feeds on bits of rotting plants. Animals Super-sized and microscopic. Squirrels can crack nuts with their strong .
