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The Basic Needs of Animals

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  1. 1. Animal Growth and Adaptations How Animals Meet Their Needs
  2. 2. Where Animals Meet Their Needs <ul><li>all animals have some basic needs in common </li></ul><ul><ul><li>food, water, and shelter </li></ul></ul><ul><li>environment: everything that surrounds and affects an animal, including living and nonliving things </li></ul><ul><ul><li>all the basic needs of an animal can be met in its environment </li></ul></ul>
  3. 3. The Need for the Right Climate <ul><li>Climate: the average temperature and rainfall of an area over many years </li></ul><ul><ul><li>desert climate: very little rainfall and dry all year </li></ul></ul><ul><li>Vultures, foxes, snakes, tortoises, kangaroo rats, and other small animals live in the desert </li></ul><ul><ul><li>Vultures live in cacti, bushes, or small trees </li></ul></ul><ul><ul><li>Kangaroo rats and foxes live in burrows in the ground </li></ul></ul>
  4. 4. <ul><ul><li>Tortoises and kangaroo rats feed on leaves, fruit, and seeds of desert plants </li></ul></ul><ul><ul><li>Vultures, snakes, and foxes feed on other animals </li></ul></ul><ul><ul><ul><li>desert animals must get water from the food they eat </li></ul></ul></ul>Click here for more info on desert animals!
  5. 5. The Need for Oxygen <ul><li>Oxygen: one of the many gases in the air </li></ul><ul><ul><li>land animals get oxygen by breathing air into their lungs </li></ul></ul><ul><ul><li>ocean mammals come to the water’s surface to breathe air into their lungs </li></ul></ul>
  6. 6. <ul><ul><li>fish get oxygen from water </li></ul></ul><ul><ul><ul><li>fish and other water animals have gills </li></ul></ul></ul><ul><ul><ul><li>as water passes through the gills water passes into their blood </li></ul></ul></ul>
  7. 7. The Need for Food <ul><li>animals need energy to live and grow </li></ul><ul><ul><li>animals get energy from the food they eat </li></ul></ul><ul><li>different animals eat different food </li></ul><ul><ul><li>zebras eat grass </li></ul></ul><ul><ul><li>rhinos eat low shrubs </li></ul></ul><ul><ul><li>giraffes eat leaves from tall trees </li></ul></ul><ul><ul><ul><li>These are plant eaters </li></ul></ul></ul>
  8. 8. <ul><li>some animals are meat eaters </li></ul><ul><ul><li>lions, wild dogs, and leopards </li></ul></ul><ul><li>some animals eat both plants and meat </li></ul>Compare
  9. 9. The Need For Shelter <ul><li>most animals need shelter in their environment </li></ul><ul><li>shelter: a place where an animal is protected from other animals or from the weather </li></ul><ul><ul><li>foxes find/dig shelters </li></ul></ul><ul><ul><ul><li>gray fox may climb a tree to find a hollow place </li></ul></ul></ul><ul><ul><ul><li>arctic fox may dig into the snow </li></ul></ul></ul><ul><ul><ul><li>Desert fox may dig connecting tunnels under the sand </li></ul></ul></ul>
  10. 10. <ul><li>rocks, logs, leaves can be a shelter </li></ul><ul><ul><li>almost anything in an environment can be a shelter </li></ul></ul><ul><ul><ul><li>rock shelter for a snake </li></ul></ul></ul><ul><ul><ul><li>woodpile shelter for a field mouse </li></ul></ul></ul><ul><ul><ul><li>rotting log on the forest floor for insects </li></ul></ul></ul>
  11. 11. Animals and Their Young <ul><li>all animals need young </li></ul><ul><ul><li>without young all of a species would die out </li></ul></ul><ul><li>young grow, become adults, and produce more young </li></ul><ul><li>animals grow and develop in different ways </li></ul>
  12. 12. <ul><li>insects like butterflies </li></ul><ul><ul><li>lay hundreds of eggs </li></ul></ul><ul><ul><li>eggs hatch into larvae called caterpillars </li></ul></ul><ul><ul><li>as the caterpillar grows it molts (sheds it’s outer skin) </li></ul></ul><ul><ul><li>the last time it molts it seals itself in a tough shell (chrysalis) </li></ul></ul><ul><ul><ul><li>Inside the chrysalis the caterpillar’s body changes </li></ul></ul></ul><ul><ul><li>an adult butterfly breaks out of the chrysalis </li></ul></ul><ul><li>the process of change from an egg to an adult butterfly is called metamorphosis </li></ul><ul><ul><li>almost all insects, invertebrates that live in water, and amphibians go through metamorphosis </li></ul></ul>
  13. 13. <ul><li>birds, fish, reptiles, and mammals do not go through metamorphosis </li></ul><ul><li>mammals </li></ul><ul><ul><li>young are born or hatched </li></ul></ul><ul><ul><li>have a few young at a time </li></ul></ul><ul><ul><li>care for their young until they are old enough to live on their own </li></ul></ul><ul><ul><ul><li>koala’s give birth before young koala’s are fully developed </li></ul></ul></ul><ul><ul><ul><ul><li>the newborn lives in it’s mother’s pouch and develops for 6 months </li></ul></ul></ul></ul><ul><ul><ul><ul><li>then it rides on it’s mother’s back for another 6 months </li></ul></ul></ul></ul>
  14. 14. Summary <ul><li>Animals have basic needs in common </li></ul><ul><ul><li>they need the right climate, oxygen, food, water, and shelter </li></ul></ul><ul><li>Animals must reproduce in order to survive </li></ul>
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