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The Life of an Animal

The Life of an Animal. Chapter 1 Topic 3 3 rd grade. How does an organism change as it grows?. All organisms go through stages in their lives. This is called an organism’s Life Cycle. Stages in the life cycle. Birth – The organism’s life begins.

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The Life of an Animal

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  1. The Life of an Animal Chapter 1 Topic 3 3rd grade

  2. How does an organismchange as it grows? All organisms go through stages in their lives. This is called an organism’s Life Cycle

  3. Stages in the life cycle • Birth – The organism’s life begins. • Growth and change – The organism gets larger. It may take on a new form. • Reproduction – The organism creates new organisms like itself. • Death – The organism’s life ends.

  4. Life cycle of a monarch butterfly • Egg • The female lays eggs on a leaf. Each egg grows until it is ready to hatch.

  5. Life cycle of a monarch butterfly • Caterpillar • After about 1 week, a caterpillar hatches from the egg. The caterpillar eats often. It is storing food energy for the next stage in its life cycle.

  6. Life cycle of a monarch butterfly • Pupa • The caterpillar stops eating. It forms a hard case around itself called a pupa. Inside, the caterpillar goes through many changes.

  7. Life cycle of the monarch butterfly • Adult • After about a week, the adult butterfly comes out. Its body is now completely different. A female butterfly will lay eggs to start a new life cycle.

  8. Some get larger as they get older. Some go through metamorphosis. All organisms change

  9. Metamorphosis means a change in the body form of an organism.

  10. Almost all animals come from eggs. Some hatch outside of the mother’s body, like frogs and birds. Some grow and develop in the female’s body. They look like the adults. They do no undergo metamorphosis. Life cycles of other animals Bear (bear, young cub, adult) Bird (bird, young bird, adult) Turtle (turtle, young turtle, adult) What are the life cycles of Other Animals?

  11. Inherited traits Characteristics that come from your parents. Examples: eye color height Learned traits Something you are taught or learn from your own experience. Examples: learning Spanish riding a bike What Makes You YOU?

  12. Review Questions How many stages does a butterfly go through in its life cycle?

  13. Answer • 4 Birth Growth and change Reproduction Death

  14. Review question How does a butterfly go through metamorphosis?

  15. Answer • First the butterfly is an egg. • Hatches into a caterpillar. • Forms a pupa. • Butterfly breaks out of the pupa.

  16. Review question Which kinds of animals are born live? Which hatch from eggs?

  17. Born live Bears People Dogs Hatch from eggs Butterflies Frogs Birds Turtles Answer

  18. Review question Suppose you have a dog that likes catching balls. Is this an inherited trait or a learned trait? Explain.

  19. Answer It is a learned trait because it is something that has to be taught.

  20. Review question You are asked to study the adult stage of a moth. In what form would the moth be right before it becomes an adult?

  21. Answer The pupa form.

  22. That’s all folks! Mrs. Rolf

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