1. Insects 5th Grade

2. How can you identify insects from other Arthropods? • number of body sections (3) • number of legs (6) • pair of antennae (1) *usually have one or 2 pairs of wings

3. Body Sections (3) • Head –sense organs, eyes, antennae • Thorax– midsection where legs and wings are attached • Abdomen –inside are internal organs, small holes outside abdomen contain tubes that allow air (oxygen) to enter the body

4. Insect Body Sections

5. Insect Body Sections

6. Rule: “If it is living or if it once was living, some kind of insect will eat it.” • Leaves or nectar • Wood lice eat PAPER! • Fleas and mosquitos feed on the blood of living animals • Dung beetles feed on animal droppings • Burying beetles feed on the decaying bodies of dead animals

7. Life Cycle: Insects go through a Complete Metamorphosis or a Gradual Metamorphosis • Gradual Metamorphosis: • No distinct larval stage • Egg hatches into a nymph (looks like an adult without wings) • Complete Metamorphosis: • 4 different stages • Egg, larva, pupa, adult

8. Gradual Metamorphosis: (Dragonfly) Examples of Insects: • Grasshoppers • Termites • Cockroaches • Dragonflies

9. Complete Metamorphosis: *Examples of Insects: Beetles Butterflies Ants Flies

10. During the “pupa” phase, insects are inside a protective pupal case called a “Chrysalis”

11. Complete Metamorphosis: • Eggs • Larvae –usually look like worms • Pupa –insect is enclosed in a protective covering called a chrysalis (wings, legs, antennae form) • Adult

12. Ants • http://www.brainpop.com/science/diversityoflife/ants/