1. 10.3 Insects

2. POINT > Describe insect characteristics POINT > Describe the body structure of an insect POINT > List groups and examples of insects POINT > Describe 2 types of metamorphism POINT > Discuss how insect mouthparts are adapted

3. POINT > Describe insect characteristics
Insects are arthropods with 3 body segments 3 pairs of legs (6 legs) 1 or 2 pair of wings One pair of antennae Mouthparts adapted for eating different foods

4. POINT > Describe the body structure of an insect
Insects: 3 body segments: 1. Head has sensory organs (eyes, antennae) 2. Thorax where legs and wings are attached to body 3. Abdomen contains many of the insects’ organs and tubes that carry oxygen to the cells

5. CHECK:
What are 3 characteristics of insects? What are the three body segments in insects? What is the thorax? What is the abdomen?

7. POINT > List examples of insects
Orders of insects:
Orthoptera: grasshoppers, crickets, locusts
Lepidoptera: butterflies and moths
Hymenoptera: bees, wasps, ants

8. POINT > List examples of insects
Orders of insects:
Diptera: flies
Coleoptera: beetles
Dictyoptera: cockroaches and mantids

9. CHECK:
Which order of insects includes butterflies? Which order of insects includes grasshoppers? Which order of insects includes flies? Which order of insects includes bees and ants? Which order of insects includes beetles?

10. POINT > Describe 2 types of metamorphosis
Metamorphosis: the insect body changes over time
All insects go through metamorphosis
1. Complete metamorphosis – 4 stages
egg  larva  pupa  adult
2. Incomplete/gradual metamorphosis – 3 stages
egg  nymph  adult

11. POINT > Describe 2 types of metamorphosis
Complete metamorphosis: 4 stages
Ex. flies, ants, beetles, butterflies

12. POINT > Describe 2 types of metamorphosis
larva
larva

13. POINT > Describe 2 types of metamorphosis
Gradual metamorphosis: 3 stages Ex. termites, grasshoppers, dragonflies
The nymph does not have wings
The adult does have wings

14. CHECK:
What are the four stages in complete metamorphosis? What are the three stages in gradual metamorphosis? What are 3 characteristics of all arthropods? Which group of mollusks includes snails and slugs? Which main group of arthropods have 8 legs and no antennae?

15. POINT > Discuss how insect mouthparts are adapted
As a group, insects eat almost anything edible
Different insects have specialized mouthparts for eating different foods
Chewing, sucking, sponging, cutting, etc

18.
David Attenborough videos on Promethean Planet
(stick insect)
(David Attenborough)

19. HOMEWORK
Read S.A. Page 347 #1-3 GRAS Complete Study Guide