1. 4/30 & 5/1- 7th Grade Agenda
Learning Objective: Learn about arachnids & echinoderm
Collect HW: Reading & Notetaking 212 – 213
Snail Lab
Video: Life in the Undergrowth
Textbook Reading 438 – 439
HW: Reading & Notetaking 214– 215

2. Reflection
Prompt: Describe 2 differences between insects and arachnids.

3. What are Arthropods? Arthro = “Jointed” Pod = “Foot” Insects Spiders
Scorpions
Lobster
Crab
Shrimp
Centepedes

4. Comparing Arthropods

5. Some arthropods have blue blood
Horseshoe crabs have blue blood
The have hemocyanin (which contains copper) instead of hemoglobin (which contains iron) in their blood
They are more closely related to spiders and scorpions
Has not changed much in 450 million years

6. Which type of animal is most numerous in the world?
Insects! 73% of all animal species are insects.
Which type of animal is most numerous in the world?

7. What are the characteristics of insects?
Invertebrates (Doesn’t have a backbone)
Exoskeleton (Exo = outside, skeleton)
Arthropod (Arthro = jointed, Pod = Leg)
3 pairs of legs
1 pair of antennae
Most insects have wings

8. What are Insect’s Three Body Sections?
Head
Thorax
Abdomen

9. What is found on an insect’s Head?
Head: Most of an insect’s sense organs, such as the eyes, mouth and antennae, are located on the head.

10. What is found on an insect’s Thorax?
Thorax: An insect’s midsection is the section to which wings and legs are attached.

11. What is found on an insect’s Abdomen?
Abdomen: Inside the abdomen are many of the insect’s internal and sexual organs. Small holes on the outside of the abdomen allow air, which contains oxygen, to enter the body.

12. What is Complete Metamorphosis?

13. Caterpillar Anatomy

14. What is Gradual Metamorphosis?

15. How big is the world’s largest Insect
Titan Beetle
7 inches long

16. Can you spot an insect here?
Dead Leaf mantis
Sand Grasshopper

17. Can you spot an insect here?
Walking stick insect
Grasshopper

18. Giant Millipedes
African black millipede
15 inches long

19. What are Arachnids? Ticks, Mites, Scorpions & Spiders
two body sections
four pairs of legs

20. What is the world’s largest spider?
Goliath bird-eater Spider
Eats mainly insect but will also eat lizards, bats and birds
12 inches long
Lives in South America
Female will eat the male after mating

21. How many eyes does a spider have?
Most have 8 eyes
Some spiders have 6, 4, 2, 0 eyes
But most spiders have 8 eyes

22. How does spiders smell and hear?
Spiders smell and hear with tiny hair on its legs

23. What are some examples of Echinoderm?
Star Fish
Sea Urchin
Sea Cucumber
Sand Dollar

24. What are the characteristics of Echinoderms?
Echino = “Spiny”, Derm = “Skin”
Endoskeleton: Endo = inner, skeleton
Five part radial symmetry
Internal fluid system: Water vascular system

25. Echinoderm’s Body

26. Echinoderms are more closely related to humans than sponges
Starfish Larva
(Bilateral Symmetry)
Mature Starfish
(Radial Symmetry)

27. Reflection
Observe and draw a trout.