1. 6th Grade Notes pgs. 506-508 Mini Lab: modeling Cephalopod Propulsions
Mollusks
6th Grade
Notes pgs
Mini Lab: modeling Cephalopod Propulsions

2. Review Now…
Get out foldable from last week about flatworms/round worms.
Characteristics Flatworms Roundworms
Body Shape
Body Openings
Body Construction
Digestive System
Picture

3. Objectives Students will… Identify characteristics of mollusks
Compare the similarities and differences between an open and a closed circulatory system

4. Tapeworms Type of parasitic flatworm
To survive, it lives in the intestines of its host (including humans!)
Since it does not have a digestive system, it absorbs nutrients from digested material in the host’s intestine.
How do tapeworms get into humans?
Tapeworm length activity

5. Videos
Why parasites might not be all that bad
Flatworms
Roundworms

6. Mollusks (Conchs, Scallops, Snails, Octopus, Mussels)
Characteristics of Mollusks
Gills for water dwelling and lungs for land dwelling
Radula- scratchy tongue like organ that has rows of fine, teeth-like projections that are used to scrape off small bits of food.
Mantle- a thin layer of tissue that covers the mollusk’s soft body
Shell for protection
Foot is used for moving or for anchoring the animal
Open circulatory system-do not have vessels to contain their blood. Blood washes over organs instead.

7. Mollusks pgs. 507-508 Types Gastropods Bivalves Cephalopods
Where do they live?
How many shells?
Examples

8. Cephalopods
Most complex type of mollusks (Nautilus, Octopus, Squid, Cuttlefish)
Internal plate instead of shell
Well-developed head and a “foot” that is divided into tentacles with strong suckers
Closed circulatory system-in which blood is carried through blood vessels instead of surrounding organs
Adapted for quick movement

9. For Next Time… What are the six main characteristics of mollusks?
Read pgs
Define open circulatory system and closed circulatory system on index cards.

10. Segmented Worms
6th Grade
Pgs

11. Do Now…
Name the 3 types of mollusks.
Give an example of each type.

12. Objectives Students will…
Describe the characteristics of segmented worms
Explain the digestive process of an earthworm

13. Mini Lab- Modeling Cephalopod Propulsion
Purpose: To model cephalopod movement using balloons
Lab Procedures/Directions
Safety Precautions
Answer lab questions in complete sentences

14. Segmented Worms Other name: Annelids
Include: earthworms, leeches and marine worms
Four Characteristics
1) Bodies are made of segments or rings
2) Coelom or internal body cavity (separates the internal organs from body wall)\
3) Closed circulatory system
4) Complete digestive system with 2 body openings (pg. 509)

15. Earthworm Digestion Take soil in through mouth
Soil moves to crop where it is stored
In the gizzard, food and soil are ground.
In the intestine, food is broken down and absorbed by the blood
Undigested soil and waste leave the worm

16. Types of Segmented Worms
Where Found
Source of Energy
An Interesting Characteristic
Earthworm
Leech
Marine Worm

17. Videos
Annelids
Leeches

18. For Next Time…
Complete Self Check questions #1-4 pg in science notebook
Read pgs