Problem Analysis:
The task involves understanding the characteristics of mollusks, specifically focusing on
chitons and
chambered nautiluses, as described in the provided text. The instructions also include labeling and coloring specific parts of these organisms based on the descriptions.
#### Key Points from the Text:
1.
Chitons:
- Mollusks that live along ocean coastlines.
- They have shells made up of overlapping plates embedded in a muscular girdle.
- The shell is divided into eight plates.
- The girdle is labeled as "tan," and the plates are labeled as "dark green."
- Chitons can roll into a protective ball when dislodged.
2.
Chambered Nautilus:
- A type of cephalopod with a spiral-shaped shell.
- The shell sections are to be colored "tan" and "brown."
- It has primitive eyes compared to other cephalopods.
- It has about 90 tentacles and no suckers.
- It uses rhinophores to detect chemicals and find food.
Solution Approach:
The problem requires:
1. Understanding the anatomical features of chitons and chambered nautiluses.
2. Labeling and coloring specific parts based on the given instructions.
#### Step-by-Step Solution:
---
1. Chitons
-
Anatomy:
- Chitons have a shell composed of
eight overlapping plates.
- These plates are embedded in a
muscular girdle that surrounds the body.
- The girdle allows chitons to cling tightly to surfaces and roll into a protective ball.
-
Labeling and Coloring:
-
Girdle: Label it as "tan."
-
Plates: Label them as "dark green."
---
2. Chambered Nautilus
-
Anatomy:
- The nautilus has a
spiral-shaped shell.
- When cut away, the shell reveals sections lined with shiny mother-of-pearl.
- The shell is divided into chambers, which give the nautilus its name.
-
Labeling and Coloring:
-
Shell Sections: Color the shell sections "tan" and "brown" alternately.
---
Final Answer:
Based on the instructions and the provided information:
1.
For Chitons:
- Label the
girdle as "tan."
- Label the
plates as "dark green."
2.
For Chambered Nautilus:
- Color the
shell sections alternately as "tan" and "brown."
This completes the task as per the requirements.
Final Answer:
\boxed{\text{Label the girdle as tan and the plates as dark green for chitons; color the shell sections of the nautilus alternately as tan and brown.}}
Parent Tip: Review the logic above to help your child master the concept of mollusks worksheet 1 answer key.
