Week 14 Review (6th grade)

Front

What are spicules?

Back

Spicules are thin, glassy spines found in some sponges that provide structural support.

Front

Which group of mollusks is known as 'head-footed'?

Back

Cephalopods are known as 'head-footed' mollusks, which include octopuses and squids.

Front

What conditions are required to form manmade fibers?

Back

Manmade fibers must be formed under high heat.

Front

How do the spicules of a glass sponge function?

Back

The spicules of a glass sponge act like optical fibers, helping to gather and transmit light.

Front

What allows spicules to bend and gather light even when cracked?

Back

Spicules have layers that allow them to bend and gather light.

Front

Define 'mollusk'.

Back

Mollusks are a diverse group of invertebrates that include snails, clams, and octopuses.

Front

What is the primary function of spicules in sponges?

Back

The primary function of spicules in sponges is to provide structural support and protection.

Front

What are the three main groups of mollusks?

Back

The three main groups of mollusks are Gastropods, Bivalves, and Cephalopods.

Front

What is the significance of layers in spicules?

Back

Layers in spicules enhance their ability to bend and gather light, contributing to their optical properties.

Front

What is an example of a manmade fiber?

Back

An example of a manmade fiber is nylon.