Brainpop- Mollusks

What bodily feature do you have, but all mollusks lack?

• Skin

• Backbone

• Arms

• Eyes

Tags

NGSS.MS-LS4-2

How do mollusks produce shells?

• They secrete a special material called "nacre" through the skin in their mantle

• They are born with shells

• They "steal" empty shells from other animals

• They form them out of sand, dirt, and other natural materials

Which term best describes mollusks' feet?

• Paired

• Microscopic

• Vestigial

• Multipurpose

In what way are octopuses different from slugs?

• Octopuses eat plant material; slugs eat meat

• Octopuses have gills; slugs have lungs

• Octopuses have mantles; slugs don't

• Octopuses have no shells; slugs have shells

Tags

NGSS.MS-LS4-2

What might happen if a snail couldn't produce mucus?

• It wouldn't be able to breathe

• It wouldn't be able to digest food

• It would have trouble moving around

• It wouldn't be able to grow a shell

How is the blood flow inside a clam's body different from the blood flow inside of your body?

• Clams don't have veins or arteries

• Clams don't have hearts

• A clam's blood does not deliver oxygen to its organs

• The blood inside a clam's body doesn't circulate

Tags

NGSS.MS-LS4-2

The prefix "bi-" means "two." With this in mind, what can you infer about the name "bivalve?"

• It refers to bivalves' two hearts

• It refers to the two segments of bivalves' shells

• It refers to bivalves' two feet

• It refers to the fact that bivalves have both lungs and gills

Tags

NGSS.MS-LS4-2

How do squid and octopi move?

• With their muscular feet

• By drifting along with ocean currents

• By squirting water through a siphon

• By waving their tentacles

Compared to a snail, an octopus is:

• Smarter

• Smaller

• Deadlier

• More social

Why might an octopus change the color of its skin? Choose the best answer.

• To frighten nearby fish

• To attract other octopuses

• To reflect its mood

• To hide from predators

Tags

NGSS.MS-LS4-4