Urchins and Tests

Urchins and Tests

Multiple Choice

What urchin feature is pictured?

• Test

• Tube Feet

• Spines

• Nerve Ring

Multiple Choice

What are the tube feet used for?

• Digesting

• Protection

• Walking and grabbing

• Breathing

Multiple Choice

Identify the gonads.

• A

• B

• C

• D

Many cultures consider urchin gonads (ovaries and testicles) to be a delicious food.

Poll

Would you be willing to eat urchin gonads?

• Never

• Maybe

• Definitely

• Only for $10,000

Multiple Choice

What part of the urchin is featured?

• Digestive System

• Gonads

• Water Vascular System

• Aristotle's Lantern

Multiple Choice

Here is an internal view of the Aristotle's Lantern. What is it used for?

• Reproduction

• Scraping food to eat

• Protection from predators

• Moving around the ocean floor

Multiple Choice

The urchin shell is known as the:

• Quiz

• Skull

• Ribs

• Test

The urchin test is made of CALCIUM CARBONATE

(Calcium also makes our bones strong)

In fact, ALL of these animals need calcium carbonate for their shells as well.

Multiple Choice

Which animal does NOT need calcium carbonate for their shell?

• Octopus

• Snail

• Clam

• Urchin

Something is happening to the calcium carbonate in the water...

Here are the consequences:

The problem is actually starting in the air

Multiple Choice

What is the trend for carbon dioxide in the air?

• It is in homeostasis

• It is increasing

• It is decreasing

• Not enough information

Multiple Choice

About how much of the atmospheric CO2 have the oceans absorbed?

• All of it

• 1/2 of it

• 1/3 of it

• None of it

Multiple Choice

What affect is the increase in CO2 having on sea creature shells?

• Making them stronger

• Making them weaker

• Not affecting them at all

Multiple Choice

More CO2 in the water means:

• More carbonate for shells

• No affect on calcium carbonate for shells

• Less carbonate for shells

• Stronger shells

Multiple Choice

No clams and shellfish means:

• There will be a trophic cascade in the ocean

• Less photosynthesis

• There will be more fish

• The ocean will be unaffected

Multiple Choice

Oceans are getting

• Less acidic than they have been in 20 million years

• Larger

• Unaffected by the changes

• More acidic than they have been in 20 million years

Multiple Choice

What can humans due to help stop this from happening?

• Burn more fossil fuels

• Burn less fossil fuels

• There is nothing we can do

• Eat more shellfish