A sand dollar is a type of sea urchin. Many are flat, but others that are more rounded are called sea biscuits. Sand dollars are related to starfish and sea cucumbers. Sand dollars are often found together on the ocean floor or seabed. They eat small sea creatures, algae, and the remains of animals that reach the ocean floor. Sand dollars have spines, and thus, have few natural predators.

In the ocean, sand dollars can be a variety of colors including brown, green, blue, and purple. People usually see them when they wash up on the sand. By this time, they are often broken and bleached white by the sun. The sand dollar got its name for its resemblance to a silver dollar when found on the sand.

Which is NOT true about the sand dollar?
1. They are related to sea cucumbers.
2. They have a lot of predators.
3. They are often found together.
4. They eat algae.
Why do sand dollars look white when they are found on the beach?
1. They are cold.
2. They have been bleached by the sun.
3. They look like silver dollars.
4. They are trying to hide.
Which of the following is TRUE about the shape of the sand dollar?
1. All are flat.
2. None are round.
3. Some are flat and some are round.
4. None are flat.
What does the author tell you about sea cucumbers?
1. They are rounded sand dollars.
2. They eat sand dollars.
3. They can be brown, green, blue, or purple.
4. They are related to sand dollars.
Which of the following does NOT belong?
1. sea biscuit
2. sea horse
3. sea cucumber
4. starfish