Coral Reefs and Symbiotic Relationships

What is a coral reef?

• A deep trench in the ocean

• A shallow place in the ocean

• A large rock formation on the seabed

• A type of underwater mountain

How are coral reefs formed?

• By large underwater volcanoes

• Through the accumulation of sand and rocks

• By tiny underwater animals

• From discarded human waste

Why was Phoebe upset with Wanda about the treasure chest?

• Wanda made the treasure chest too small

• Miss Frizzle instructed them to work on decorations together as partners

• Wanda used the wrong color for the treasure chest

• Phoebe wanted to make a different decoration

What made Ms. Frizzle's ancestor, Redbeard, an unusual pirate?

• He only stole gold and jewels

• He took his victims on adventures instead of making them walk the plank

• He sailed a ship that could also fly

• He never actually found any treasure

What marine animal looks like a plant but is actually an animal?

• A sea anemone

• A coral polyp

• A jellyfish

• A starfish

What benefit does a sea anemone provide to a hermit crab in their partnership?

• It helps the crab find food.

• It provides camouflage.

• It stings predators for protection.

• It helps the crab move faster.

Which marine animal is known for digging burrows in the coral rubble?

• Goby fish

• Pistol shrimp

• Hermit crab

• Sea anemone

What is the primary benefit a remora receives from its relationship with a shark?

• Protection from predators.

• A free ride and food from parasites.

• Assistance in finding mates.

• Help with building nests.

What are coral reefs primarily made of?

• Soft-bodied organisms.

• Limestone skeletons built by polyps.

• Accumulated sand and shells.

• Large underwater plants.

What do algae provide to coral polyps in their symbiotic relationship?

• Protection from predators.

• A safe place to live.

• Food from sunlight and waste products for reef building.

• Assistance in reproduction.