Discovering Dolphins: Beyond the Surface

The video explores the differences between dolphins and fish, emphasizing that dolphins are mammals, not fish. It covers their evolutionary history, morphological differences, and how they regulate body temperature. The video also compares dolphins to sharks, highlighting distinctions in their physical traits. Finally, it reviews the key points with quiz questions to reinforce learning.

Which of the following statements is true about dolphins?

• Dolphins evolved 550 million years ago.

• Dolphins have scales.

• Dolphins are mammals.

• Dolphins are a type of fish.

How do dolphins primarily breathe?

• Through their skin

• Through gills

• Through a blowhole

• Through their fins

What is a key difference in the skin of dolphins compared to fish?

• Dolphins have scales.

• Dolphins have smooth skin.

• Dolphins have feathers.

• Dolphins have rough skin.

How do dolphins regulate their body temperature?

• By panting

• By changing their skin color

• By sweating

• By swimming to warmer water

What is a distinguishing feature of a shark's dorsal fin?

• It is covered in hair.

• It is a straight, sharp triangle.

• It is horizontal.

• It is smooth and curved.

How does a dolphin's tail move when swimming?

• In circles

• Up and down

• Side to side

• Diagonally

What is the primary material of a shark's skeleton?

• Bone

• Metal

• Cartilage

• Wood