How do marine mammals like dolphins benefit from the speed of sound in water?

• They can breathe underwater.

• They can communicate over long distances.

• They can see better.

• They can swim faster.

What is a signature whistle in dolphins?

• A sound used to navigate.

• A sound used to scare predators.

• A unique sound used to identify themselves.

• A sound used to locate food.

How do dolphins use their signature whistles?

• To signal danger.

• To attract mates.

• To identify themselves to other dolphins.

• To find their way back home.

What is the term for sounds that are too high-pitched for humans to hear?

• Hypersound

• Supersound

• Ultrasound

• Infrasound

Why can't humans hear all the sounds dolphins make?

• Dolphins make sounds at frequencies outside the human hearing range.

• Humans are not paying attention.

• Humans are not in the water.

• Dolphins are too far away.