Waves Energy and Communication in Dolphins and Computers

Scientist Rachel introduces a unit for fourth graders on Waves, Energy, and Information, focusing on dolphin communication in Blue Bay National Park. Students are tasked with investigating how dolphins communicate underwater, particularly between mothers and calves. The lesson includes listening to dolphin sounds and a story about a girl named Maria to explore sound transmission. Students are encouraged to think about how sound travels and how computers help in communication.

What is the main focus of the new unit introduced by Scientist Rachel?

• Weather and Climate

• Plants and Photosynthesis

• Waves, Energy, and Information

• Space and Astronomy

What is the name of the place where many bottlenose dolphins live?

• Yellow Bay

• Blue Bay

• Red Bay

• Green Bay

What does Scientist Sunny believe about dolphin communication?

• They use body language

• They use sound

• They use telepathy

• They use light signals

What is the main question of the chapter regarding dolphins?

• How does a mother dolphin communicate with her calf across a distance?

• How do dolphins find food?

• How do dolphins swim so fast?

• How do dolphins sleep?

What did the students notice about the dolphin calls?

• They were silent

• They had high squeaks and were different

• They were all the same

• They were all low-pitched

What should students do before moving on in the lesson?

• Write down their favorite animal

• Write down their first ideas about sound

• Solve a math problem

• Draw a picture of a dolphin

What surprised Maria while she was doing her homework?

• A phone ringing

• Her brother shouting

• A change in the music

• A loud noise from outside

How did the sound get from the computer to Maria?

• Through the floor

• Through the air

• Through the walls

• Through the ceiling

Why did the music suddenly surprise Maria?

• It was a new song

• It changed unexpectedly

• It stopped completely

• It became very quiet

How do computers help humans send information across distances?

• By using paper mail

• By using electronic signals

• By using light signals

• By using sound waves