Patterns & Models
What do we call something scientists make to help them visualize things they cannot easily see?
a model
What is a wave in this unit's definition?
A pattern of motion that travels away from a source.
What animal is the focus of this unit's investigation into communication?
bottlenose dolphins
What is "energy" defined as in this unit?
Energy is the ability to make things move or change.
Besides sounds, name one way humans can send information across distances mentioned in the unit.
Spoken words, visual signals, binary code (digital)
When we say a "pattern" in science, what does that mean?
A pattern is something observed to be similar over and over again.
what does pitch mean ?
how high or low a sound is
What do dolphins use that is unique to each individual to identify one another?
Signature whistles.
In a wave, what travels from the source to the listener — the matter or the energy?
Energy travels; the matter (water/air) moves only a little.
What is binary code made of (what two symbols)?
0's and 1's
Name two physical classroom models used in this unit to show different kinds of wave motion.
rope and spring toy
What do we call the distance between two peaks of a wave?
How do dolphins use pitch and volume differences to help a calf recognize its mother?
Pitch (wavelength) changes signal pattern unique to mother; amplitude affects how loud it is so calf can detect it.
Give one everyday example that shows energy moving but matter mostly staying in place
Stadium wave (people raise arms = energy travels; people mostly stay in place).
Name 3 binary codes we did
image, zeros and ones, and musical notes
Why do scientists say "no model is perfect"? Give one example of a limitation of the Sound Waves Simulation.
No model is perfect because it simplifies or changes scale — e.g., the Sim makes particles huge so you can see them.
How does wavelength relate to pitch (higher/lower)?
Shorter wavelength → higher pitch; longer wavelength → lower pitch.
When listening to dolphin calls, scientists often use visual tools. Name one visual representation
Waveform (amplitude over time) or frequency/pitch over time). amplitude or frequency.
Explain why sound can travel through solids, liquids, and gases but not through a vacuum.
Because mechanical waves need particles to collide and transfer energy; vacuum has no particles.
Give one advantage of encoding information as patterns (codes) when sending messages over long distances.
Codes let you see the message
Explain how comparing two different models (e.g., rope and spring toy) can help scientists learn about sound waves.
Comparing shows shared features (what is essential) and differences (limitations) to refine ideas.
Describe in student-friendly language what amplitude is
Amplitude = height of the wave; larger amplitude → louder sound.
Explain how a calf can hear a mother's whistle even when the water between them does not move far — use the idea of particles and energy.
Energy travels via particles colliding; each particle moves a little and transfers energy to neighbors until the calf's ear detects it.
Describe how particle collisions transfer sound energy through water
The Source vibrates nearby particles and they move and collide to transfer energy to the next particles
What communication uses short and long sounds?
Morse code