Kina Making Sound Underwater

What are Kina? Well, here are some awesome facts about how sound travels underwater from a Kina. So lets get to it!

Kina use their rasping teeth to scrape on a rock to get all of the algae off. Which makes a loud sound that goes out into the sea. It also creates sound waves when they scrape their teeth.

Scraping their teeth then makes the Kina’s shell vibrate. Which means it moves like a cheetah running 70 mph (110 kmh). So when that happens, the sound would eventually reflect around the sea.

Sound waves is when the sound of the scraping teeth would spread out and create a wave of that sound. Eventually, it would make the Kina then shake (vibrate).

Besides just reflecting, meanwhile it would send out to other sea creatures (small fish). Despite the other small fish, the Kina gets more weak. Because of the energy traveling into a larger space.

Afterall, Kina can be a little annoying at times. Right? Surprisingly, Algae looks quite like seaweed or some mashed up greens! Besides that, as you can easily realise that Kina can get weak when the energy quickly goes into a larger place.

In week 4 of term 3 our class has been focusing on learning how to write great explanations about how sound travels underwater. We have expanded our vocabulary in our inquiry topic ‘The Noisy Reef,’ and learnt about the structure of a great explanation piece. It was quite a challenge, but we really enjoyed watching clips to stimulate our ideas and having discussions about terms which were new to us.