Valerie Adams.

Valerie Adams is one of new zealands top shot putter. This year she is competing in the commonwealth games in scotland, I hope that she wins and that she brings the gold medal back home.

Echolocation.

Echolocation:

What is echolocation?

To my understanding “Echolocation” is the use of sound waves to tell the distance between human and animals and any objects. Echolocation is mainly used by blind animals or human in many different ways. They can use echolocation to find their needs, for example food and water or to get away from dangerous objects or enemies.

         

It is a very big challenge to use echolocation but blind people have learned to trust themselves. Blind people and animal can use their senses to see instead.

Sounds waves are passed from air to liquid in the inner air. The inner air also contains tiny hair cells which react to sound waves, triggering chemicals that are sent to the brain as nerve impulses

Sound.

Like many terms in science sound has different meanings. Everyday we hear sounds all around us. We use our ears to hear those sounds. These sounds can be loud or soft, high or low, and pleasant or unpleasant. The scientific meaning of sound is about understanding matter and energy. Our brains hear sound because energy moves the molecules to create sound. Vibrations move the molecules that create sound waves.

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