NZ Census

Year 8 Electronics Final Presentation

Electronics

SYNONYMS

Why Do Stars Twinkle

The scientific name for the twinkling of stars is stellar scintillation (or astronomical scintillation). Stars twinkle when we see them from the Earth's surface because we are viewing them through thick layers of turbulent (moving) air in the Earth's atmosphere.

Why Do Cats Always Land On There Feet

The cat righting reflex is a cat's innate ability to orient itself as it falls in order to land on its feet. The righting reflex begins to appear at 3–4 weeks of age, and is perfected at 6–7 weeks. Cats are able to do this because they have an unusually flexible backbone and no functional clavicle (collarbone).

Why Does Hair Turn Grey

As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color — like gray, silver, or white — as it grows.

Why do bees Buzz

A bee's wings makes it buzz. When an insect flies, the size of its wings and the speed of their flapping affect the sound they make. Small wings push against less air than big wings do, so they have to beat faster in flight.

Why Do We Have To Sleep

Researchers have also shown that after people sleep, they tend to retain information and perform better on memory tasks. Our bodies all require long periods of sleep in order to restore and rejuvenate, to grow muscle, repair tissue, and synthesize hormones.

Why Don't The Oceans Freeze

Ocean water freezes just like freshwater, but at lower temperatures. Fresh water freezes at 32 degrees Fahrenheit but seawater freezes at about 28.4 degrees Fahrenheit , because of the salt in it. When seawater freezes, however, the ice contains very little salt because only the water part freezes.

Why Is Laughter Infectious 

According to a new study, laughter truly is contagious: the brain responds to the sound of laughter and preps the muscles in the face to join in the mirth. "It seems that it's absolutely true that 'laugh and the whole world laughs with you," said Sophie Scott, a neuroscientist at the University College London.

What Causes A Rainbow

A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.

Reflective Writing

 M Y  S U C C E S S  T H I S  W E E K  WAS A T H L E T I C S   because I did pretty well in it. I got 3rd in basically every event except 100m final where I got 4th but it was still really fun and one of the highlights of the year although I felt really good but really sore for a couple days. 

Another one was doing a live broadcast with Mr Cottrill in media studies, it was really fun working cameras and seeing how everything works in the filming business I was the interviewer in the broadcast. we spent a week learning about a story about the gold rush in Otago and then the last two rehearsing and then eventually doing it. 

M Y  C O N C E R N S  T H I S  W E E K 

Are not getting a placing in the 100m final in athletics because if I did I would be on a streak of third places for everything except the throwing ones. This isn't really a concern but I wish that we got to do media studies for longer because that was a special experience.

M Y  G O A L S  F O R  N E X T  W E E K  A R E

I am looking forward to working in another class for two days next week because I reckon that will be fun seeing what it's like with another teacher in another class doing different things while the Masterton cultural exchange is going on.

Emergency Lights

In electronics we have been making emergency lights. First of all we got a template of a vehicle, the vehicle had to be a vehicle that had flashing lights so for instance it had to be a police car or a fire engine, so I chose a police car and then I glued it onto a piece of corflute then I drilled holes where I wanted my leds to go after I finished that put copper tape on the sides and put my leds in the holes, after that I soldered the v+ wires to the copper tape so that leads me to where I am now.