Good morning Ganymede!
Sing, dance, and clap out all the syllables in this catchy song.
Start with 10 minutes on TTRockstars.
Work through the pictures below and then answer the questions in your workbook on page 109-110.
This week's spellings are below. Write each word THREE times and then use each one in a sentence.
Read a book from home, listen to a story on Storyline Online or login into Oxford Owl here. Click on 'My class login' and enter the username: studley password: studley
How does the story hook you in at the beginning? Make a list of words and phrases that you feel are effective in making you want to read on.
Have you ever wondered what causes the waves in the ocean?
Sometimes in life, things are not as they seem.
Footsteps could be heard in the distance. Not careful, quiet footsteps, like those someone like you might make as you move about your living room. No. These footsteps were different: they shook the very earth with every colossal stride. He was coming…
We can all make money disappear, but your family won’t believe their eyes as their coin vanishes right in front of them in this week’s experiment. You’ll leave them reflecting whether it was all just smoke and mirrors…
Before setting up the trick, it’s important to know that it only works if you’re looking at it from the side (not the top) so set up a chair for the members of your family you want to amaze and astound. Now you’re ready to get started.
Making the coin disappear might seem like magic, but like many optical illusions it only works if you're looking at it from a specific angle.
When you look at a coin normally, you can see it because light bounces off it in all directions and some of that light travels in a straight line to your eye.
In the first part of the trick, with the coin underneath the empty glass, things are a little bit more complicated. Light bouncing from the coin now has to travel through the air, the bottom of the glass, the air again, the side of the glass and – finally – though the air to your eyes.
Each time the light goes from one material to another it changes direction but most of it still gets through and so your family can still see the coin.
But only most of the light reaches your family, a small amount will be reflected off the side of the glass instead, bouncing back inside the glass and not reaching your eyes.
Whether the light travels through a material or gets reflected depends on the angle the light is travelling at and the materials it is travelling between. That is why adding water to the glass is the final stage to our trick. The light from the coin at the bottom now has to travel through:
But the water changes the angle enough that instead of leaving the glass all of the light is reflected. When 100% of the light reflects in this way it's called total internal reflection.
With the glass filled all the way to the top, none of the light from the coin at the bottom can escape through the sides. It’s trapped. It can never reach your eyes and so the coin seems to vanish.
Of course this only works if you’re looking through the side of the glass. We need a lid for the top so no one can see in. This is also why you need a straight edged container; the size doesn’t matter, but it can’t have any curvy bits or the light can "leak" out.
Knowing the physics behind what’s going on will help you set everything up, and soon you‘ll have all your family wanting to know the secret of the vanishing coin. Lifting the lid gives a clue – there's a very clear reflection of the coin and if they look closely the writing is back to front. Our five layers combine to make the perfect mirror.