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LIGHT TOPIC - which fabric makes the best black out curtains?

 

We explored fabrics to decide which would make the best black out curtains for a person who is easily woken by light coming through their thin curtains.

We understand now some key vocabulary - TRANSPARENT - when light can pass easily through, TRANSLUCENT - when some light but not all is allowed to pass through and OPAQUE - when all light is blocked by a material and light cannot pass through.

Picture 1 Teamwork needed to shine light through the fabric
Picture 2 The black tub represents our bedrooms
Picture 3 We intensified the light by using a torch
Picture 4 Does this fabric let light through Evrim?
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INVESTIGATING HOW LIGHT TRAVELS.

By putting holes into an upturned box, we investigated when we were able to see objects we had placed under a box. We continually asked the question 'why?' Why couldn't we see something, why could we see, what effect did a torch have. The torch light looked like it was travelling in straight lines and lit up some objects but not necessarily all of them.

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SHADOWS

Next we have investigated how shadows are made. We discovered that the closer an object is to the light source, the larger its shadow will be. the further away it is from the light source the smaller the shadow. This is because, more light is blocked out by the object close up. 

SHADOWS ARE THE ABSENCE OF LIGHT.

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CONCEPT CARD CHALLENGE - we looked at a challenging idea that questioned if black card or white card cast the same shadow. So we put it to the test.

We found it all depends on the thickness of the card. There's not necessarily a difference in the 2 types of card we tested.

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SUNDIAL

TO SHOW HOW A SHADOW CAN HELP TRACK THE EARTH’S MOVEMENT AROUND THE SUN AND GIVE US TIME.

 

THIS THIN PAPER STILL CAST A SHADOW AND OUR SUNDIALS COULD GIVE US A TIME EVEN TO HALF PAST THE HOUR.

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ARE TWO EYES BETTER THAN ONE?

We've been thinking scientifically conducting fair tests and re-checking test. We have used our collected data to make conclusions. 

We used paper clips to test which eye could replace the clip in a specific position. We checked which eye or both could thread best/quickest through a hole in paper.

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To understand the bones and joints in our hands, we examined an x-ray then built a model of our hand using straws and pipe cleaners.

  • Each finger is made up of 3 bones and 3 hinge joints.
  • Hinge joints have limited movement compared to ball and socket joints.
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HUMAN SKELETON

To start our science topic on the skeleton and movement, we used dog biscuits to demonstrate our understanding of the human skeleton. 

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Picture 4 An impressive diagram of our hand bones
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Picture 7 The girls knew about rib cages.
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Now we made 'dog bone' diagrams after we had seen x-rays of our skeleton and a detailed x-ray of our skull.
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Finally we transferred our new understanding and create superb 'dog bone' diagrams of a dog's skeleton.
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Roald Dahl Science – Rocket Balloons

We worked in teams.

We observed what made our balloons move – the power of air pushing the balloon as the air rushed out.

We learnt how hairy string slowed down the balloon. “This is friction,” said Alfie.

“By blowing more air in, the balloon will travel faster and further,” explained Peter.

Peter also observed that the sellotape and the more air could weigh the balloon down and also slow down the balloon.

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We put what we had learnt about the power of air into action.

We built a vehicle and tried to use trapped air in the balloon to power it.

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