Fun Friday – how to make an ocean in a bottle

Fun Friday – how to make an ocean in a bottle

It is a simple and easy Fun Friday experiment today – how to make an ocean in a bottle

All you need for this experiment is…

  • an empty clear plastic bottle (a 1 or 2L soft drink bottle will work fine)
  • water
  • cooking oil (any kind)
  • Blue food colouring
  • A funnel

What you do…

  1. Using the funnel fill the plastic bottle about one third full with water
  2. Add a few drops of food colouring to colour the water blue
  3. Using the funnel again fill the bottle with the oil (you will notice that the water and oil will quickly settle into two separate layers)
  4. Close the lid tightly on the bottle and turn the bottle on its side
  5. The water layer will be on the bottom of the bottle
  6. If you rock the bottle from side to side you can create a wave like motion of the water, looking just like a little ocean in a bottle; see what kind of waves you can make!

How does it work…

This is a good experiment to explain density

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Fun Friday – Transpiration

Fun Friday – Transpiration

What is transpiration?

Transpiration is the process whereby water is taken into a plant by the roots, transported up through the plant and released from the leaves as water vapour!

Lets learn more!

Transpiration is a bit like perspiration (sweating) in humans – it helps to keep the plant cool! As the water vapour transpires out of tiny holes (called stomata) fresh water is drawn up from below. This means there is always an unbroken tower of water running from the bottom to the top of the plant at all times. Water travels up the plant through tubes called Xylem. The constant flow of water through the xylem tubes of the plant is called the transpiration stream; this stream keeps the stem firm so that it can support the weight of the plant. Plants put roots down into the soil to draw water and nutrients up into the plant.
Daintree Rainforest: Image source Wikimedia Commons
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Transpiration accounts for up to 10% of water in the atmosphere! Some trees can loose hundreds of thousands of litres of water in a single day through transpiration! The water vapour trees transpire

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What’s your favourite colour?

What’s your favourite colour?

With three children in my house I get asked a lot of questions.  “Whys?” “What ifs?” “How comes?” are all part of the household daily dialogue.  Apparently, the average three year old asks at least 50 questions

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