Properties of Water – Cohesion, Adhesion & Surface tension

The reason why water will go into a droplets is because of cohesion – some of the molecules hold on tightly to each other so it stays together. Water also has a characteristic called adhesion which causes it to spread out on most surfaces (not wax!)

In a large body of water the water molecules hold on strongly to the deeper water molecules and not as strongly to the substance (air) above it. This is called surface tension and is the reason belly flops hurt and insects and materials can float – if they are light or flattened out.

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Lift Off !

Yes – they worked! Most groups Hot air balloons rose slowly but surely towards the hall ceiling. Some stayed for a while, others lasted just a short time. It took a lot of team work, patience and candle power!!

Making Hot Air Balloons

We’d been learning about Weather and what conditions causes extreme weather to occur. Because the concept of hot air rising and cold air falling is a significant factor in weather we tested out this concept in making Hot air balloons. Hot air is less dense or lighter so it will rise. That was the theory.

 

Our Special Visitors

Last week we had some special guests visit thanks to Kim from Roaming Reptiles. We had a tank of Green Tree frogs and a tank of tadpoles that were in various stages of morphing. This fitted perfectly in with the 1/2 theme of Life Cycles and because an event like this happens once every 4 years we let the 3/4’s and Preps in on it too! It’s led to some great follow-up discussions in the classroom.

The 5/6’s helped show the adult frogs to the younger students so the frogs weren’t overly handled. They could pat them but only with damp fingers.

Thank you Kim!

Wildlife Rescue Visit – 2/3/4’s

Janet came to tell us about the work she does with injured and sick native animals. People who find them bring bring them to her to look after. Sometimes she needs to take them to a vet first.

The worst thing for our birds and native animals like ringtail possums and sugar gliders is cats. Also finding a tree to nest in. Human rubbish like fishing line and cotton is also really bad for birds. They can get caught in it and even use it for their nests which the new baby chicks can get caught in.

Welcome to the Hemit Crabs

Ky and Zarlia have bought in their pet hermit crabs so we could keep them as pets here. We enjoyed looking at them and picking them up and finding out about how to look after them. We hope we look after them at least as well as they did. Thank you!

Grade 3/4’s Erosion Activity

After learning about what erosion means and what causes coastal erosion we built our own sand wall and tried to protect it from erosion by supporting it with ‘plant roots’ (gutter guard), mini sandbags (using teabags) and sticks and leaves. We then had to test it with ‘waves’ (syringes filled with water). We were surprised by how well the sandbags protected the wall, particularly if they were packed together.


Grade 1/2 – Harvesting

When we walked around the garden the first time it was just to look. The corn had grown very tall and there were lots of tomatoes and baby butternut pumpkins. The second time we walked around we were allowed to pick any tomatoes that were orange or red, not green. There was a container full. We had to pick them very carefully. There weren’t many corn left as it was the end of the season so we picked what was left. Then we cooked the corn and had a try of the tomatoes. Most people thought the corn was delicious.

Grade Ones – Harvesting

When we looked around the vegi garden we found corn  and lots of tomatoes. There were baby buttrnut pumkins and some funny looking zuccinis. We ate some corn and tried some tomatoes if we wanted to. The corn was most people’s favourite.

3/4’s Volcanoes

After learning about the core of the earth and the layers making up the inside of the earth we moved on to tectonic plates and how the bubbling magma can make them move. Well the natural progression of  this impact on the earth’s surface ends with earthquakes, tsunami’s and volcanoes!

We had to make a volcano and create a volcanic eruption. Here’s the final, exciting culmination of this activity!