Friday, 1 May 2015

More Crazy Fun Science!

So last week's Science Crazy we were looking at the lungs. 

It was great fun!  We made our own model lung, if you want to try it out at home visit my blog post: how to make a model lung...

(Click the image for the link to activity)



And we learnt about carbon dioxide and had fun with our self inflating balloons...

Thursday, 30 April 2015

SCIENCE: STEP BY STEP How To Make A Working Model Lung


LET'S MAKE A MODEL OF A LUNG!   We did this at Science Crazy last week and it was a huge hits with the parents and the kids!  It is such a simple but effective way of demonstrating how a lung works!





As you make your model I will talk you through the different parts of the lung.
 

For this project you will need:
  • Some plastic tubing – alternatively you can use straws
  • A clear empty 500ml bottle (make sure the bottle is a sturdy plastic)
  • 3 balloons
  • Modelling clay
  • Electrical tape (I found this worked best)
  • A craft knife or Stanley knife
  • Scissors


STEP ONE

First we need to cut the end off our water bottle. 

TIP: I like using a water bottle with quite a thick plastic as otherwise the balloon can crush it out of shape.

 
STEP TWO

Cut some plastic piping, you will need two pieces about 8cm long each.

These tubes represent the trachea (often known as your wind pipe).




In the body the trachea is one tube that splits into two, feeding air, from your mouth and nose, into the left and the right lungs. 

These tubes, the trachea, when it reaches the lungs, split into bronchi

Brochi is the plural of bronchus.

The bronchi then branch out into bronchioles, these branches then end at tiny sacs called alveoli, which is where the gas exchange takes place; this is where the oxygen (O2) is drawn into the blood and the carbon dioxide (CO2) is taken away.

 

STEP THREE

Put a balloon on the end of each piece of cut tubing with about 3-4cm of the tube tucked inside your balloon.  Seal the end of the balloon and attach it firmly to the tubing using some tape.

 

These are your lungs where all the bronchi, bronchioles and alveoli is contained.

 

STEP FOUR

Put your lungs with the attached trachea (the balloons fixed to the tubes) into your bottle, and hold in place with your modelling clay like this…



 STEP FIVE

Now you will need your third balloon.  What you want to do is tie a knot in your balloon, w ithout inflating it.  Now cut the top of the balloon off (I tried the base of the balloon in my very first attempt but it was much trickier and this way leaves you with a handle.  You will see what I mean when we have finished making our model of a lung.



STEP SIX

Stretch the balloon from STEP SIX over the bottom of your bottle where you made the cut and stick it down with some tape.  This is to represent your diaphragm.

 


The diaphragm, in the body, is a major muscle of respiration, it’s located below the lungs and is a large dome shaped muscle that contracts rhythmically (like your breathing pattern) and constantly (else if it stopped we would stop breathing and die!).  Most of the time it works involuntarily.

The reason we needed a bottle with quite thick plastic is because the balloon used in this step that represents our diaphragm needs to have not gaps round the edge and it’s important it doesn’t rip. If there are any hole or gaps, our lung model will not work.

IMPORTANT
MAKE SURE THERE ARE NO GAPS BETWEEN THE TUBES AND THE EDGE OF THE NECK OF THE BOTTLE, THIS IS IMPORTANT SO YOUR MODEL WILL WORK.

 
Your model is complete.  Now here’s how it works…

 
Pull the balloon at the bottom of the bottle, the balloon that represents the diaphragm.  When you do this you should, if you have ensured there are no gaps around the tubing or the diaphragm, see that the lungs, represented by the two balloons attached to the tubing, inflate.



Push the balloon up into the bottle, the lungs, the balloons in our case, will deflate. This is beause there is less room in the bottle because the diaphragm gets in the way, it's pushed the air out through the tubes like our diaphragm pushes air out of our lungs and back out through our air ways ( our nose and mouth).



This works for in the same way as our lungs in the body.  When we pull the diaphragm in our model, we are simulating what happens when the diaphragm in our body contracts.  When it does this, it makes room for more air that enters our lungs through our mouth and nose and down through the trachea, which is the tubing in our model.

A fun fact!

The lungs are known as the lights, this is because they are the lightest muscle in your body and it's where the term 'I'll knock your lights out' comes from!  How cool is that.  I got that fun fact from my local artisan butcher from Rose House, Ipswich.  Check him out here , his meat is amazing and he's so knowledgeable!  (I am not being paid to say this)

Sunday, 26 April 2015

What's inside the Earth?

I did this project last year with Honi, my 7 year old.  Today we did it again but this time Harmonie, my five year old, joined in and this time we got the atlas out too.  This is how we did our project today...
 
 

 
All you will need for this project is:

Thursday, 23 April 2015

Where do I get the time?

Where do you get the time? is a question I'm often asked and that I really don't know the answer to, but then again I am sat at my computer  in the early hours of the morning trying to write this post (knowing I will have to finish it off in the morning, which turned out to be the afternoon, when I get a free moment, when the girls are getting ready or busying themselves in some other productive way!)



Life is busy, but I believe all the hard work will pay off in the end.  You have to try.  How can I teach my kids to work for what they want in life, to fulfil their dreams if I am not at least trying to do the same.  Lead by example.  I think that's important.

At the moment my life is full of...

Friday, 17 April 2015

A bit of a drama...

What a week!

I keep meaning to write.  I have so much to tell you all but, at the moment, I am one super busy mama.  So much going on.  Mostly super exciting but it's making me so super busy while I'm at the start of setting up business.

So, this weeks highlights...


Sunday, 12 April 2015

Science Crazy Club begins!

Friday was my first ever Science Crazy Club.  I've done some science groups in the past but this was the first of my Science Crazy Club sessions and it was great fun!

I am running in 6 week blocks with a different theme each time. This time we are looking at the human body and the first session was all about DNA!


Thursday, 9 April 2015

How did you celebrate Easter?

For me I find Easter one of those seasons.  To me Easter is a Pagan festival, untrue to our beliefs. I'm not saying Christians who celebrate Easter are wrong, I'm just believe we should all follow what we believe is right - we all have our own path.   It's not like I completely avoid it.
 
Anyway, this is what we got up to...

Friday, 3 April 2015

Activities for Kids this Easter

Some fun Easter Activities to try with the children this Easter...


Easter Art Projects...



Make an Easter Bunny with a pinecone



Knit a chicken - these can be filled with mini chocolate eggs which adds to the fun as the chickens lay chocolate eggs!

Easter Maths projects...

Thursday, 2 April 2015

Get ready...

I am so busy preparing for my first Science Crazy Club!  I am so excited about what I have planned for all the children to do.  We've still been busy doing a whole lot of other things...



Harmonie wanted to do Science over the weekend.  She just loves science. Of course, I love that, science is never boring! 

She had fun making a model of a bone...

Monday, 30 March 2015

Science: colour explosion magic milk!

 


You've probably seen this experiment everywhere.  It's an old one but a good one and lots of fun for little people.
It involves an explosion of colour too which makes it fun for children but there is also a lot of important science in it too.
If you want to know how to do it yourself, you will need...
  • Whole milk
  • A dinner plate or bowl
  • food colouring a couple of colours is better we only had two in today (you will have to dilute the gel food colourings in a little bit of water to thin it out first though)
  • Pipettes (optional but adds to the fun)
  • washing up liquid

Now for the fun!

STEP ONE

First pour in the milk so it covers the plate (about 1cm deep).



There might be a few bubbles so let it settle so the surface is smooth.

STEP TWO

Now you get your pipette and squeeze a small amount gently on to the milk in the centre so it looks like this...


STEP THREE

Now for the really fun bit!

You need the washing up liquid in a small container.  With a clean pipette, drop a tiny bit of washing up liquid into the centre of your bowl.

Before you do this, remember to hypothesise about what you think will happen - you might want to do this in a science journal




Dip another cotton bud in to your washing up liquid and try again.

At this point you might like to talk about or note down (in your science journal) your observations.

What to do more?

If you want to carry on experimenting do what we done today: try it will semi-skimmed milk, try it will skimmed milk and then try it one more time in water.  Remember hypothesis first and observe the reaction. 

Which milk is better?  The one with higher or lower surface tension. 

Does it work in the water too or is it different?  Why do you think that is?

How does it work?


Milk is mostly water with about 5% to 10% protein and fat globules  (tiny droplets of fat suspended in solution know to scientists as Lipids)but it also contains calcium, vitamins, minerals, salt and carbohydrates.


The fats and proteins in the milk are sensitive to changes in the surrounding solution (the milk) as we learnt about in the curdling the milk experiment and making butter experiment we did a while back.


The beautiful bursting colours is caused due to the chemistry of that tiny drop of soap. Washing up liquid (our soap) has bipolar characteristics; soap is nonpolar on one end and polar on the other.   The soap's polar, or hydrophilic (water-loving), end dissolves in water, and the soaps non-polar end, its hydrophobic (water-hating) end, attaches to a fat globule in the milk. This is what weakens the chemical bonds that hold the proteins and fats in solution.  This is what alters the solution and causes the effect we can see!
What is making all the colours whirl and swirl and blend? Well it's the molecules of fat, the lipids.  They bend, roll, twist, and contort in all directions as the washing up liquid, the soap molecules try to join up with them. The soap molecules combine to form a micelle (a cluster of soap molecules). These micelles distribute the fat in the milk (push them about).
The food colouring is just being bumped about in the process giving us this effect, letting us see what normally isn't visible to the human eye.
You will notice, if you try dipping in more and more washing up liquid the reaction stops.  this is because the washing up liquid becomes evenly mixed with the milk, leaving no more lipids for the washing up liquid to chase. Or, to put it another way: when there are micelles and fat droplets everywhere the motion stops.  It makes for a great show though.
Of course there is one other reason the colours explode the way they do. Surface tension.  As I already said, milk is mostly water therefore has surface tension like water. The drops of food colouring floating on the surface tend to stay put (you do need to keep the liquid steady though).  The Liquid soap wrecks the surface tension by breaking the cohesive bonds between water molecules and allowing the colours to zing throughout the milk. 

To test this idea out try this experiment again but with water - it's not quite as dramatic but you will see what I mean.

Don't forget to finish your science journals (if you are using one) with a conclusion from what you have learnt! 


 

Thursday, 26 March 2015

A Rainbow! A Rainbow!

Monday the girls were all quite low. I had a migraine and so we did what we could manage.  For Chiara that was her workbooks.  She dived into them happily.




Honi finished her letter to her pen pal, and practised her 4 times tables.  She wanted to do French but after lunch she just lost that feeling.  Harmonie piped up with I like French and said Bonjour then waved hello to us all.  It was very cute.

Naomi mostly got stuck in to her maths and Harmonie found a fun science workbook.  She wanted to do pages and pages of it.  We got to a page about the sense of taste.  I had a fun idea...

Monday, 23 March 2015

Easter Bath Bombs!

The girls and I made some BATH BOMBS a few Valentine's ago. We had a go at some this week too.  But it gave me another idea. Another fun activity to do for Easter:  EASTER BATH BOMBS.


You can find the recipe and instructions by clicking on the above photo.  All you will need is:

Sunday, 22 March 2015

Loving the Freedom...

This week we have really enjoyed the freedom to flow.  We haven't always felt 100% but we have been having lots of fun...



The girls have been in a very arty mood this week.  Naomi is choosing to spend most of her time at the table sketching.

Tuesday morning, I came downstairs to the girls all sat at the table.  We are still working with our loose schedule.  Art wasn't on the menu for Naomi but she was compelled to draw and so she did. For hours...

Monday, 16 March 2015

Work, Play and a whole lot of fun...

Recently, we have been super busy, either staying in all day learning, cooking and playing (synonymous, I know) or being all about town shopping, appointments and the odd treat at the coffee shop.  


We have been finishing off our recent Ecology project looking for the next thing to sink out teeth into - so to speak.  I love doing Ecology with my eldest as she is animal mad and it covers all that and geography as well as science.

My twelve year old has also been conquering yet more algebra, she swears she hates it but she's a natural.  I love the way she teaches herself so much.  Sometimes I think I am there more as moral support.  

Harmonie, my four year old, has decided to write more and more this week... 

Wednesday, 11 March 2015

Science Crazy!

I have been so busy this week!  I have been working on some new hands on science projects with the girls and spent a lot of time setting up some new science groups.




So many ideas are going through my head right now and everything seems to be falling in to place.  I have even found a new venue, one that I am feeling very optimistic about.  I can't wait to reveal where it is!  

Anyway, for now...