Popular, Science, Nature and Tech

Have you ever wondered…why leaves change colour in autumn?

Autumn is a season of change; the weather gets colder, there’s less daylight and leaves change colour and fall from plants. But why does this happen?

Why Do Plants Have Leaves?

Leaves contain a chemical called chlorophyll (pronounced KLO-ro-fil), which as well as giving them their lovely green colour also helps create food for the plant. The leaves act like tiny solar panels, and use the sun’s energy to convert water (from the ground) and a gas called carbon dioxide (from the air) into sugar and oxygen. This process is called photosynthesis (pronounced foto-SIN-theh-sis), and the sugar is what the plant lives on.

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Toys and Games

What is Geocaching?

 

What is Geocaching?  It’s like a real-life treasure hunt and is a great way to make a walk in the woods just a bit more interesting!

Julianne Robertson explains what it is and how to do it. 

 

What is it?

Players use a handheld GPS device or a smartphone to look for a set of co-ordinates near to wherever they are and find the geocache (or treasure!) hidden at that location.  These are usually a small container of some kind with a logbook and ‘treasure’ inside – this can be anything, like a little toy, some stickers, a badge, a pretty stone – basically anything small enough to fit inside and be worth finding!

 

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Sounds good!  How do I get started?

Go to the website www.geocaching.com and register – it’s free to sign up.  Then you put in your postcode and you should see a list of all the geocaches near to where you live.  Choose one and you’ll get the co-ordinates you need to put into the GPS, as well as a description of the area and clues about how to find the cache.

 

Are geocaches always hidden in the woods?

No – there are geocaches all over the world and they are usually put in places which are important to the person hiding them.  Some are hidden in forest areas, others are in local parks, or city streets – even underwater!  There are also different sizes of geocache and a range of difficulty – you should probably start with one that’s easy, at least to begin with!

 

What do I do when I find one – can I keep the treasure?!

Yes, but you should replace anything you keep with something of equal or greater value.  You should also write about your find in the logbook and when you get home log your experience on the website too, so that others know the cache is still active.

 

 

 

Can I hide my own cache for others to find?

Yes, once you’ve found a few caches you’ll know what makes a good geocache and hiding place, and you might want to create your own!  There are lots of guidelines on the website about how to do it.

 

Now you know about geocaching – go and try it!  It’s a great activity to do with your family or a group of friends.  Once you’ve found one, you’ll want to find more!

 

 

 

Julianne Robertson is a freelance journalist, based in Dundee. Her background is radio news, and she now writes features and reviews, specialising in parenting, faith and religion, events and lifestyle issues.

 

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Science, Nature and Tech

Why do we get Hiccups?

why do we get hiccups

Everybody gets hiccups (also sometimes spelt ‘hiccoughs’). Even when babies are still in the womb they hiccup, which can feel very odd to their mother! But why do we get them and how can you stop them?

What are Hiccups?

Hiccups are caused by the diaphragm (pronounced DYE-uh-fram). This is a large, dome-shaped muscle that sits at the bottom of your chest cavity, below your lungs. When we breathe in the diaphragm tightens, helping to pull air into the lungs, and when it relaxes it forces the air back out again. Sometimes the diaphragm becomes irritated and instead of tightening smoothly it does it in a jerky way, which makes air suddenly rush into your throat. This air is stopped when it hits the voice box and makes the opening between the vocal cords close very suddenly. This is what produces the sound of the hiccup.

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