Science, Nature and Tech

Fact or Fable? Most body heat is lost through the head

Many people believe that you should keep your head covered during cold weather, as most body heat is lost through the head. It’s certainly true that any part of your body that’s exposed to cooler air will lose warmth; heat always moves from something warm to something cooler (that’s called the second law of thermodynamics). And our heads and faces are more sensitive to changes in temperature than other parts of the body.

Read More...

Travel

Adventure in Uganda

On my second day in Uganda, we went white water rafting on the Nile, near a town called Jinja. The rapids are just Screenshot 2013-10-14 at 10.50.13down river from Lake Victoria, which is where the Nile starts.

The rapids are caused by the force of the water as it crashes over rocks and around islands in the river. There used to be more rapids there, and the famous Bujugali Falls. However, a couple of years ago a dam was built across the river, which has made part of it more like a lake and has increased the water levels, wiping out lots of the rapids, including Bujugali. However, below the dam, the rapids are still just as scary! The rapids are a favourite for rafters and kayakers all over the world. 

The rapids are caused by the force of the water as it crashes over rocks and around islands in the river. There used to be more rapids there, and the famous Bujugali Falls. However, a couple of years ago a dam was built across the river, which has made part of it more like a lake and has increased the water levels, wiping out lots of the rapids, including Bujugali. However, below the dam, the rapids are still just as scary! The rapids are a favourite for rafters and kayakers all over the world. 

Read More...

Home, Health & Style

What Makes a Family?

What does the word ‘family’ mean to you?  It can mean many things in our society. Some define family as a mother, a father and one or more children.  For others, there don’t need to be children in the home for there to be a family.  Where there are children, about three quarters of the parents will be married to each other.

In 2013 the Office of National Statistics, which is a government body which takes surveys on all manner of topics to help the government make policy (rules under which we all live), found that there were 18.2 million people living in this type of family.  Many more of us have families which have a different make-up.  For the purpose of the survey, a family is defined as people living in the same household.   

However, as many of you will know, there are other ways in which we describe our family.  There are children who have two parents of the same gender, there are children who have only one parent with whom they live, other children have guardians and live with aunts, uncles or grandparents. 

Read More...

Science, Nature and Tech

Green and Growing: The Life of a Seed

As you know, there is a vast number of different kinds of plants growing all over the world, from snowy slopes to Amazon rain forests to dusty deserts: plant life is everywhere. So how does it all work? Lets start with seeds.

 

 The Life of  a Seed

Picture a seed – I am sure you have all seen them. It will have a hard outer shell to protect it. When it has found the right conditions of warmth and moisture, this shell will crack or split as a root pushes its way out to take hold in the soil. Then the plant will start to grow and a shoot will make its way upwards, with the root growing down, to draw moisture from the ground and provide some balance for the plant, keeping it firm in its place.

Just like you and me, plants need food to grow. Their food is very different from ours, of course! Here’s what they do: the leaves draw water up from the roots, through the stem, and they also soak up sunlight and air. These three things combine to make food in the leaves, where it is stored. Now think of an onion. It is formed to store the food for the plant.

Read More...