What do you think of when you hear the word AFRICA?
Do you think of safaris? And villages?
You might think of drums and dancing. Or do you think of something else?
These are stereotypes of Africa, which means they are a conventional, over-simplified image or impression of the country.
When I was in Year 9, my school ran a mock general election, so we could learn how an election works. I was chosen to be the Liberal Democrat candidate, and two other students were chosen to represent the Conservative Party and the Labour Party. We didn’t have any other parties at that time!
We had to pretend we were running to be elected as a Member of Parliament (MP), and the other students in the school were the voters. We created posters and learned what each party stood for, so we could debate in front of the whole school and give our speeches. We spoke to students in the hallway, and each of us had a team of other students to help us out. This is exactly what all the candidates for MP in your local area will be doing. More or less!
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.
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.
Anything that is related to a sun is commonly described as being solar. Our sun is a typical medium-sized yellow star which is about 5 billion years old. Its surface temperature is about 5,500°C, but even that isn’t as hot as its superheated centre. Some parts of the sun’s surface are cooler, with a temperature of between 2,700–4,200°C, and these appear darker when viewed through specialised telescopes. These cooler patches are caused by fluctuations in the sun’s magnetism and are called sun spots.
