What do you know about plants. I bet you know a lot. On this page you might be able to find out some more.
Where does our food come from?
Do you ever wonder what kind of journey the fruit and vegetables you eat every day have had? How do you think they get to the shops?
Are they grown on a farm near you?
You will be surprised just how far some of your favourite fruit and veg have travelled just to get to your local shops.
What is a plant?
So just what is a plant?
Well if you look in a dictionary you might see this definition:
a living thing that grows in earth, in water, or on other plants, usually has a stem, leaves, roots, and flowers, and produces seeds:
What is photosynthesis?
Where does our food come from?
Click here to go to the BBC website and find out.
Where do fruits and vegetables come from?
It's a big fancy word. It's how plants get energy.
They can do something that animals just cannot do. They can get energy directly from the sun. We just get sunburnt.
The process of water transportation is the way water moves through a plant.
The roots absorb water from the soil.
The stem transports water to the leaves.
Water evaporates from the leaves.
This evaporation causes more water to be sucked up the stem.
The water is sucked up the stem like water being sucked up through a straw.
Scientists carry out investigations to find things out and answer questions.
There are lots of different ways to find things out, such as fair tests, comparative tests, exploring and observing, finding patterns or sorting and classifying.
You are going to carry out an investigation to find out whether temperature affects how fast the stem sucks up water.
The best type of investigation to use for this is a comparative test, as you can compare what happens to plants in different temperatures.
Testing Water transportation for yourself.
Flowers (carnations work well for this)
Pots or small glass jars
First, put a small amount of water in each glass.
Next, add a small amount of food colouring to each glass
After that, put one flower in each glass ( to make it a fair test make sure all the the flowers are cut to the same length).
Finally, make a note of the time. You will need to leave the flowers alone now and come back to check later.
You could try a further experiements to see if tempreture affects the water transportation.
Set up the experiment in the same way, but place the flowers in different parts of the room.
Make sure you do a fair test and record your results.
Think you know everything there is to know about leaves? You may be surprised to learn the following facts:
Leaves require sunlight, water, chlorophyll and carbon dioxide to make food for themselves.
As winter approaches, leaves make a coating for themselves which blocks their water source; in the absence of water, the leaves no longer produce chlorophyll (chlorophyll is what makes leaves green).
When the leaves turn colours in the autumn, they actually are returning to their normal colors.
During the summer months, the chlorophyll present in the leaves causes the leaves to turn green, blocking the leaves' actual colours.
Along with chlorophyll, leaves contain two other chemicals that cause colouring. The first is called xanthophyll, which is yellow in color. The other is carotene, which is orange in color.
Red and purple leaves are actually caused by the presence of sugars from sap that is trapped inside of the leaves.
Once the leaves have turned brown, they are dead and no longer receive any nutrients.