Thursday, March 25, 2010
Monday, March 22, 2010
Experiment of 400 cigarettes... No wonder why humans get lung cancer !!
Think about this...
* Sticky tar contains poison and remains in human's lungs each time they smoke *
* The lungs need much calorie to remove these poisons from the blood *
* Life can be shorter than we can think of *
Cardio Training Tips - Fartlek Training
What is Fartlek Training ?
Fartlek, a Swedish term that means "speed play," is a form of interval or speed training that can be effective in improving your speed and endurance.
Fartlek running involves varying your pace throughout your run, alternating between fast segments and slow jogs. Unlike traditional interval training that involves specific timed or measured segments, fartleks are more unstructured. Work-rest intervals can be based on how the body feels. With fartlek training, you can experiment with pace and endurance, and to experience changes of pace. Many runners, especially beginners, enjoy fartlek training because it involves speed work. But it is more flexible and not as demanding as traditional interval training. Another benefit of fartlek training is that it doesn't have to be done on a track and can be done on all types of terrains -- roads, trails, or even hills.
To do a fartlek workout, try introducing some short periods of slightly higher pace into your normal runs. Maintain the faster pace for a short distance or time intervals, such as 200m or 30 seconds. The intervals can vary throughout the workout, and you can even use landmarks such as streetlights or telephone poles to mark your segments.
Once you complete a fast segment, slow your pace to below your normal running pace, until you have fully recovered and your breathing has returned to normal. Then return to running at your normal pace, and incorporate more slightly fast intervals later in the run.
Fartlek training puts a little extra stress on your system, eventually leading to faster speeds and improving your anaerobic threshold.
Wednesday, March 17, 2010
How Big Is The Galaxy?
Here is a short video all about galaxies. Our Galaxy is named the Milky Way and it is such a big galaxy that we cannot measure it in miles or kilometers, as the numbers would be mind boggling. So here is a short guide to galaxies, which come in many shapes and sizes and contain billions of stars.
All the stars in the universe are not scattered around randomly but instead are grouped together in clusters called Galaxies.
Galaxies come in many shapes and sizes and contain billions of stars. It is said that there are more stars in the universe than there are grains of sand on every beach in the world.
Our Solar system of the Sun and planets live in a galaxy very similar to this one. We are placed about three quarters of the way out from the center of our Galaxy.
We call our galaxy the Milky Way. On a very dark night the Milky Way can be seen stretching across the sky.
So, how big is it?
It is so big that we cannot measure it in miles or kilometers, the numbers would be mind boggling. Instead we must use another measurement called a light year.
What is a light year?
If you switch a light on, the light leaves its source and arrives at your eyes instantaneously.
Now if you stood 186 thousand miles away or about 2 thirds the distance to the Moon and the light was switched on it would take 1 second for the light to reach you.
Are you good at Mathematics?
Right, well multiply 186 thousand by 60 seconds. That comes to 11 million miles. If you stood this far away it would now take 1 minute for the light to reach you.
Multiply this by 60 minutes and it would now take 1 hour for the light to reach you. Multiply this by 24 hours and it now takes 1 whole day to reach you. Over 160 Billion miles.
Now the hard bit, multiply this number by 365, the number of days in a year and this massive number is, 1 light year.
Our Galaxy is 100 thousand light years across. A ridiculous number to try to understand.
Let's put it another way if you travelled at 186 thousand miles per second it would take you 100 thousand years to get from one edge to the other.
Okay, still too big a number. Let's try and make it more understandable.
If the Sun was a ball 1 meter across then the Earth would be a garden pea over 100 meters away. And Pluto would be a grain of rice 4 km or one light day from the Sun.
On this scale, the nearest star Alpha Centuri which is 4 light years away or 26 Trillion miles would be on the Moon.
There are only seven stars less than 10 light years from Earth.
The nearest Galaxy to ours is called the Andromeda galaxy it is an incredible 2.2 million light years away. That means we are seeing it as it was 2.2 million years ago.
COOL HUH ? Why don't u give some comments below...
Monday, March 15, 2010
Oh, jangan lupa dapatkan kebenaran dan pengawasan daripada orang yang lebih dewasa sekiranya berminat melakukan kerja kraf di atas ya !!
Selamat Mencuba !! = D
How do plants help us breathe?
Actually plants don't help us breathe in the actual breathing process, but plants will take in carbon dioxide, and they'll produce oxygen. Well our bodies, when we're breathing, we take in oxygen and we produce carbon dioxide, so plants and animals are a perfect fit, because we give off the carbon dioxide, and plants need the carbon dioxide, and they give off the oxygen, and we need to oxygen. So plants are necessary for us to breath.
What is "photosynthesis"?
Photosynthesis is the process where plants actually make food. They will take in the carbon dioxide that we try to get rid of. They'll take in water and they need energy, and the energy comes from the sun. So actually they need water. They need sunlight and they need carbon dioxide and they turn that into food, which is sugar and in the process of making that, during photosynthesis, the plants give off oxygen which we need.
Why do some leaves change color in the fall?
Leaves will change color in the fall because they have a lot of pigments in them. Most plants are green, but in the fall, the mechanism for feeding the plant is cut off. And when this happens, the chlorophyll disappears, and then the other pigments that are underneath the chlorophyll begin to show through, so you'll see your reds, yellows, browns, and then the green fades away. The leaves don't then get green again, because when they turn brown, the leaves will drop off. Then in the spring, the new leaves will grow back, and since they're growing back and they're being nourished by the roots of the plant, they'll start producing more chlorophyll which they need to make food, to keep the plants alive.
How do seeds grow into plants?
Inside every little seed there is a tiny plant. Before a plant produces a seed or releases the seed, it provides a storage place for food for that plant to grow. When that seed falls off, it has stored food and has a little seed in it with a protective coat, so that if conditions aren't right, they won't grow. But the protective coat will keep the seed viable. Then, when the seed gets into an area where it can grow, the nourishment is released from the stored food. Because of the moisture that's getting in there, the little plant that's in there starts growing and turns into a new plant.
How do plants drink water?
Plants will drink water through capillary action. If you take two pieces of glass and stand them up next to each other and then set them down into water...once you put them together, the water will just rise up in between them. That's basically how capillary action works. Some plants have water conducting tissue called zylum in the middle of the plant that carries water up. There are also tubes in the plant that are called floam, which carry food around the plant.
Are there plants that eat bugs?
There are some plants that are carniverous. Some plants have a very putrid smell, and they'll attract insects. Some of them trap the insects by having them get stuck in a fluid. Some of them actually close like the Venus Flytrap; it has hairs in there which trigger the plant, and causes it to close over the fly or mosquito or whatever bug happens to get in there. They use that protein to survive. A lot of those plants live in an area such a bog where there isn't much in the way of nitrogen. So, eating bugs is their source of nitrogen, too.
How old is the world's oldest tree and how do we know?
The oldest tree in the world is a bristle cone pine tree, and it's found in California. It's 4,600 years old. Trees can have their age determined by counting their rings. Now, there's an annual growth ring around the outside of the tree, and every year that ring produces another ring. And so if you just go back and count the rings, and you can do that either by cutting the tree down, which is not recommended, or you can take a core sample, which pulls out the rings from the center of the tree. This technique will also actually tell you the weather of certain years, because in the years where there's a lot of moisture, a lot of rainfall, the ring will be much bigger. And in the drier years, the ring is smaller. So you can not only tell the age of the tree, but also past climatic events.
Why does fruit ripen?
Fruit will ripen because there are some chemicals inside the fruit itself called catalysts. And these catalysts will cause the starch that is in there, inside the fruit, which is basically stored food for future plants. But that will be turned from starch into sugar, and that's basically the ripening process behind the fruit. As starch changes to sugar, it goes from a kind of a bland taste to a sugary sweet taste. And you can even experience this if you take a cracker, which is basically starch, put it in your mouth, and just chew it until you can't anymore. You will notice that over time the cracker begins to taste sweet.This is because the enzymes in your mouth are actually taking the starch in the cracker and changing it into sugar.
Are tomatoes fruits or vegetables?
Are tomatoes fruits or vegetables? Man, that's a question that comes up so often. Some people look at a tomato and they say, “That's a vegetable.” And some people say, “No, that's a fruit.” Well, basically, if you look at the biology end of this that a tomato is a fruit because a fruit is actually the organ of the plant that is involved in reproduction and the tomato produces the seeds so it is a fruit. A watermelon is a fruit but we call them a vegetable. So we are getting mixed up between the grocers' definition of fruits and vegetables and the scientists' definition of fruits and vegetables.
Cuba klik link di bawah.. Terdapat pelbagai eksperimen yang boleh pelajar-pelajar terokai dan lakukan sendiri. Antaranya seperti Catch The Wave, DNA Detective, Great Balls Of Goop, Loony Balloons, Mummy Magic, Mysterious Melodies dan baaaaannyaaak lagi..
Selamat Mencuba !