Baby Fat and Heart disease
An alarming new research announces that baby fat could be dangerous later in life. Scientists studied BMI or body mass index of hundreds of children between two or six years of age. There BMI was measured regularly during those years and it was continued to be measured once a year between 11 and 18 years of age. The same children, now young adults were monitored between 18 and 28 years of age. The clear connection between baby fat and later developed heart disease, high blood pressure and high of fat in the blood, even diabetes. Since child obesity is almost a epidemic in rich countries there is a serious concern about the health of the future adults in these countries. Scientists are now trying to educate pediatricians about the problem so the problem could be recognized by teachers and parents in order to educate people and hopefully prevent child obesity and the heart condition repeated to it.
Science news
Wednesday, November 24, 2010
Friday, November 19, 2010
Reflection on the Water and Food Color Expiriment
Today’s Water Experiment
Today in science class we have tested when we added food color to the tree cups of water it dissolved. But in ordinary time periods, the coldest water which was on -20 C it dissolved the slowest and while dissolving the food color just dropped on the bottom of the cup. In the room temperature water which was 23 C it dissolved faster then the cold water and it spread in all the water quickly but not quick as it it did in the hot water. In hot water it dissolved the fastest and spread in whole water very quickly because it is less dense.
Today in science class we have tested when we added food color to the tree cups of water it dissolved. But in ordinary time periods, the coldest water which was on -20 C it dissolved the slowest and while dissolving the food color just dropped on the bottom of the cup. In the room temperature water which was 23 C it dissolved faster then the cold water and it spread in all the water quickly but not quick as it it did in the hot water. In hot water it dissolved the fastest and spread in whole water very quickly because it is less dense.
Monday, November 15, 2010
Cats are Delicate Indeed
Have you ever observed dogs and cats drinking water? Surely you have noticed a difference in their styles. Dogs drink water in a noisy, sloppy way usually spilling the water around the bowl. Cats drink water almost silently without spilling it. This is not the only difference, scientists found that cat’s and dog’s technique is also quite different although both cats and dogs actually lap water with their tongues instead of drinking it directly as we do.
Scientists discovered that cat’s actually suck up water with the tip of there tongue, which is possible thank to the high flexibility of the cats tongues which they also use for grooming. When drinking cats curve there tongue backward so that the top surface lightly touches the water. Then the cat move its tongue very quickly which forces the water to form a liquid column. Then the cat closes its jaw to capture the water and swallow it. The forces that allow this process are gravity and inertia. It seems that cats new a scientific way of drinking water. Also scientist measures that cats move their tongues very quickly almost one meter per second, but the larger cat the slower it laps
Have you ever observed dogs and cats drinking water? Surely you have noticed a difference in their styles. Dogs drink water in a noisy, sloppy way usually spilling the water around the bowl. Cats drink water almost silently without spilling it. This is not the only difference, scientists found that cat’s and dog’s technique is also quite different although both cats and dogs actually lap water with their tongues instead of drinking it directly as we do.
Scientists discovered that cat’s actually suck up water with the tip of there tongue, which is possible thank to the high flexibility of the cats tongues which they also use for grooming. When drinking cats curve there tongue backward so that the top surface lightly touches the water. Then the cat move its tongue very quickly which forces the water to form a liquid column. Then the cat closes its jaw to capture the water and swallow it. The forces that allow this process are gravity and inertia. It seems that cats new a scientific way of drinking water. Also scientist measures that cats move their tongues very quickly almost one meter per second, but the larger cat the slower it laps
The News from the Past
Scientists previously believed that early humans made stone tools no more than 20,000 years ago. However, new findings from Blombos Cave in southern Africa show that the stone-tool making method, called pressure flaking was invented as early as 75,000 years ago. That means that our ancestors were already in possession of tool making skills when they left Africa around 6,000 years ago. Pressure flaking was actually done by using a sharpen bone hard enough to remove tiny pieces of rock and it was so easy to learn that scientists it required only 30 minutes to be explained. It was used to sharpen the edges of an already finished tool. However, this finding is important because it proves that tool making skills were developed gradually over a long period of time. Blombos Cave also offered other artifacts such as decorated ostrich egg shells showing that early humans made items used for rituals as early as 75,000 years ago.
Scientists previously believed that early humans made stone tools no more than 20,000 years ago. However, new findings from Blombos Cave in southern Africa show that the stone-tool making method, called pressure flaking was invented as early as 75,000 years ago. That means that our ancestors were already in possession of tool making skills when they left Africa around 6,000 years ago. Pressure flaking was actually done by using a sharpen bone hard enough to remove tiny pieces of rock and it was so easy to learn that scientists it required only 30 minutes to be explained. It was used to sharpen the edges of an already finished tool. However, this finding is important because it proves that tool making skills were developed gradually over a long period of time. Blombos Cave also offered other artifacts such as decorated ostrich egg shells showing that early humans made items used for rituals as early as 75,000 years ago.
Wednesday, November 10, 2010
Monkey Business
Monkey Business
Scientists who were observing vervet and mangabeys monkeys came to an interesting discovery: monkeys, as humans, like to cuddle other monkey’s babies, just as we like to cuddle other people’s babies. But unlike human, monkeys have to pay a price if they want to cuddle somebody else’s baby. Of course, they have to pay to baby’s mother, and the currency is grooming. If a monkey is of a higher rank, grooming of the mother lasts shorter; if the monkey is of the lower rank, grooming has to last longer. Also, if only one or a very few mothers have babies, the other monkeys who want to cuddle their babies have to groom the mothers for the longer period of time. On the other hand, if there are lots of babies, those monkeys who do not have their own, do not have to groom the mothers for too long in order to cuddle their babies. The real market indeed
Scientists who were observing vervet and mangabeys monkeys came to an interesting discovery: monkeys, as humans, like to cuddle other monkey’s babies, just as we like to cuddle other people’s babies. But unlike human, monkeys have to pay a price if they want to cuddle somebody else’s baby. Of course, they have to pay to baby’s mother, and the currency is grooming. If a monkey is of a higher rank, grooming of the mother lasts shorter; if the monkey is of the lower rank, grooming has to last longer. Also, if only one or a very few mothers have babies, the other monkeys who want to cuddle their babies have to groom the mothers for the longer period of time. On the other hand, if there are lots of babies, those monkeys who do not have their own, do not have to groom the mothers for too long in order to cuddle their babies. The real market indeed
Monday, November 8, 2010
Reflection on Corn Starch and Water Lab
Today in science class, my class and I made a lab experiment on corn starch and water. I was in a group with Mateja and Stefan. First of all we got a plastic tray and we poured corn starch in it, and mixed with it water. When we touched it, it was very gooey and awkward. When you try to hit it, it is very hard and stiff but when you touch it gently, it just turns in to bare liquid. It was fun, but the smell of it was not very nice. I would like to know why did this mixture behave like this.
6b made a huge mess in the science classroom [it is always a mess after a lab] but 6b cleaned everything so the classroom was spotless. This was one of my favorite science classes and I think that the majority in 6b were of the same opinion.
Today in science class, my class and I made a lab experiment on corn starch and water. I was in a group with Mateja and Stefan. First of all we got a plastic tray and we poured corn starch in it, and mixed with it water. When we touched it, it was very gooey and awkward. When you try to hit it, it is very hard and stiff but when you touch it gently, it just turns in to bare liquid. It was fun, but the smell of it was not very nice. I would like to know why did this mixture behave like this.
6b made a huge mess in the science classroom [it is always a mess after a lab] but 6b cleaned everything so the classroom was spotless. This was one of my favorite science classes and I think that the majority in 6b were of the same opinion.
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