Johannes Kepler

Austrian mathematician and astronomer who got himself taken on as an assistant to Brahe in order to get access to his planetary tables. Kepler had been trained as a Platonist and Neopythagorean, and was given to rather mystical views, as exemplified in his work Mysterium Cosmographicum. Nevertheless, Kepler was also a confirmed Copernican. In fact, he wanted to use Tycho's data to prove the validity of the Copernican theory. He analyzed the vast amount of data upon Brahe's death. From this data, he prepared new planetary tables (called the Rudolphine Tables). At first, he determined the shape of planetary orbits to be ovoid, but rejected this result for aesthetic reasons. Going back over his calculations, he found and corrected an error. The new shape turned out to be an eclipse, which fit well into Kepler's Phytagoras views on nature.

Muscular System

A popular and traditional Halloween costume is that of a skeleton. Could a skeleton really walk by itself? What do you think? In the bone section of KidsBiology.com we learn that skeletons have the important job of providing our bodies with strength and form. The task of moving our bodies from one place to another belongs to another part of our bodies known as muscles. Without muscles we could not move.

H2O

Everyday we see the same whose name the water, what water ?

Water (H2O) is the most abundant compound on Earth's surface, constituting about 70% of the planet's surface. In nature it exists in liquid, solid, and gaseous states. It is in dynamic equilibrium between the liquid and gas states at standart temperature and pressure. At room temperature, it is a nearly colorless with a hint of blue, tasteless and odorless liquid. Many substances dissolve in water and it is commonly referred to as the universal solvent. Because of this, water in nature and in use is rarely pure and some of its properties may vary slightly from those of the pure substance. However, there are many compounds that are essentially, if not completely, insoluble in water. Water is the only common substance found naturally in all three common states of matter and it is essential for life on Earth. Water usually makes up 55% to 78% of the human body.

pH meter

Lacking a pH meter, water is pH-tested by adding chemical agents to a water sample. Depending on the agents used, a bright yellow result could indicate highly acidic water; blue, neutral; and deep brown, alkaline water. Hues are interpreted as positions along the scale.
Liquid pH tests can be messy and they do require some guesswork as to the reading. Conversely, a pH meter is a digital device with a connected glass electrode probe. The probe is placed into the water to be tested, and the pH of the water is digitally displayed. It takes mere seconds and is far more accurate, assuming the pH meter has been properly calibrated.

Bird Beaks

Know ye not that there are many types of bird's beak that every day we see, this is some pictures of bird's beak in the world, one of which is my pet bird at home, where behold guess who?

Tuatara

About Tuatara

This animal has a spiky crest running down its back. They look like lizards, but they have differently shaped backbones and skulls. Their teeth are also permanently attached to their jaws. They were once very common in New Zealand but they are one of the rarest animals ion the world.

they are nocturnal, hunting at night for bird eggs and small insects. 


Animal Facts

What is this animal's name?	Tuatara
What class is this animal assigned to?	Reptiles
What does this animal eat?	Bird eggs and insects
Where did this animal live?	New Zealand

Tazmania

About Tasmanian Devil
The Tasmanian devil hunt slow moving animals such as insects and snakes, they also feed on dead animals. They will eat whole carcasses including feathers and fur

Animal facts

What is this animal's name?	Tasmanian Devil
What class is this animal assigned to?	mammals
What does this animal eat?	Insects, snakes, and dead animals
Where did this animal live?	Tasmania, Tropical western Africa

Alpine Skipper

My first task tomorrow is to collect butterflies

About Alpine Skipper

The Alpine Skipper is found throughout the Indo-Australian region. This includes New Zealand, Australia and southern Asia. In the early stages, the caterpillar is greenish-gray striped. It feeds on sedge which is a grass-like plant that grows in wet places. The butterfly is dark brown on the top side of the wings with yellow-orange spots. The underside of the wings are mainly yellow with a brown spotted pattern which provides camouflage when the butterfly is feeding from yellow plants.

Carolus Linnaeus

Carolus Linnaeus, 1707-1778, is a Swedish physician. He had interest in studying plants. He observed and noted the characteristics of different types of plants he found. Based on the similarities and differences in the plants, he made classification. Linnaeus published Species Plantarum in the dsitinguished Systema Naturae that includes organism classification. Because of this works, he is known as the founding father of classification (taxonomy)

Symbols in Laboratory

Pelajaran yang saya peroleh hari ini adalah tentang simbol-simbol yang sering kita jumpai di ruang laboratorium, kemanan tu penting yang nggak friend....Nah agar saat kita berada di ruang laboratorium nggak celulak celuluk (kaya kebo getu) ada baiknya teman2 tau apa makna dari lambang2 tersebut, wokey....

radioactive

yang ini simbol bahaya radioaktif, kayak uranium getu....

flammable

yang ini namanya flammable artinya mudah terbakar

                                       

kalo yang ini kita semua nggak boleh melakukannya, baik sekedar mencoba atau buat gagah2an....ruang lab bisa pengap....hehehehe...yang ini nggak cuma di lab, di pom bensin dan ruang pak kepsek juga ada kok...

Rachel Carson

After the World War II, many types of new insecticides came to the market, including DDT, which is worshipped as the main weapon in the war to combat pest and to increase harvests. Nobody considered the effect that insecticides may cause, which cannot be decompossed naturall by the soil and other organisms. In 1962, a book written by an American marine biologist, Rachel Carson (1907-1964), entitled Silent Spring attracted many people on the destructions caused by these chemicals. In her book, Carson presented an evidence that insecticides do not kill the pest only. The secondary consumers predate insect that are infected by the chemical sprays and therefore this accumulates pesticides in the bodies of the secondary consumers. The chemicals accumulate more in every increasing rank of thropic pyramid so the danger seriously threats the organism in the top of food web, including human beings. Carson wants that not only time will come when the song of birds are not heard anymore to welcome the spring, but the human beings have also threatened their own exixtence.

Hazardous Chemical Substances

Hazardous chemical substances include

• Poisonous Chemicals

 For example : alcohol, metahnol, carbon monoxida and chloride acid

• Explosive Chemicals

For example : strong acid (chloride acid and concentrated sulfate acid) must be poured into Erlenmeyer containing water slowly using a rod stirrer

• Coorosive and Irritative Chemicals

Corrosive substances stimulate rust on metals. Irritative substance causes irritation on exposed body tissue. Example of  corrosive and irrittative chemical include sulfate acid, chloride acid, nitrate acid and formaldehyde

• Vaporable and Flammable Chemicals

For example : alcohol, methanol, eter and acetone

• Carcinogenic Chemicals

Carcinogenic Chemical are chemical substances that promote the development of cancer cells. For example, food coloring or a lipstick that contains rodamine B, benzene, nitrosophenol or cigarette smoke.

• Radioactive Chemicals

Radioactive chemicals are often used in medicine, agriculture and also BATAN (National Atomic Energy Agency). For  example : X-ray, laser and uranium.

Thermometers

A thermometer is an instrument to measure temperature. A thermometer contains either hydrargyrum or alcohol that function to indicate the low or high level of temperature. A thermometer has different types depending on the purpose of its use. For instance, maximum-minimum thermometer is used to measure air temperature, laboratory thermometer is used in laboratory research and clinical thermometer is used to measure body temperature.

Antonie Van Leeuweenhoek

Born in Delft, Holland by the end of XVII century could succesfully invent a simple microscope following his dilligent and careful works. He could see tiny  weird thing in a drop of water that he took from container of soaked straw under his microscope. Leeuwenhook is popularly known as the father of microbiologi.