Science

 

 

Antibiotics useful of human body?

                                       

                                                              

Antibiotics inhibit the growth of bacteria, fungus vand parasites. In the beginning, the antibiotics were isolated from living organisms. For example, penicillin was isolated from the fungus penicillium and streptomycin from the bacteria Streptomyces. The more modern antibiotics are being chemically synthesised. There are few or no side effects from antibiotcs and at the same time they are highly effective. The antibiotics to be used a particular infection depends on three factors: the location of the infection in the body, the ability of the antibiotic to reach the site of infection and its effectiveness in overcoming the infection. An antibiotic can cure the infection in two ways. It can directly destroy the bacteria causing the infection or it can prevent the bacteria from multiplying further. The antibiotics can be administered topically, orally or intravenously. They are administered topically in the case of eye or skin infections. In case of a serve infection the antibiotics are administered intravenously.

 

 

 

 

 

FACT

 FACT

Why are tides formed?

Tides are caused due to the gravitational pull of the moon on the water in the oceans and seas. These occur at periodic intervals of times. The pull of the moon causes a huge swell of water to rise. This is known as a high tide. As the effect of the moon wanes, the water recedes and a low tide occurs. As the Earth spins on its axis, different oceans come under the effect of the gravitational pull of the Moon at different times. Thus, the high and night in the seas and oceans. Tides are of two different types- the spring tides and the neap tides. Spring tide occurs on new or full moon day when the oceans experience the combined gravitational pull of the sun and the moon. The high tides arte expectedly high tides are exceptionally high and low tides Sun and Moon are at right angles to each other, i.e., on quarter moon days.

ENGLISH

ENGLISH

Some general question

1.  The slump in business made Mr. Sharma Bankrupt.

 

a) Rise

 

b) Disease

 

c)  Fall

 

d) Theft

 

Answer: c)

2.  She is a contemplative person.

 

a) Manipulative

 

b) Shallow

 

c)  Careless

 

d) Thoughtful

 

Answer: d)

3.  All the characters in the movie are fictitious.

 

a) Bogus

 

b) Misleading

 

c)  Imaginary

 

d) Real

 

Answer: c)

4. They hope to emulate the success of other blue-chip companies.

 

a) Neglect

 

b) Instigate

 

c)  Modify

 

d) Imitate

 

Answer: d)

5. He confessed his feelings for me.

 

a) Addressed

 

b) Suppressed

 

c)  Stressed

 

d) Disclosed

 

Answer: b)

6. There was a marginal increase in the revenues of the company.

 

a) Minor

 

b) Significant

 

c)  Negligible

 

d) Unforeseen

 

Answer: b)

7. Tolerance is essential for peace and harmony.

 

a) Bigotry

 

b) Resilience

 

c)  Endurance

 

d) Indifference

 

Answer: a)

`SCIENCE

 

`SCIENCE

Health of the uterus important                                                                                                             

The reproductive system helps in the process of reproduction. The female eproductive organs are located in the pelvic region. It includes the ovaries, fallopian tubes, uterus and the vagina. Ovaries are the female sex glands that release the eggs into the fallopian tubes. The two fallopian tubes connect the ovaries with the uterus. These are 10 to 12 cm long and the fertilization of the egg take place in them. This fertilised egg is then passed into the uterus where it attaches itself to the uterine wall. The uterus is a pear-shaped organ in which the embryo and the foetus develop. The uterus can expand to 24 times its normal size. It also has the provision for the nourishment and safety of the developing embryo and foetus.

HAPPY TEACHER'S DAY

 TODAY IS BIG DAY 

HAPPY TEACHER'S DAY 

5TH SEPTEMBER ,

ALL MY DEAR WORLD TEACHERS.

 The birth date of the second President of India, Sarvepalli Radhakrishnan.(5 September 1888)

                                            

 celebrated as Teacher's Day since 1962 National Teachers' Day Teachers' Day is a special day for the appreciation of teachers.

FACT SCIENCE

 

            FACT SCIENCE

    Why does the filament in the bulb glow?     

                               

The electric bulb is a glass bulb fitted with a filament that glows when heated by electricity. Thomas Alva Edison invented the light bulb. The light bulb consists of a glass bulb. It is fitted with a filament made of tungsten. The filament is heated to candescence by passing an electric current through it the glass bulb is filled with a noble gas that prevent the filament from melting and  then evaporating. Many attempts were made to make a bulb before Edison succeeded. The lifespan of the bulb was however approximately 40 hours. Edison conducted many experiments to extend the lifespan of the filament. He finally succeeded in December 1879.

Science

                Science

     Joint are important why?

                                   

Joints are located where two bones are joined together. They along with muscles together help the bones to move. The joints protect the bones from damaging each other while moving. The immovable joint, called sutures, hold the bones of our skull together. In movable joints, the ends of the bones that move over one another are covered with a cartilage. The cartilage helps the joints to move easily and protect the bones from sudden shocks. The hinge joint allows movement in only one direction. Knee, elbow and finger joints are hinge joints. The pivots and gliding joints is found between the skull and spine. It allows the head to move sideways, upwards and downwards. The ball and socket joint are found in the shoulder and the pelvis. The hands and legs can swing freely, while the rest of the body remains perfectly still.

Science

 

Science

Why is a compound different from a mixture?

                 

An element is a pure substance that cannot be purified further by chemical processes like heating, cooling   , electrolysis and reaction with the other chemicals .A sample of an element contains only one type of atom. A compound is a substance that is formed due to the chemical combination   of two or more different elements. A compound is represented by a formula. Compounds have a fixed   composition. The properties of a compound are different from its constituent elements. The element in a compound cannot be easily separated .on the other hand   , a mixture is a combination of two more elements or compounds. In mixtures, the elements or compounds are mixed physically. The substance in a mixture retain their own properties and they can be separated by physical processes .

SCIENCE

 

SCIENCE

Why do astronauts require special training?

An astronauts or a cosmonaut is a person who either pilots a spacecraft or acts as a crew member on it. These people have to be trained before they are sent on space missions. This is because they have to learn to control the flight simulator in the shuttle. They also have to deal with the weightlessness that they will encounter in space. They are also trained to act in various emergencies that they might encounter. The astronauts have to carry out repair work and check the support systems on the space stations. They also have to perform various scientific and medical experiments.        

 The astronauts have to learn to keep everything strapped and stowed in lockers provided in the spacecraft. They also have to exercise regulalarly to counter the effect of microgravity or weightlessness. The special training prepares them for all of this and more.