Science Class 7th Notes
Download PDF File
PDF File Size 2MB
PDF File Screen Shots
Click Here to Download PDF File
Some Science Important Question
Spleen is called the graveyard of Red Blood Cells.
Oxgen Gas was discovered by Priestly.
Dr. James Waston discovered the structure of DNA in 1953.
Cell for the first time was discovered by Robert Hook.
“Debugging” is the process of locating and fixing or bypassing bug s (errors) in computer program code or the engineering of a hardware device.
„Claustrophobia” is defined as the fear of enclosed spaces.
“Brass” is an alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties.
“Bronze” is a metal alloy consisting primarily of copper, usually with tin as the main additive.
Vitamin C (also callead Ascorbic Acid) is a powerful antioxidant, and aids in the production of collagen, and stimulates the immune system. Vitamin C is essential for appetite.
“Soda Water” serves as a primary remedy for upset stomach.
Normal arterial blood pH is 7.40, with a range of about 7.36-7.44. Blood pH depends on carbon dioxide (CO2) concentration and bicarbonate (HCO3) concentration.
The main constituent of Sui Gas is Methane.
Agoraphobia is the fear of open or public places.
Cyberphobia is the fear of computers or working on a computer.
Chemically diamond is a Pure Carbon.
Earth revolves around the sun from? West to east
Philately is the science of stamp collection.
Hydrometer is used for specific gravity of liquid.
Which vitamin easily prepared in body? vitamin D
Which gas is commonly used in balloons? Helium
The most abundant element in earth curst is Oxygen (O) 46.6% and silican is the second abudent element of earth and silican is called earth maker.
One horse power is equal to 746 watt.
Which colour phosphorus used in matches? Red
Oldest known element? Copper
Which shape of carbon is used in lead pencils? Graphite
Artificial silk is called rayon.
Basic component of paper is wood.
The bar is a unit of pressure equal to 100 kilopascals and roughly equal to the atmospheric pressure on Earth at sea level.
Light year is the unit of distance.It is the distance that light can travel in one year. A light year is equal to 9.46 trillion kilometers.
Largest organ of the body is Skin and largest gland is Liver.
Kidney disease due to overdose of vitamin c.
CPU is an abbreviation of Central Processing Unit.
Gas is use in Fire Cylinders CO2.(CO2 is use for extinguishing fire)
Sulphuric Acid is use in the car batteries. An instrument designed for testing the purity of milk is called Lactometer.
Speed of Sound in Air 331 m/s.
Red Colour has largest and Blue colour has shortest Wavelength.
Logarithm tables were invented by John Napier
Fish is the Best source of protein.
Most commonly used bleaching agent is chlorine
The chief constituent of gobar gas is methane.
The frequency of which of the following is the highest? Radio waves
Kidneys organ of the body purifies the blood.
Skin is highly affected by the nuclear radiation first.
Radio waves travel with almost the velocity of Light.
0 Comments