♦ The aorta is the largest artery in the human body.

♦ The most abundant substance in the human body is water (55-60%).

♦ Sperm is the smallest cell in the human body. It is a male reproductive cell.

♦ Adrenaline hormone is also called ‘do or die’ hormone.

♦ The hypothalamus gland is called the ‘Head Master’ gland.

♦ Jaw bone is the strongest bone in the human body.

♦ The smallest bone in the human body is the stapes that lie in the ear.

♦ The longest bone is the femur (thigh).

♦ 4 ° C The density of water is maximum at the temperature.

♦ Bauxite is the major mineral of aluminum.

♦ Blood deficiency causes anemia.

♦ Vitamin C is helpful in healing wounds.

♦ Banana is found in undesirable genitalia.

♦ Blood in the cockroach is colorless.

♦ Tobacco contains a toxic substance called nicotine.

♦ Yellow color of urine is due to pigment called urochrome.

♦ Beer is made from fermentation while alcohol is made from distillation.

♦ Due to reflection we see things.

♦ The stamp is affixed on the envelope by the adhesive force.

♦ Anthracite type coal is of best quality. It contains the highest amount of carbon.

♦ The unit of mass is fortigram and the unit of mass is Newton.

♦ Mercury, cesium, gallium are liquid metals, the rest are solid metals.

♦ –40 ° Centigrade and –40 ° F are the same.

♦ Soybean has the highest protein content.

♦ Protein deficiency – Kwashioscare and Merasmus diseases occur.

♦ Sodium rises in an independent state, so it is stored in kerosene.

♦ White phosphorus is stored in water.

♦ Silver is the best conductor of electricity.

♦ The water drops become round due to surface tension.

♦ National Science Day is celebrated on 28 February.

♦ Carbon dioxide gas is the major responsible gas for the greenhouse effect.

♦ The ozone system protects the Earth’s organisms by absorbing ultraviolet rays.

♦ Carbon dioxide is used to extinguish fire.

♦ The first heart transplant was performed by Dr. Christian Bernard.

♦ Heavy water is used as diluent in nuclear furnace.

♦ A human with AB blood group is called universal receiver and a human with O blood group is called universal donor.

♦ Red blood cells are formed in the bone marrow and white blood cells are formed

in the bone marrow, spleen and lymph cells.

♦ The red color of the blood is due to the iron element present in the protein called hemoglobin.

♦ Chloroform is used as anesthetic.

♦ There are 206 bones in the human body.

♦ Tungsten is the hardest substance.

♦ Enzymes are special types of proteins.

♦ The liver is the largest gland in the human body.

♦ Red blood cells are cells without nuclei.

♦ The most abundant element in the atmosphere is nitrogen.

♦ The heart beats can be heard with a stethoscope.

♦ 0 ° Kelvin temperature is called absolute zero temperature. –273 ° C The value of kelvin is 0 ° k.

♦ The most common element found in the ground layer is oxygen.

♦ In a plane mirror, the image of an object looks similar to that used in homes.

♦ Convex mirrors are used by motorists.

♦ Physicians use a concave mirror to examine the inner parts of the ear, nose, throat etc.

♦ Sodium bicarbonate is called backing soda.

♦ The atomic bomb is based on nuclear fission.

♦ Red, Green and Blue are the primary colors.

♦ Rainbow has purple, purple, blue, green, yellow, orange and red colors (purple).

♦ The highest wavelength is of red light and the lowest is of purple light while the highest deviation is of purple color and the least is of red color.

♦ Hydrogen atom is the atom which does not have neutron in its nucleus.

♦ Bronze is made of copper and tin, gun mantle copper, tin and lead, brass copper and zinc and stainless steel consists of iron, chromium, carbon and nickel.

♦ Cobalt 60 is used in cancer, radio isotopic gold 198 is used in the treatment of blood cancer.

♦ Cadmium is used as a controller for chain reaction in a nuclear reactor.

KAJAL MA’AM MOST IMPORTANT CLASS NOTES