KAJAL MA’AM MOST IMPORTANT CLASS NOTES
♦ 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.