701. Spring tides occur on new moon and full moon days because on these days Sun, moon and earth are in a straight line.
702. Clayey soil is best suited for cotton.
703. The time interval between two beats of a normal human heart is 1 second.
704. The material used for bleaching paper pulp is Sodium hypochlorite.
705. Mercury has the smallest diameter.
706. The instrument, used for recording tremors of earth, is known as Seismograph.
707. Ionosphere makes the radio transmission possible.
708. Colour of the skin is due to the presence of Melanin.
709. Natural rubber is a protein.
710. Concave mirror can be used to focus sunlight.
711. Liver secrets bile.
712. When an object is transferred from the earth to the moon its mass remains unchanged.
713. The unit of sound is Decibel.
714. It is economical to transmit electric power at high voltage.
715. Diamond does not have a tetrahedral structure.
716. The unit to measure the supersonic speed is Mach.
717. The application of the principles of genetics to the improvement of human race is known as Eugenics.
718. The penetration of x-rays through an object depends upon the object’s Density.
719. Using Ultrasound, we can determine the Structure of the body.
720. The find the hidden secrets under the water, the ships and submarines use the Sonar system.
721. The dirt in the dirty water can be separated by using the Ultrasound.
722. Recording of brain waves from outer surface of head is called E.E.G (Electroencephalograph).
723. The first rocket launched by Pakistan was Rahber.
724. The first Nuclear power plant in Pakistan was established at Karachi.
725. Sodium benzoate is used for preservation of food grains.
726. Steel is more elastic than rubber because ratio of stress to strain is more.
727. Haemoglobin makes the blood look red.
728. Mercury is extracted from Cinnabar.
729. Cattle-bone powder is used as fertilizer as it is rich in Phosphorous.
730. Heating element of an electric heater Nichrome.
731. Dry sand appears bright while wet sand appears dark because of Reflection.
732. Acid rain contains high levels of Sulphuric acid.
733. A woman’s voice is shriller than a man’s due to smaller vocal chords.
734. The blood glucose level is commonly expressed as Milligram per decilitre.
735. Soft drinks such as colas contain significant quantities of Caffeine.
736. A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel absorbs moisture.
737. Fluorescent tubes are fitted with a choke. The choke coil reduces current in the circuit.
738. For reproduction of sound, a CD (Compact Device) audio player uses a Laser beam.
739. When a CD (Compact Disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of Reflection and diffraction.
740. If a U-238 nucleus splits into two identical parts, the two nuclei so produced will be Radioactive.
741. The total genetic material within an individual is known as the Genome.
742. The part of the body directly affected by Pneumonia is Respiratory system.
743. As the amount of clay in a soil increases, its water retaining capacity increases.
744. “O” blood group of human beings is a universal donor.
745. Amino acids are a product of the digestion of Protein.
746. Ptyalin is a starch digeting enzyme.
747. Pepsin, a digestive enzyme, is produced in the Stomach.
748. Milk is nearly a complete food by itself.
749. The acids turn the blue litmus paper Red.
750. Permanent magnets can be made from Cobalt.
751. Nights are cooler in the deserts than in the plants because Sand absorbs heat more quickly than the earth.
752. Atmospheric pressure exerted on the earth is due to the Gravitational pull.
753. Fertilizer having high nitrogen content is Urea.
754. Potassium Carbonate is used for removing air bubbles from the glass during its manufacture.
755. The chemical name for “baking soda” is Sodium Bicarbonate.
756. The snow on the mountains does not melt all at once when it is heated by the sun because it reflects most of the heat from the sun.
757. First time AIDS was identified in 1983.
758. Anthrax is a bacterial disease.
759. Blood is formed in bone marrow in human body.
760. Quark is the smallest part of the matter discovered by the scientists.
761. Trachoma is a disease of the eye.
762. The heart of a normal adult human being weighs about 300 grams and that of woman 200 grams.
763. Heart pumps 5 litre blood per minute in a normal human adult (at resting position).
764. The part of the body directly affected by Rikets is bone tissue.
765. Histology is the study of tissues.
|