861. Most of the ozone in the atmosphere is concentrated in the stratosphere.
862. A slow-running pendulum clock can be sped up by reducing the length of the rod.
863. As the temperature of ice rises, the ice melts and its density decreases.
864. Alloys are made using chromium.
865. Fats in the amount of 1.0 gram give energy of 9.3 K Calories.
866. Rayon is the synthetic fiber known as artificial silk.
867. Radon is a radioactive gas.
868. The alcohol used in the preparation of dynamite is glycerol.
869. Science is derived from the Latin word “scientia,” which means knowledge.
870. Sponges do not have a nervous system.
871. The hardest substance in the human body is tooth enamel.
872. Plants and trees give out oxygen during photosynthesis.
873. The Hot Air Balloon was invented by the Montgolfier brothers.
874. Ombrophobia is the fear of rain.
875. Sour taste is detected by cells on the sides of the tongue.
876. The magnitude of energy released by an earthquake is calculated using the Richter scale.
877. The scientific name of a human is Homo sapiens.
878. Celsius and Fahrenheit are equal at -40 degrees.
879. The medical term for low blood sugar is hypoglycemia.
880. Oxytocin is known as the “love hormone.”