SSC CGL Science Notes - SSC NOTES PDF
SSC CGL Science Notes

SSC CGL Science Notes

SSC CGL Science Notes:-General Science is a subject whose questions are asked in all the exams. Any competitive exam, one needs to score good marks in general science. Get complete General science notes in this blog., if your general science is not good, then you should start studying it well from now on. General Science Notes are also helpful for SSC CGL, MTS, CHSL, JE, NTPC, IBPS, SBI PO, RBI Grade B, BOB PO exam preparation.

SSC CGL Science Notes

  1. The temperature at which all substances have zero thermal energy – 273 degree celcious.
  2. Any substance which when added to a reaction, alters the rate of the reaction but remains chemically unchanged at the end of the process is called -Catalyst.
  3. The study of the inter-relations of animals and plants with their environment is called-cology.
  4. Study of insects is called-Entomology.
  5. A unit used to express the focal power of optical lenses-Dioptre.
  6. The velocity that a body with less mass must achieve in order to escape from the gravitational attraction of a more massive body is called-Escape Velocity.
  7. Laughing gas is chemically known as- Nitrous Oxide.
  8. The blood vessels carrying blood from the heart to various parts of the body is called-Artery.
  9. The distance travelled by light in one year is called -Light year.
  10. An organism which derives its nourishment from another living organism is called-Parasite.
  11. Newton’s which law states that the rate of change of momentum of a body is directly proportional to the force applied and takes place in the direction in which the force act -Newton’s second law of motion.
  12. Which is the world’s first man-made satelliteSputnik-I.(4 Oct. 1957)
  13. Which planet is the brightest of all the planets-Venus.
  14. Small pieces of solid matter which are found scattered in the inter-planetary space of the solar system are known as-Meteoroids.
  15. The largest gland in the body which is dark red in colour is- Liver.
  16. Inadequate secretion of Insulin hormone causes which disease -Diabetes.
  17. Common cold, Influenza, Chickenpox and Measles are caused due to the attack of Virus or Bacteria – Virus.
  18. In which atmospheric layer are the communication satellite located- Ionosphere.
  19. The scientific principle behind ‘Fibre Optics’ is – Total internal reflection of light.
  20. Ginger is a stem and not a root, True or False – True (because it has nodes and Internodes).
  21. When we wind a watch which energy is stored -Potential Energy.
  22. On which phenomena the process of Dialysis used on patient with affected kidneys is Based – Osmosis.
  23. When a piece of ice floating in a beaker of water melts, the level of water will rise or fall-Remains the same.
  24. Energy stored in a dry cell is – Chemical energy.
  25. When a cricketer lowers his hand while catching the ball, it saves him from injury due to – Conservation of momentum.

SSC CGL Science Note

  1. Full form of AIDS is – Acquired Immune Deficiency Syndrome.
  2. Chemical technology dealing with the conversion of base metals into gold is – Alchemy.
  3. Subtances produced by micro-organism that kill or prevent growth of other micro-organism is called -Antibiotics.
  4. Substances which react with acids to form salts is called – Base.
  5. The ancient oriental art of growing trees in dwarf form is called – Bonsai.
  6. What is the unit of heat – Calorie.
  7. The ability of a body to resist tension or compression and to recover its original shape and size when the stress is removed is called – Elasticity.
  8. The negatively charged particles which revolve around the nucleus of the atom in certain orbits is called – Electron.
  9. The branch of biology dealing with study of Heredity is – Genetics.
  10. Kwashiorkor is caused due to the deficiency of -Protein.
  11. Optical illusion often witnessed in deserts when the objects on the surface of the earth at
  12. The branch of science which deals with study of nature and properties of light is called-Optics.
  13. The scale used to measure the magnitudes of earthquakes is called – Richter scale.
  14. The heat required to raise the temperature of 1 kg of a substance through one degree celcius is called -Specific heat.
  15. The speed greater than the speed of sound is calledSupersonic speed.
  16. Volatile substance that incapacitates for a time by powerfully irritating the eyes, provoking tears is called – Tear gas.
  17. Who is the inventor of Dynamite – Alfred B. Nobel.
  18. Who discovered life in plants – Jagadish Chandra Bose.
  19. The unit used to measure loudness of sound is -Decibel.
  20. The smallest part of an element that can take part in a chemical reaction is called – Atom.
  21. Substances used for destroying or stopping growth of micro-organisms in living tissue is Called -Antiseptic.
  22. Water that does not form lather with soap easily is called – Hard water.
  23. The lines drawn on maps joining the places having same barometric pressure is called -Isobars.
  24. Lymph differs from blood in not having – Red Blood Corpuscles.
  25. Universal receivers can receive blood from – Groups O, A, B and AB
  26. Study of Grass is called – Agrostology.
  27. Study of Tumor is called – Oncology.
  28. Which physical property will be unaffected with increase in quantity – Density.
  29. Oil spreads over the surface of water because – Oil has less surface tension than water.
  30. In high mountaneous regions bleeding through nose occurs because – The pressure of the blood in thecapillaries is higher than the outside air pressure.

SSC CGL Science Note

  1. Why does a man weigh more at the poles than at the equator – Gravitational pull is more at the poles.
  2. A gas will behave as an ideal gas at – At very low pressure and high temperature.
  3. Oology is the branch of science dealing with the study of -Birds egg.
  4. Why does a drop of liquid assume a spherical shape -Because a sphere has the least surface tension
  5. When cream is separated from milk the density of milk increases or decreases-Increases
  6. Diamond is harder than Graphite due to difference of -Crystalline structure.
  7. Which combination of colours is the most convenient during day and night time– Red and Green
  8. An element which does not react with oxygen is -Helium
  9. An instrument that measures and records the relative humidity of air is – Hygrometer
  10. The different colours of different stars are due to the variation of- Temperature
  11. Which is left when an hydrogen atom loses its electron – A proton
  12. The fundamental scientific principle in the operation of a battery is – Oxidation-reduction
  13. Which metal is used to galvanise iron – Zinc
  14. The instrument used to measure the force and velocity of the wind is- Anemometer
  15. Edward Jenner is associated with – Small Pox
  16. The scientist who explained about blood circulation for the first time was – William Harvey
  17. Nitroglycerine is used as – An explosive
  18. Solar Energy is due to the process of – Fusion reactions
  19. In a dry cell battery which are used as electrolytes -Ammonium Chloride and Zinc Chloride
  20. Permanent Research Station of India, DakshinGangotri is located at – Antarctica
  21. Which types of waves are used in a night vision apparatus – Infrared waves
  22. In order to stay over the same spot on the earth, a geostationary satellite has to be directly Above – The Equator
  23. Water is used to cool the engines of cars, buses, trucks, etc. It is because water has-High specific heat
  24. Due to contract of eyeball, a long-sighted eye can only see farther objects which is corrected by using -Convex lens
  25. Rainwater collected after 30 to 40 minutes of raining is not suitable for drinking because it is – Acidic
  26. The refining of petroleum is done by the process of -Fractional Distillation Physical uantities which are completely described by a magnitude (size) alone are known as – Scalar quantities
  27. Study of the abundance and reactions of chemicalelements and molecules in the universe, and their interaction with radiation is called – Astrochemistry
  28. Birbal Sahni Institute of Palaeobotany is located at -Lucknow, Uttar Pradesh
  29. Organelles which is known as the power house of thecells – Mitochondria
  30. Photosynthesis takes place maximum in red colourand minimum in – Violet colour
  31. Other name of White Blood Cells is – Leukocytes
  32. Other name of Red Blood Cells is – Erythrocytes
  33. Which antiseptic compound is present in Dettol –Chloroxylenol
  34. What is a compound that is a white solid which absorbs water vapour from the air – Calcium

chloride

SSC CGL Science Note

  1. To which product of equivalent weight and valency of an element is equal – Atomic weight
  2. Which element forms the highest number of compounds in the periodic table – Silicon
  3. How does addition of ethylene dibromide help to petrol – Elimination of lead oxide
  4. What do we call the process of separation of pure water from impurities – Distillation
  5. What is the name of gas which is present in both the natural gas and the biogas – Methane
  6. Of which alloy the commonly used safety fuse-wire is made – Alloy of Tin and Lead
  7. What is alcohol obtained in the saponification process– Glycerol
  8. Which is used to dilute oxygen in the gas cylinders used by divers – Helium
  9. What do cathode rays case when obstructed by metal –emission of X-rays
  10. With which liqued is anomalous expansion associated – Water
  11. 100.What is a tick paste of cement, sand and water called – Mortar

SSC CGL Science Notes

flux

A measure of the amount of energy given off by an astronomical object over a fixed amount of time and area. Because the energy is measured per time and area, flux measurements make it easy for astronomers to compare the relative energy output of objects with very different sizes or ages.

frequency

A property of a wave that describes how many wave patterns or cycles pass by in a period of time. Frequency is often measured in Hertz (Hz), where a wave with a frequency of 1 Hz will pass by at 1 cycle per second.

FTOOLS

A suite of software tools developed at NASA’s Goddard Space Flight Center for analyzing high-energy astronomy data.

FTP

File Transfer Protocol — A widely available method for transferring files over the Internet.

fusion

The process in which atomic nuclei collide so fast that they stick together and emit a large amount of energy. In the center of most stars, hydrogen fuses into helium. The energy emitted by fusion supports the star’s enormous mass from collapsing in on itself, and causes the star to glow.

Galactic halo

A spherical region surrounding the center of a galaxy. This region may extend beyond the luminous boundaries of the galaxy and contain a significant fraction of the galaxy’s mass. Compared to cosmological distances, objects in the halo of our galaxy would be very nearby.

Galaxy

A component of our universe made up of gas and a large number (usually more than a million) of stars held together by gravity. When capitalized, Galaxy refers to our own Milky Way Galaxy.

Galilei, Galileo (1564 – 1642)

An Italian scientist, Galileo was renowned for his epoch making contribution to physics, astronomy, and scientific philosophy. He is regarded as the chief founder of modern science. He developed the telescope, with which he found craters on the Moon and discovered the largest moons of Jupiter. Galileo was condemned by the Catholic Church for his view of the cosmos based on the theory of Copernicus.

SSC CGL Scien Note

Gamma ray

The highest energy, shortest wavelength electromagnetic radiations. Usually, they are thought of as any photons having energies greater than about 100 keV. (It’s “gamma-ray” when used as an adjective.)

Gamma-Ray Burst (GRB)

Plural is GRBs. A burst of gamma rays from space lasting from a fraction of a second to many minutes. There is no clear scientific consensus as to their cause. Recently, their distances were determined to be large, placing the origins of the bursts in other galaxies.

Gamma-ray Large Area Space Telescope (GLAST)

An international mission launched on June 11, 2008, GLAST studies the universe in the energy range 10 keV – 300 Gev. In August 2008, NASA renamed the mission the Fermi Gamma-ray Space Telescope.

Gamma Ray Imaging Platform (GRIP)

A balloon-borne gamma-ray telescope made by a group at the California Institute of Technology. It has had many successful flights.

Gamma Ray Imaging Spectrometer (GRIS)

A balloon-borne instrument which uses germanium detectors for high resolution gamma-ray spectroscopy.

Gas

One of the three states of matter, in which atoms, molecules, or ions move freely and are not bound to each other. In astronomy, it usually refers to hydrogen or helium.

General relativity

The geometric theory of gravitation developed by Albert Einstein, incorporating and extending the theory of special relativity to accelerated frames of reference and introducing the principle that gravitational and inertial forces are equivalent. The theory has consequences for the bending of light by massive objects, the nature of black holes, and the fabric of space and time.

Giant Molecular Cloud (GMC)

Massive clouds of gas in interstellar space composed primarily of hydrogen molecules (two hydrogen atoms bound together), though also containing other molecules observable by radio telescopes. These clouds can contain enough mass to make several million stars like our Sun and are often the sites of star formation.

 

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