Scientific Definitions
Speed: The distance traveled by the moving body is called speed.
Pressure: Pressure is defined as thrust per unit area. Pressure Thrust/Area.
Science: Knowledge arranged in an orderly manner is called scientific Knowledge or science.
Liquid: A liquid is an incompressible fluid. it lacks rigidity It presents a free surface when put on open Vessel.
properties of liquid: 1. Liquids have a definite volume.2. Liquid no definite shape.3. They exert pressure on all sides.4. They transmit pressure equally in all directions.5. They keep their level.
Malleability: This is a property found in metals. By virtue of this property, metals can be beaten into sheets.
Ductility: Ductility is the property by virtue of which metal can draw into wires by passing them through a hole or a die.
Newtons’ Laws of Motion:
First Law: Everbody in this universe continues in its state as the rest of motion in a straight line unless. it is compelled by some external force to change that state.
Second Law: the rate of change of momentum is directly proportional to the force acting on it and place in the directing of the force.
Third Law: To every action, there is an equal and opposite reaction.
Lever: The lever is a rigid bar that can turn freely about a fixed point called Equilibriums.
Motion: A body is said to be in motion if it occupies different positions at different times, with respect to the surrounding objects.
Velocity: Speed in a defined direction is Known as velocity.
Rest: A body is said to be in a rest if its position with respect to the surrounding objects remains unchanged at different instants of time.
Uniform Velocity: A body said to posses uniform velocity if it covers equal distance in equal intervals of time.
Equilibrium: A body said to be in the equilibrium state of equilibrium when the various forces acting on it do not change its state of rest or uniform motion in a straight line.
Pascal’s Law: Pressure applied to any part of a liquid contained in the vessel is transmitted with undiminished force in every direction and acts with the same force upon equal areas.
Pulley: Pulley is a disc having a groove in its edge and is capable of turning freely on an axle through the center.
Matter: Matter is something that occupies space and has some weight.
Cohesion: The force of attraction which exists between the molecules of one and the same substance is called cohesion.
Distillation: It is the process of converting a liquid into vapors and then cooling the vapors again into liquid form.
Density: Density is defined as the mass per unit volume.
Humidity: The degree of dampness of the atmosphere is called Humidity.
Latent Heat: Latent heat is the amount of heat required to change one gram of ice at 0 degrees centigrade to one gram of water at 0c. It is equal to 80 calories of heat and is found by the method of mixtures.
E.C.G: E.C.G is primarily a tool for evaluating the electrical events within the heart muscles.
Chemical Element: A chemical element is that part of matter which cannot be divided into simpler parts.
Variable Velocity: A body is said to have variable velocity if it covers equals distances in unequal intervals of time or unequal distances in equal intervals of time.
Pole Star: A fixed Star North pole of the earth Points towards it.
Solar Cells: Razor-thin strips of silicon that convert the energy of the sun’s rays photoelectrically into electrical energy.
Meteorites: Metro is a solid body from the outer space small meteors burn up completely in the atmosphere, but some of the larger ones survive and fall to earth as meteorites.
Solar Eclipse or Lunar Eclipse: The passage of the non-luminous body into the shadow of another.An ECLIPSE OF THE MOON or Lunar Eclipse occurs, when the SUN, the EARTH, and the MOON in line so that the shadow of earth falls upon Moon.
Solar System: System of 9 planets:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus,Neptune, and Pluto and of the belt of ASTEROIDS revolving in elliptical orbits around the sun. The orbits are nearly circular.
Planets: There are Heavenly bodies revolving in the definite orbits about the sun they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, pluto.
Virus: A member of a group of microscopic agents that infect plants and unable to multiply outside the host tissues. They also attack bacteria and mushrooms. Fully formed mature tires consist of Nucleic acid within protein and PID coat.
Fermentation: It is a chemical change in which decomposition is caused by enzyme action, Pasteur proved that fermentation was caused by yeast.
Enteric Fever: Typhoid fever which is caused by contaminated water, milked or unsanitary conditions.
Diabetes: A disease of the pancreas which is caused by urine.
Myopia: Short sightedness defects of vision that is caused by the distortion of the lense, the defect is correctable by the use of concave lenses.
Disinfectant: A substance that is capable of destroying germs.
Allergy: Excessive sensitiveness to the action of some foods or other substances, normally harmless.
Photosynthesis: In green plants, synthesis of organic compounds from water and carbon dioxide, using energy absorbed chlorophyll from sunlight is called photosynthesis.
Retina: Nerve cells that receive the sensation of light lie and the back of the eye in retina apart of an eye.
Radio Waves: Are sent from the instrument. The invisible object reflects the waves.
Seismograph: It is an instrument used for recording earthquake shocks.
Speedometer: It records the speed at which a vehicle moves.
Nuclear Fission: It is a nuclear reaction in which heavy atomic nuclear ie uranium splits into almost two equal parts. It emits neutrons and releases a very large amount of nuclear energy.
Energy: The capacity for doing work is called energy.The energy of various types of electrical, chemical nuclear, etc.
Willow:It is a tree whose branches bend easily and are used to make baskets and cricket bats.
Protoplasm: Living material within the cell is called protoplasm.
Chromosome: Bearer of genetic information from one generation to next.
Genetics: A science which deals with heredity. It deals with the transmission of character from one generation to another.
Germ cells: Cells that participate in reproduction.
Hydrophone: An instrument which issues for recording sound underwater.
Hydrometer: An instrument that is meant to measuring the specific gravity of liquids.
Electrometer: It is an instrument for measuring electricity.
Insulator: These are the substances which do not electricity to pass through them.
Conductors: These are the substances that allow electricity to pass through them.
Oxidation: A process of addition of oxygen.
Potential Energy: Energy possessed by the body by virtue of position or shape.
Nuclear Fuel: A substance that undergoes nuclear fission a nuclear reactor.
Outer space: It is that part of the universe that lies beyond the earth’s atmosphere.