Science finals exam 4th quarter

• Position a place where someone or something is located or been put
• Motion is when a body is continuously changing it's position with respect to the frame of reference, then we say that the body is in motion.
• distance is an amount of space between two things or people
• direction a course along which someone or something move a lot
• measurement the size, length, or amount of something, as established by measuring
• SI or systeme international d'unites are; Kilometer(km), Centimeter(cm), Meter(m), Inch(in), Milligram(ml), Feet(ft)
• meter scale a device used to measure the length of any item
• Speed the rate at which someone or something is able to move or operate
• time the indefinite continued progress of existence and event in the past/present/and future
• velocity is the speed in combination with the direction of motion of an object
• light is a form of energy that can be seen when it interacts with matter
• light waves that vibrate in the direction perpendicular to the direction of their motion are called transverse waves
• light travels in straight lines. sometimes it bounces back into the direction of the source we call this reflection
• refraction is produced when the light waves bounce off a surface
• when light passes, from one material into a second material like mirror or water, the light path is either bent or reflected back
• refraction is the bending of light waves as they pass from one material to another
• diverging lenses a lense that diverges rays of light that are traveling parallel to its principal axis
• laser light has a great deal of heat energy
• conduction is the method of heat transfer that occurs through direct contact between particles within a substance
• semi conductor a good material that is neither a good conductor nor a good insulator of heat and electricity
• thermal conductivity the ability of a material to transfer heat
• convection another way by which heat energy can be transferred
• sound is a form of energy produced by vibrations that travel through a medium, such as water, or solids.
• vibrations is a rapid back and forth movement of an object or a medium
• conductors the material or substances which allow electricity to flow through them
• heat is energy that is transferred from one body to another as the result of a difference in temperature
• the molten zone acts as an electrical conductor with normal conductivity and heat is generated throughout its volume
• electricity a type of energy that consists of the movement of electrons between two points when there is a potential difference between them, making it possible to generate what is known to be an electric current
• electrical conductors; Silver, Gold, Copper, Steel, Sea water
• electrical insulators; Rubber, Glass, Oil, Diamond, Dry wood
• 1 centimeter is equals to 10 millimeters
• 1 meter is equals to 100 centimeters
• 1 kilometer is equals to 1000 meters