GED: Physical Science Exam Questions And Answers Well Elaborated Guaranteed Pass.

atoms - correct answer Basic unit of matter protons - correct answer Positively charged particles electrons - correct answer Negatively charged particles neutrons - correct answer the particles of the nucleus that have no charge nucleus - correct answer A region that is located at the center of an atom and contains most of the atom's mass (protons and neutrons) ions - correct answer Charged particles isotopes - correct answer Atoms of the same element that have different numbers of neutrons. molecule - correct answer A group of atoms bonded together element - correct answer A pure substance made of only one kind of atom compound - correct answer A substance made up of atoms of two or more different elements joined by chemical bonds periodic table - correct answer A chart of the elements showing the repeating pattern of their properties chemical properties - correct answer Characteristic that cannot be observed without altering the substance physical properties - correct answer A characteristic of a pure substance that can be observed without changing it into another substance. density - correct answer Mass / Volume states of matter - correct answer the physical forms of matter, which include solid, liquid, and gas solids - correct answer particals that move very little are aranged in a tight, regular pattern liquids - correct answer doesn't keep the same shape, keeps the same volume gases - correct answer A state of matter, have no fixed shape and take on the shape of the space they're in chemical formula - correct answer A combination of symbols that represents the elements in a compound. chemical equations - correct answer A representation of a chemical reaction using symbols of the elements to indicate the amount of substance of each reactant and product. conservation of mass - correct answer The principal stating that matter is not created or destroyed during a chemical reaction balance an equation - correct answer is making an equation have the same number of the smae kind of element on each side of the equation limiting reactant - correct answer the substance that controls the quantity of product that can form in a chemical reaction synthesis reactions - correct answer Two or more small molecules combine to form a larger one. A+B = AB decomposition reaction - correct answer a reaction in which a single compound breaks down to form two or more simpler substances replacement reaction - correct answer A reaction where compounds are rearranged into different compounds. solution - correct answer A homogeneous mixture of two or more substances solute - correct answer A substance that is dissolved in a solution. solvent - correct answer A liquid substance capable of dissolving other substances aqueous solution - correct answer a solution in which water is the solvent concentration - correct answer A measurement of how much solute exists within a certain volume of solvent solubility - correct answer A measure of how much solute can dissolve in a given solvent at a given temperature. saturation - correct answer The maximum concentration of a solution. Saturation depends on temperature, volume, and type of solvent unsaturated - correct answer A solution that contains less than the maximum amount of dissolved solute in a concentration. saturated - correct answer A solution that contains all of the solute it can hold at a given temperature is ___. supersaturated - correct answer a solution that contains more solute than it can theoretically hold at a given temperature; excess solute precipitates if a seed crystal is added dilute - correct answer A solution that has a low concentration of solute concentrated - correct answer Describes a solution that has a relatively large amount of dissolved solute pH scale - correct answer Measures acidity and alkalinity acidic - correct answer solutions with pH numbers less than 7 alkaline - correct answer solutions with pH numbers greater than 7 neutral - correct answer A solution with a pH of 7. energy - correct answer Ability to do work chemical energy - correct answer Energy stored in chemical bonds electrical energy - correct answer The energy of electric charges radiant energy - correct answer energy that travels by waves or particles, particularly electromagnetic radiation such as heat or x-rays mechanical energy - correct answer the energy associated with the motion and position of everyday objects nuclear energy - correct answer Energy stored in the nucleus of an atom thermal energy - correct answer Heat energy potential energy - correct answer Energy that is stored and held in readiness kinetic energy - correct answer Energy in motion waves - correct answer repeated pattern that transfers energy from one place to another transverse wave - correct answer A wave that moves the medium in a direction perpendicular to the direction in which the wave travels longitudinal wave - correct answer A wave in which the vibration of the medium is parallel to the direction the wave travels wavelength - correct answer The distance between two corresponding parts of a wave frequency - correct answer How many wave peaks pass a certain point per given time electromagnetic radiation - correct answer a form of energy that exhibits wavelike behavior as it travels through space temperature - correct answer A measure of how hot or cold something is. heat - correct answer Energy in transit due to a temperature difference between the source from which the energy is coming and a sink toward which the energy is going. conduction - correct answer Form of heat transfer where heat energy is directly transferred between molecules through molecular collisions or direct contact. convection - correct answer The transfer of heat by the movement of a fluid radiation - correct answer The direct transfer of energy by electromagnetic waves endothermic - correct answer A description of a change in which a system absorbs energy from its surroundings. exothermic - correct answer Chemical Reaction in which energy is primarily given off in the form of heat speed - correct answer Distance divided by time velocity - correct answer Speed in a given direction acceleration - correct answer The rate at which velocity changes momentum - correct answer The product of an object's mass and velocity force - correct answer A push or a pull 1st Law of Motion - correct answer an object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force 2nd Law of Motion - correct answer describes motion produced by unbalanced forces (Force= mass X acceleration) 3rd Law of Motion - correct answer for every action there is an equal and opposite reaction law of universal gravitation - correct answer the scientific law that states that every object in the universe attracts every other object gravity - correct answer (physics) the force of attraction between all masses in the universe free fall - correct answer the motion of a falling object when the only force acting on it is gravity mass - correct answer A measure of the amount of matter in an object weight - correct answer A measure of the force of gravity on an object work - correct answer Force exerted on an object that causes it to move; Force x Distance simple machines - correct answer a machine with few moving parts, making it easier to do work (there are 6: lever, pulley, wheel and axle, inclined plane, wedge, and screw) inclined plane - correct answer a simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp lever - correct answer a simple machine that consists of a bar that pivots at a fixed point called a fulcrum pulley - correct answer A simple machine that consists of a rope that fits into a groove in a wheel screw - correct answer a simple machine that is an inclined plane wrapped around a central cylinder to form a spiral wedge - correct answer a simple machine that is an inclined plane that moves wheel and axle - correct answer a simple machine consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects mechanical advantage - correct answer the number of times a machine increases a force exerted on it