| A | B |
|---|
| Concentration of matter of an object | energy |
| Number of individuals in the same species that live in a given area | Density |
| The mass per unit volume of a substance in a given area | Density |
| Layering matter in a natural process | Deposition |
| The shaking of the ground caused by a sudden release of energy in Earth's crust | Earthquake |
| An integrated unit of biological community, its physical environment, and interactions | Ecosystem |
| A substance that cannot be reduced to a simpler substance by chemical means | Element |
| A source of usable power | Energy |
| A pyramidal diagram that compares the amount of energy available at each position, or level, in the feeding order | Energy pyrimid |
| A change of energy from one form to another (e.g., mechanical to electrical, solar to electrical). | Energy transfer |
| The sum of conditions affecting an organism, including all living and nonliving things in an area, such as plants, animals, water, soil, weather, landforms, and air | Environment |
| The sum of conditions affecting an organism, including all living and nonliving things in an area, such as plants, animals, water, soil, weather, landforms, and air | Equator |
| The wearing away of Earth's surface by the breakdown and transportation of rock and soil | Erosion |
| The process by which a liquid is converted to its vapor phase by heating the liquid at the surface of that liquid | Evaporation |
| A procedure that is carried out and repeated under controlled conditions in order to discover, demonstrate, or test a hypothesis | Experiment |
| Transfer of energy through various stages as a result of feeding patterns of a series of organisms | Food Chain |
| The interconnected feeding relationships in a food chain found in a particular place and time | Food web |
| A quality that tends to produce movement or acceleration of a body in the direction of its application | Force |
| A push or pull | Force |
| A whole or part of a plant or animal that has been preserved in sedimentary rock | Fossil |
| A whole or part of a plant or animal that has been preserved in sedimentary rock | Friction |
| The pivot point of a lever | Fulcrum |
| A large collection of stars, gases, and dust that are part of the univese bound together by gravitational forces | Galaxy |
| A force of attraction between two masses | Gravitation |
| The observed effect of the force of gravitation | Gravity |
| A place in an ecosystem where an organism normally lives | Habitat |
| A form of energy resulting from the temperature difference between a system and its surroundings | Heat |
| An animal that feeds on plants | Herbivore |
| A type of rock that forms from molten or partly molten material that cools and hardens | Igneous Rock |
| A type of simple machine with slanted surface that makes it easier to move a mass from a lower point to a higher point | Inclined plane |
| The property of a body, due to its mass, that causes it to resist any change in its motion unless overcome by a force | Inertia |
| A procedure that is carried out in order to observe a response caused by a stimulus | Investigation |
| The energy possessed by a body because of its motion | Kinetic |
| A type of simple machine that consists of a rigid bar that pivots about a fulcrum | Lever |
| The entire sequence of events in an organism's growth and development | Life Cycle |
| Electromagnetic radiation that lies within the visible range | Light |
| One of the fundamental states of matter with a definite volume but no definite shape | Liquid |
| Having the property of attracting iron and certain other materials by virtue of a surrounding field of force | Magnetic |
| The amount of matter an object contains | Mass |
| A solid, liquid, or gas that possesses inertia and is capable of occupying space | Matter |
| A type of rock that forms from existing rock because of extreme changes caused by heat, pressure, or chemical environments | Metamorphic rock |
| Relating to an object too small to be visible without the use of a microscope | Microscopic |
| The product of a thorough blending of two or more substances, not chemically combined | Mixture |
| A nature satellite that revolves around a planet | Moon |
| A phase that indicates the fraction of the Moon's disc that is illuminated (as seen from Earth) | Moon phase |
| A resource that can only be replenished over millions of year | Nonrenewable resource |
| A structure containing different tissues that are organized to carry out a specific function of the body | Organ |
| Any living plant, animal, or fungus that maintains various vital processes necessary for life | Organism |
| Any living plant, animal, or fungus that maintains various vital processes necessary for life | Photosynthesis |
| A reaction: a change in matter from one form to another, without forming new substances | Physical Change |
| A large body in space that orbits a star and does not produce light of its own | Planet |
| Any alteration of the natural environment producing a condition harmful to living organisms, may occur naturally or as a result of human activities | Population |
| The energy an object has because of its position or structure | Potential Energy |
| Stored energy | Potential Energy |
| An organism that preys on and consumes animals | Predator |
| An organism caught or hunted for food by another organism | Prey |
| An organism that makes its own food from the environment | Producer |
| Unicellular organisms belonging to the kingdom Protista | Protist |
| A type of simple machine, a circular lever, usually a wheel with a groove where a rope can be placed and used to change the direction of a force | Pulley |
| The bouncing off or turning back of light, sound, or heat from a surface | Reflection |
| A change in the direction of a wave that occurs as it passes from one medium to another of different density | Refraction |
| A resource that is replace or restored, as it is used, by natural processes in a reasonable amount of time | Renewable resource |
| Any material that can be used to satisfy a need | Resource |
| A plan of inquiry that uses science process skills as tools to gather, organize, analyze, and communicate information | Scientific Method |
| Rock formed by layers of sediment that overlay and squeeze together or are chemically combined | Sedimentary rock |
| A star and all the planets and other bodies that orbit it | Solar system |
| The region in space where planets and other bodies move | Solar System |
| The state of matter with a definite shape and a definite volume | Solid |
| A mixture of two or more substances uniformly dispersed throughout a single phase | Solution |
| A large, gaseous, self-luminous body held together by gravity and powered by thermonuclear reactions | Sun |
| A set of objects, organisms, or different parts acting to form a whole | System |
| Similar cells acting to perform a specific function | Tissue |
| There are four basic types: muscle, connective, nerve, and epidermal | Tissue |
| The surface, shape, and composition of a land area | Topography |
| The total sum of all matter and energy that exists | Universe |
| A vent or fissure in Earth's surface through which magma and its associated materials are expelled | Volcano |
| A measure of the amount of space an object takes up | Volume |
| The path water takes as it is being cycled through the environment, including condensation, evaporation, and precipitation | Water Cycle |
| The natural processes that break down and change rock into soil, sand, and other materials | Weathering |
| A type of simple machine which has a circular frame or disk revolving around a central axis | Wheel and axle |
