7th Grade Science Vocabulary Crossword Puzzle

The knowledge or source of knowledge acquired by means of the senses, particularly by observation and experimentation
A variable whose variation does not depend on that of another
A variable whose value depends on that of another
Studying something carefully in order to learn
How power is transported in
A wave vibrating in the direction of propagation
A wave vibrating at right angles to the direction of its propagation
A wave that is an oscillation of matter, and therefore transfers energy through a medium
One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays
The range of wavelengths or frequencies over which electromagnetic radiation extends
Allowing light to pass through so that objects behind can be distinctly seen
Allowing light, but not detailed images, to pass through; semitransparent
Not able to be seen through; not transparent
The fact or phenomenon of light, radio waves, etc., being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density
The change of energy from one form to another
States that energy can neither be created nor destroyed; rather, it transforms from one form to another
States that matter is composed of a large number of small particles—individual atoms or molecules—that are in constant motion
The sum of kinetic and potential energy in an object that is used to do work Mechanical
The process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material
A material through which electric current can pass
A substance that does not readily allow the passage of heat or sound
The transfer of heat through fluids (gases or liquids) from a warmer spot to a cooler spot
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization
The branch of biology that deals with the relations of organisms to one another and to their physical surroundings
Any living component that affects the population of another organism, or the environment
A nonliving condition or thing, as climate or habitat, that influences or affects an ecosystem and the organisms in it they can determine which species of organisms will survive in a given environment
An autotrophic organism that serves as a source of food for other organisms in a food chain
An organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material
An organism that consumes producers
A hierarchical series of organisms each dependent on the next as a source of food
A system of interlocking and interdependent food chains