Science Flashcards 9th Grade Vocab Terms.

Science Flashcards 9th Grade Vocab Terms.
Created Dec 14, 2009
by gestone
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Analyze
To separate into basic parts; to evaluate results of an experiment.
Closed system
A system in which matter may not enter or leave.
Conclusion
A statement of the findings of an experiment that is supported by scientific evidence (data).
Controlled variable
The conditions that are kept the same from trial to trial in a scientific investigation.
Responding variable
The factor of a system being investigated that changes in response to the independent (manipulated)...
Hypothesis
A testable prediction for a specific problem or question based on what has already been learned.
Independent (maniuplated) variable
The factor of a system or experiment that is changed to determine its relationship to the dependent...
Model
A simplified representation of a system. Useful for studying systems that are too big, too...
Subsystem
A smaller group of interrelated parts within a larger system.
System
A group of interrelated parts or conditions through which matter, energy, and information flow.
Boiling point
The temperature at which a liquid changes state and becomes a gas.
Characteristic Propertiy
A distinguishable trait, quality, or property.
Chemical reaction
A process that results in the conversion of chemical substances (reactants) to other substances...
Condensation
The change of the physical state of matter from a gas to a liquid.
Gas 
A state of matter consisting of a collection of particles without a definite shape or volume.
Liquid
A form of matter that takes the shape of its container and has a definite volume.
Melting point
The temperature at which a solid becomes a liquid.
Physical change
Any change of a substance that is reversible, such as a change of state from solid to liquid,...
Solubility
The ability of a given substance to dissolve in a liquid.
Solution 
A mixture in which particles of one substance are evenly distributed through another substance.
Adaptation
Any change in the structure or functioning of an organism that is favored by natural selection...
Atmosphere
A layer of gases that surrounds the Earth and other planets.
Condution
The transfer of heat energy a warmer substance to a cooler substance through direct contact
Convection
The physical movement of molecules within fluids (e.g. liquids and gases); one of the major...
Eclipse
An astronomical event that occurs when one celestial object moves into the shadow of another.
Ecosystem
A natural unit consisting of all planets, animals, and microorganisms (biotic factors) in an...
Fault
In geology a rock fracture that shows evidence of relative Earth movement. Some may extend...
Organism
A living thing such as an animal, plant, fungus, or microorganism. Capable of reacting to stimuli,...
Producer
An organism that makes its own food.
Solar System
The Sun and those celestial objects bound to it by gravity, including eight planets, moons,...
Atom
The smallest unit of matter consisting of a dense central nucleus surrounded by a cloud of...
Compound
A substance consisting of two or more different elements chemically bonded together.
Conservation of Mass
A physical law stating that the total amount of mass isn a closed system remains constant....
Decompose
To break down into simpler forms of matter
Density
Mass per unit volume
Element
A pure chemical substance composed of the same type of atom.
Gravity
The force of attraction between two objects
Mass
A measure of the amount of matter in an object
Proton
A positively charged particle located in the nucleus of an atom.
Weight
The strength of the gravitational pull on an object.
Accelerate
Change in velocity over time. The rate at which sometimes speeds up or slows down.
Conservation of Energy
A physical law stating that the total amount of energy in a closed system remains constant....
Energy
The ability to do work
Energy transformation
Change of energy from one form to another.
Force
A push or pull. (In physics, it is whatever can cause an object with mas to accelerate. Has...
Frictional force
The force acting in the opposite direction of motion.
Heat
The transfer of thermal energy between substances
Matter
Anything that has mass and that takes us space.
Speed
The rate of motion; the distance traveled divded by the time of travel.
Temperature
An average measure of how quickly the particles of matter are moving in a substance.


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