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science

QuestionAnswer
Matter Anything that has mass and takes up space.
Chemistry The study of matter and how matter changes.
Substance A single kind of matter that is pure, meaning it always has a specific make-up, or composition.
Physical property A characteristic of a substance that can be observed without changing it into another substance.
Chemical Property A characteristic of a substance that describes its ability to change into different substances.
Atom the basic particle that all elements are made.
Molecules A group of two or more atoms held together by a chemical bond
Weight The measure of the force of gravity on you.
Mass The amount of matter in the object
SI International unit of measure that scientists use.
Volume The amount of space that matter occupies.
Density How tightly packed the matter is in an object, compares the objects mass to its volume. Density formula D: M/V
Physical Change It alters the form or appearance of matter but does not turn any substance in the matter into a different substance. If a substance undergoes a physical change is still the same substance after the change.
Chemical Change A change in matter that produces one or more new substances, also called a chemical reaction.
Law of Conservation of Mass Matter is not created or destroyed in any physical or chemical change only changed into something different.
Thermal Energy The total energy of the motion of all of the particles (atoms/molecules) in an object. (Heat Energy)
Endothermic Change A change in which energy is absorbed.
Exothermic Change A change in which energy is released.
Chemical Energy The energy stored in the chemical bonds between atoms is a form of energy.
Created by: user-1713560
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