CHAPTER 1 Flashcards
(19 cards)
Define MATTER
Anything that occupies SPACE and has MASS
What is a SOLID?
State of matter that is…
- rigid
- definite shape
- fairly constant volume
What is a LIQUID?
State of matter that is…
- definitive volume
- indefinite shape
What is a GAS?
State of matter that has…
- no definitive volume
- no definitive shape
What is the LAW OF CONSERVATION OF MATTER?
When matter converts from one type to another or changes form, the total amount of matter present does not change detectably.
What is a PURE SUBSTANCE?
Pure substances have the same makeup and properties
- elements
- compounds
What is an ELEMENT?
Pure substance that cannot be broken down into simple substances by chemical change
What is a COMPOUND?
Pure substance comprised of two or more elements - may be broken down by chemical changes to yield either elements or compounds or both.
What is a HETEROGENEOUS mixture?
A mixture with a composition that varies from point to point - it is not the same throughout
What is a HOMOGENEOUS mixture?
A mixture that is uniform and appears visually the same throughout.
What is an ATOM?
Smallest particle of an element that can enter into a chemical combination.
What is a MOLECULE?
Bonded collection of two or more atoms of the same or different elements.
What is a PHYSICAL CHANGE?
Change in the state or properties of matter that DOES NOT involve a change in its chemical composition.
What is a CHEMICAL CHANGE?
Change producing a different kind of matter from the original kind of matter
What is a PHYSICAL PROPERTY?
characteristic of matter that is
not associated with any change in its chemical composition
What is a CHEMICAL PROPERTY?
behavior that is related to the change of one kind of matter into another kind of matter
What is ACCURACY?
how closely a measurement aligns with a correct value
What is PRECISION?
how closely a measurement matches the same measurement when repeated
What is UNCERTAINTY?
estimate of amount by which measurement differs from true value
