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anything that takes up space and has mass
the measure of the amount of matter
the measure of the Earth's gravitational pull on matter
the smallest unit of an element that maintains the chemical identity of that element
a pure substance that cannot be broken down into simpler stable substances (one kind of atom)
a pure substance that can be chemically broken down into simpler, stable, substances (made of atoms of 2 or more elements that combine chemically)
characteristics that allows us to distinguish one kind of matter from another (2 kinds; extensive & intensive)
depends on the amount of matter present (volume, length, mass, etc.)
does not depend on the amount present (boiling point, melting point, density, etc.)
a characteristic that can be observed or measured without changing its' identity (boiling, melting, etc.)
any change in property that does not change its' identity (phase changes, etc.)
a substance's ability to undergo changes that transforms it into different substances (burn, rust, tarnish, etc.)
a change in which 1 or more substances are converted to other substances
the composition is the same throughout; cannot be separated by physical means (elements & compounds)
a combination of 2 or more substances where each retain its identity & properties; can be separated by physical means (2 types)
composition & properties are not uniform throughout
composition & properties are uniform throughout
Are pure substances always homogenous or heterogenous?
1. production of light 2. production of gas 3. energy change (hotter/colder) 4. production of a precipitate 5. color change
What are the 5 pieces of evidence of a chemical reaction?
pure substance and mixture
What can matter be classifies as?
atoms, elements, compounds
What is the hierarchy of compounds, elements and atoms?
organic, inorganic, physical, analytical, biochemistry, and theoretical
What are the 6 branches of chemistry?
dissolving salt in water; chemical or physical change?
food rotting; chemical or physical change?
nail rusting; chemical or physical change?
cutting plastic; chemical or physical change?
burning sticks; chemical or physical change?
copper nitrate and sodium hydroxide forms a precipitate; chemical or physical change?
ductility of copper; intensive or extensive?
boiling point of water; intensive or extensive?
beaker's mass; intensive or extensive?
volume of water; intensive or extensive?
sugar; mixture, element, compound?
chocolate chip cookie; mixture, element, compound?
brass; mixture, element, compound?
salt; mixture, element, compound?
copper; mixture, element, compound?
sugar water; mixture, element, compound?
pop-tarts; heterogenous or homogenous?
gatorade; heterogenous or homogenous?
iron and pepper; heterogenous or homogenous?
the study of most carbon-containing compounds
the study of non-organic substances, many of which have organic fragments bonded to metals (organometallics)
the study of the properties and changes of matter and their relation to energy
the identification of the components and composition of materials
the study of substances and processes occurring in living things
the use of mathematics and computers to understand the principles behind observed chemical behavior and to design and predict the properties of new compounds
What is the primary motivation behind basic research?
solve a particular problem
What is applied research designed to do?
What is chemistry usually classifies as?
iron ore; homogenous or heterogenous
quartz; heterogenous or homogenous
salt; heterogenous or homogenous