Independent of the amount of the substance that is present. Ex- Density, boiling point color etc/ Can be observed without changing a substance into another substance
What is Physical Properties? Physical change?
100
Energy possessed by an object by virtue of its position
What is Potential Energy?
100
Explains the process of combustion.. Combustible materials contain phologiston, an undetectable released when the material burns.
What is Phlogiston Theory?
100
Simplest type of substance with unique physical and chemical properties. An element consists of only one type of atom. It cannot be broken down into any simpler substance by physical and chemical needs.
What is Element?
100
Atoms are combined in compounds in specific ratios and each atom has a specific mass. Each element constitutes a fixed fraction of the total mass in a compound
What is Law of Definite Composition?
200
Dependent on the amount of the substance present. Ex-mass, volume, energy etc? Can only be observed when a substance is changed into another substance.
What is Chemical Properties? Chemical Changes?
200
Energy that results from the motion of an object
What is Kinetic Energy?
200
This theory overthrew Phlogiston. Oxygen, a normal component of air, combines with a substance when it burns. In a closed container a combustible substance stops burning when it has combined with all the available oxygen. A metal calx (metal oxide) weighs more than the the metal because its mass includes the mass of the oxygen
What is Lavoiser?
200
A structure that consists of two or more atoms that are chemically bound together and thus behaves as an independent unit
What is Molecule?
200
Atoms of an element have the same mass and atoms are indivisible. When different numbers of atoms of elements combine, they must do so in ratios of small, whole numbers.
What is Law of Multiple Proportions
300
A match ignites to form ash and a mixture of gases
What is chemical change?
300
Began in the 1st century and searches for means to change baser metals (lead) to purer metals such as gold. Invention of distillation, percolation, and extraction
What is Alchemical tradition?
300
Observations, Hypothesis, Experiment, Model (Theory), Further Experiment.
What is Scientific Approach?
300
a substance composed of two or more elements which are chemically combined
What is Compound?
300
Mass/charge*charge
What is mass of electron?
400
Searches for roots, herbs, and other plant matter to make medicine.
What is Medical?
400
Impression in measurements is caused errors. Errors that result from random fluctuations, no specific cause therefor cannot be corrected
What is Precision?
400
A group of two or more elements and/ or compounds that are physically intermingled.
What is Mixture?
400
Discovery of the atomic nucleus
What is Rutherford's u-scattering experiment?
500
Perspiration evaporates when you relax after jogging.
What is physical change?
500
Introduction of quantitative measurement. Books were published that described how to purify, assay, and coin silver and gold. How to use balances, furnaces and crucibles.
What is technological tradition?
500
Inaccuracy in measurement caused by systematic Errors. Errors caused by limitations in the instruments or technique or experimental design. Can be reduces by using more accurate instruments.
What is Accuracy?
500
Atoms cannot be created or destroyed or converted into other types of atoms. Since every atom has a fixed mass during a chemical reaction the same atoms are present but in different combinations; therefore there is no mass change overall