Vocab
What is the difference between a law and a theory?
law - scientific descriptions
theory - scientific explanations
What is evidence of order in nature?
days, weeks, seasons, elemental patterns
What are atoms made of?
electrons, neutrons, protons
What is the process that allows other scientists to review and assess research?
Peer review
What does SI stand for?
International System of Units
What is a pure substance?
precisionA material made of only one kind of element or compound (NOT a mixture)
What is ethics?
A system of moral values or proper conduct.
What is a molecule?
a group of two or more atoms covalently bonded together.
What is the process of understanding gathered date?
Analysis
What SI unit is used for electric current?
ampere
What is a luster?
The quality of how a material reflects light
What is a physical change? Give an example.
A change in matter that does not alter the composition of a substance. boiling water, watcher freezing to ice
What is the difference between weight and mass?
weight - measure of gravity acting on the matter of an object, can change with location
mass - amount of matter in an object, cannot change with location, measured in grams
What step in Scientific Inquiry involves the experiment?
investigation
What SI unit is used for measuring light?
candela
What is a compound?
Two different elements that are chemically combined.
What is a chemical change? Give an example.
A change that alters the chemical composition of substances. burning gasoline.
What is the Law of Conservation of Matter?
Matter can neither be create nor destroyed it can only change forms.
What is the initial, testable explanation of a phenomenon?
Hypothesis
What is the mole?
The SI unit used to measure the amount of a substance.
What is a mixture and what are the two types?
Two different elements that are physically combined.
1. homogeneous - a mixture with a uniform appearance
2. heterogeneous - a mixture that doesn't have a uniform appearance
What is vaporization?
The change of matter from liquid to gas. Two types: boiling and evaporation
What is an element?
A pure substance that consists of atoms with the same atomic number (those on the periodic table).
What process allows scientists to find out what others already know about the topic?
research
What is an atom?
The basic building block of all matter.