Part 8 Flashcards
Chemical Reaction
is a process that exchanges one bonding arrangement among atoms for a different bonding arrangement
chemical reactions happen between atoms, molecules, or compounds
Molecule
is any arrangement of two or more atoms bonded together
h20, co2
Compound
is any molecule that contains two or more elements
so h20, c02 and c6h1206 are all compounds but h2 and 02 are not compounds.
2AGN03 + CU —–> CU(NO3)2 + 2AG
Reactants are the substances on the left side of a chemical equation
Products are the substances on the right side of the equation
Double replacement
A+B- + C+D- ——-> A+D- + C+B-
Synthesis
Two different substances combine to form a more complex product.
Synthesis of Water:
2H2 + 02 ——-> 2H20
Decomposition
That complex product is broken down into its constituent parts
Decomposition of water:
2H20 —–> 2H2 + O2
Data
is a collection of information
the usefulness of data, and whether one point of data can be considered a fact depends on how the information was collected
Empirical
meaning that is was collected by observation through the senses rather than being theoretical or otherwise not derived from experience
its often the starting point for a scientific investigation that eventually leads to scientific experiments
Experiment
is a systematic procedure used to test a hypothesis
a controlled experiment is the study the effect of an independent variable and should be reproducible when the experiment is run again
Correlations
scientific experiments are not designed to test correlation, linked trends in data that are not causative.
Correlations may be observed when analyzing data from scientific experiments
a correlational study is the appropriate method for exploring linked data trends
independent Variable
the independent variable is the cause
dependent variable
is the effect
