Part 8

is a process that exchanges one bonding arrangement among atoms for a different bonding arrangement chemical reactions happen between atoms, molecules, or compounds

is any arrangement of two or more atoms bonded together h20, co2

is any molecule that contains two or more elements so h20, c02 and c6h1206 are all compounds but h2 and 02 are not compounds.

Reactants are the substances on the left side of a chemical equation Products are the substances on the right side of the equation

A+B- + C+D- ——-> A+D- + C+B-

Two different substances combine to form a more complex product. Synthesis of Water: 2H2 + 02 ——-> 2H20

That complex product is broken down into its constituent parts Decomposition of water: 2H20 —–> 2H2 + O2

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

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

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

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

the independent variable is the cause

is the effect