Unit 1
What's the scientific process?
a series of steps scientists use to acquire knowledge about the world
What are the three main states of matter?
Solids, Liquids, and Gases
What's the periodic table?
organizational chart that displays elements in columns and rows according to their shared properties
What material changes in a chemical reaction?
Reactants change, forming products.
What are heterogeneous mixtures?
a mixture in which the parts are not evenly distributed throughout the entire mixture
What are molecules?
substance that is formed when two or more atoms join
What are the type of phase changes?
melting, freezing, evaporation, condensation, sublimation, and deposition
What does a chemical bond do?
it holds atoms or ions together
What's the difference between exothermic and endothermic?
exothermic- chemical reaction in which energy is released to the surrounding environment
endothermic- chemical reaction in which energy is absorbed from the surrounding environment
What's solubility?
maximum amount of solute that can dissolve in a particular solvent for a given temperature and pressure
How to write a hypothesis using the word formula?
If A(insert explanation for effects independent variable), then B(increasing or decreasing) the IV will C(increase or decrease) the DV.
IV=independent variable
DV=dependent variable
What are atoms composed of?
Atoms are composed of protons, neutrons, and electrons
What are the two chemical names?
Ionic and Covalent compounds
What's nuclear fission?
a type of nuclear reaction in which the nucleus of a heavy atom splits into two or more smaller nuclei that have masses relatively similar size
What's a neutralization reaction?
when acids and bases react with each other in a type of chemical reaction