Principles of Chemistry Agenda Review names and collect homework Review elements Safety Review Class notes on Chemistry

Homework Pass down signed safety contract!

H hydrogen

Mg magnesium

Li lithium

Ca calcium

Na sodium

Ba barium

K potassium

Be beryllium

Sr strontium

Mg magnesium

Li lithium

Sr strontium

Na sodium

Be beryllium

K potassium

Ba barium

Ca calcium

H hydrogen

Safety Rules Review Where is the fire extinguisher? Where is the eye wash? Where do we meet in case of a fire? Where is the shower? Where is the fire blanket? Where is the phone? Where is your nearest exit?

CHEMISTRY Date:

Chemistry Definition: is the study of matter and the changes that it undergoes. Rewrite this definition in terms that an elementary student would understand.

What is matter? Provide your best definition. Anything that has mass and takes up space.

Mass vs. Weight What’s the difference? Mass is constant. It depends on the amount of matter present. Weight varies depending on the pull of gravity

Branches of Chemistry A nalytical* Studying substance to determine what they are made of (Laboratory work) ex. Food nutrients and quality control P hysical the physics behind changes of matter & the related energy changes. ex: Reaction rates and reaction mechanisms.

B iochemistry the biology of matter and processes of living organisms. ex: metabolism, fermentation * I norganic the study of the periodic table - This Class ex: metals, metalloid and nonmetals O rganic the study of carbon containing compounds. ex: pharmaceuticals and plastics.

AP BIO

Select an A and B person Without referencing your notes, person A explain the five branches to person B. Person B check for accuracy by referencing notes. Switch roles

Scientific Method Write the 6 steps to the scientific method. Compare with others. Did you get them all? 1.State the problem 2.Gather information 3.Hypothesis 4.Experiment 5.Record and Analyze Data 6.Conclusions

Hypothesis Define. A tentative explanation of some regularity of nature.

Scientific Method CONT A theory is a TESTED explanation of basic natural phenomena. –Watch out! Society uses “theory” as scientists define hypothesis. A Scientific law is a theory proven correct and there are no exceptions.

Scientific Method CONT Jack-Jack Attack!

Qual vs. Quant. Observations made could be –qualitative – describe color, odor, shape, etc. –quantitative – measured data: temperature, pressure, volume, mass, length

Variables may be… independent – controlled variable (time, temperature) (X-axis). dependent – changes depending on independent variable (Y-axis). Need a control – a standard to compare to.