1. chapter 1 chemistry: an introduction

2. Today we will:
understand the importance of learning chemistry
define chemistry
recognize the general steps scientists use in solving problems
illustrate the scientific method
develop successful strategies for learning chemistry

3. 1.1 The importance of learning chemistry
not just chemists use chemistry!
so do doctors, lawyers, mechanics, firefighters, forensic scientists, detectives…
chemists help produce new materials & sources of energy
even if you don’t become a chemist, chemistry influences your life every day

4. But … there’s a dark side too!
* Chemicals themselves aren’t bad or good, but they can be used in good or bad ways,
* Chemists can be shortsighted, driven by greed, and very stubborn in their ways - like a lot of humans!

5. A real-world chemist
make sure and read this section for an idea of how a typical chemist works
just a few of many fields in chemistry:
Even ice cream chemistry!

6. Thinking Cap Which do you prefer?
A working refrigerator (keeping your food bacteria-free) ?
Or…
An intact ozone layer (keeping your body cancer-free) ?

7. real-world chemistry freon When first synthesized, it was a wonder
It could be used as a non-corrosive, stable refrigerant; was safer than ammonia
then it was discovered that freon (a CFC) was actually destroying the ozone layer
It is now banned!

8. learning chemistry
you will learn in this class how to be a better problem solver (which is what employers look for!)
is often not easy, but is never impossible
this course is also designed to help you understand what chemistry is, how it works, and emphasizes how it applies to your life

9. 1.2 what is chemistry?
the science that deals with the materials of the universe, and the changes these materials undergo (matter and change)
often called the central science, because it is behind a lot of what happens around us

10. as we go on through chemistry, we’ll understand better the nature of these chemicals
and how we can manipulate them

11. Root Words
Macro =
Examples:
Micro =

12. we’ll see things in the big world, the everyday view, and refer to this as the macroscopic world
we’ll also look into the unseen microscopic world

13. Chemistry
looks at the macroscopic, then tries to explain using the microscopic

14. 1.3 solving problems using a scientific approach
everyday we encounter a “problem,” an unexpected event that needs explaining
we all go through several steps to find an explanation…

15. 1 recognize the problem and state it clearly
called in science making an observation

16. 2 propose a possible solution to the problem or possible explanation
called formulating an hypothesis

17. 3
decide which solution is best, or which explanation is most reasonable
use old info or experience or new insights or new info
searching for new info, called: performing an experiment

18. 1.4 using scientific thinking to solve a problem
this whole section is a great example of how to use scientific problem solving
but you can also think of personal experiences…
why did the light go out? why did my car stop? why did I take chemistry? why didn’t I sign up for marine biology? what is this thing on my shoulder?

19. Think-Pair-Share
What was your thought process when getting dressed for school today?

20. 1.5 the scientific method
the whole process of solving problems is called the scientific method

21. The Scientific Method Slide 1 1. Select Layout that looks like
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22. we have to repeat the process many times
once our hypotheses start working we can develop a theory
theory (model) = set of hypotheses that gives an overall explanation of some phenomenon
a good theory should be able to predict what may happen

23. The difference between observation and theory
observations can be witnessed, measured, recorded
theories are just best explanations of what happened
humans are fallible, so are their explanations and interpretations

24. Law v. theory
a law is a summary of observed behaviors, not an explanation
For example: the law of gravity says things fall; it tells what happens
A theory of gravity tries to explain why things fall (gravity = warp in spacetime?)

25. remember the scientific method is immersed in humanity
\ it can have problems, but it works well

26. 1.6 learning chemistry need to learn to think small
need to learn a new vocabulary
need to get used to being wrong in a good way
need to learn to examine
need to be patient!!!

27. learning chemistry: it’s your job

28. Sum It Up
The study of chemistry is all about ____________ & ____________.
We look at the ___________, then try to explain it using the _____________.
It’s ok to be ___________!