Environmental Chemistry

1
Environmental Chemistry

• Introduction

2

• Over the past week since we have met, list 5
  activities that you have done.
• How do these relate to chemistry?

3
What objects in this room are related to
chemistry?

• Plastics
• Fabrics
• Cleaning products
• Binders
• Paper
• Make-up
• Shoes
• Batteries
• Computers

4
Chemistry in our daily lives.

• Antibiotics
• Food
• Transportation
• Sports
• Farming
• Military
• Industry

5
Why Study Chemistry?

• Chemistry can be useful in explaining the natural
  world, preparing people for career opportunities,
  and producing informed citizens.
• Food preparations, water, bread dough rises, golf
  course designer, photographer, scientific
  research, pharmaceuticals, federal grants

6
Science

• a process that starts with a question
• a search for the truth
• Use it any time you answer a question
• Investigate
• Experiment
• Observe
• Test

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Chemistry

• Study of matter
• What something is made of
• What is the internal arrangement

8

• Matter is anything that has ________
  and occupies .
• Chemistry is the study of the _________ of
  matter and the that matter
  undergoes.

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Chemical

• Any substance that has a definite composition

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Scientific Method

• pattern of thinking critically about a ?
• organized way to figure out a problem
• 4 steps
• Observe
• Form a hypothesis
• Experimentation and Data
• Draw conclusions

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Using scientific method

• To organize thinking
• Observing look, see, compare
• Hypothesis looks like could be
• Testing test only one variable at a time
• Experiment collect data
• - use tools
• - use your senses

12
Demonstration

• Using the scientific method to identify a
  substance.
• Two clear liquids. Are they the same?
• Hypothesis Although both liquids look alike,
  they may be different.
• Test hypothesis smell, looks, mass, density,
  boiling point, flammable, etc
• Conclusion We have 2 different liquids

13
Theories and Laws

• Theory an explanation tested by observations
• must be valid and repeatable
• must predict behavior
• it is NOT a guess
• can be modified or changed
• ie. handle gets hot when pan is heated
• Law a statement about nature that seems to be
  true all the time
• - does not explain why
• ie. Newtons 1st Law
• - neither are absolute

14
Paper Tower

• Make the tallest free-standing tower from this
  piece of paper.
• Use the scientific method
• Observe
• Form a hypothesis
• Experiment and Data
• Draw conclusions
• The tower must stand for 5 seconds
• Plan first, build last (use handout to plan)

15
Hypothesis Activity

• Use a hypothesis to explain what flavor of ice
  cream you like the best and why
• How would you test this hypothesis?
• Complete the hypothesis worksheets with a partner