1. Chapter 1.1
Science – Learning the “rules” of the universe through observation and experimentation.
A. How does science happen
1855 – Cathode rays discovered

2. Cathode Ray tube

4. A. How does science happen
Chapter 1.1
Science – Learning the “rules” of the universe through observation and experimentation.
A. How does science happen
1855 – Cathode rays discovered
positive
negative
barium platinum cyanide
Voltage

5. 1. Scientist Investigate
a) Collect Data
Cathode rays make minerals glow.
High voltage rays make glass glow.

7. 1. Scientist Investigate
a) Collect Data
Cathode rays make minerals glow.
High voltage rays make glass glow.
Rays can pass through thin foil.
Rays can only travel 2-3 cm in air.

8. 2. Scientist Plan Experiments
b. Form Question
i. Can rays go through glass?
2. Scientist Plan Experiments
a) What is being observed
b) Exp’t set up – Cover glass with black paper

9. c) What will be tested
“At high voltages, cathode rays will be detected outside the tube.”
3. Scientist Observe
a) Record Results
b) Not always what you expect
-minerals glowed 1 meter away.
c) New ray discovered
-X-ray (1895) Wilhelm Roentgen

10. 4. Scientist always test results
a) repeat exp’t
b) develop new exp’t
c) rays were absorbed by dense material
(Roentgen won Nobel Prize in 1901)

11. Wilhelm Conrad Roentgen

14. Thomas Edison
medical fluoroscope
1896

17. Caption: WIZARD EDISON AND EMPLOYEE INJURED BY X-RAYS AND FLUOROSCOPE, WHICH ALMOST COST DALLY'S LIFE.

19. B. Branches of Science Social Natural Natural Science Biological
Earth Science
Physical
Ecology
Botany
Geology
Physics
Chemistry
Meteorology
Zoology

20. Life (Biological) botany (plants) b) Physical Science Chemistry
- zoology (animals)
- ecology (balance in nature)
- genetics (heredity)
b) Physical Science
Chemistry
Physics
c) Combinations – biophysics, biochemistry

21. C. Science and Technology
1. Pure science - continue search for knowledge
2. Technology - application of knowledge
3. Science and tech. depend on each other.
D. Theories and Laws
1. Theories - tested explanation a) simple and clear
b) repeatable
c) use to make predictions

22. 2. Law – Statement of Observation
a) Qualitative – stated in words
b) Quantitative – equations of numbers
(easier to communicate)
3. Theories and Laws can be replaced as we learn more.

23. E. Models
1. Representation of an object or event use to make study easier.
2. Examples
i. picture
ii. Diagram
iii. Computer software
Answer objectives on page 4
Answer questions 2,5,7 at end of section