1. 6 th Please be in your seat ready to go when the bell rings We will start the quiz after a short review

2. Chapter 1 The Nature of Science

3. Chapter 1 Vocabulary Science Technology Scientific theory Variable Mass Volume Weight Scientific Notation Precision Accuracy

4. What is the purpose of science? To investigate questions To support or refute a theory To gain knowledge

5. Science is a system of knowledge based on facts or principles Technology is the application of science to meet human needs

6. Theories & Laws Theory  A tested, possible explanation of a natural event. Law  a summary of an observed natural event (a repeated observation about nature)

7. *A theory must pass 3 tests: 1.A theory must explain observations simply & clearly 2. A theory must be repeatable 3. Scientists must be able to predict from a theory

8. Qualitative vs. Quantitative Qualitative Describes data using words Quality Ex. There are many red cars in the parking lot Quantitative Describes data with numbers Quantity Ex. There are 14 cars in the parking lot

9. What is it used for? Who can use it? What is it used for? Who can use it? State the Question Form A Hypothesis Test the Hypothesis Observe/Collect Data Draw a Conclusion The Scientific Method

10. Experiments How many variables are in a typical experiment? How many variables can be tested at one time?

11. The main parts of an experiment Independent Variable Dependent Variable (result) Control

12. Determine the variables in the experiment A botanist is studying the affect of fertilizer on pea plants. She test 5 plants. She adds 6 oz of fertilizer to plant 1, 7 oz of fertilizer to plant 2, 8 oz to plant 3, 9 oz to plant 4 and no fertilizer to plant 5. She waters each of the plants with 200mL of water everyday for 2 weeks and places them in the sun for 3 hours each day.

13. The Metric System The International System of Measurement (SI units)

14. Metric Conversions K H D B D C M

15. Practice Problems 550 mm = ________m 1.6 kg = ________g 2800mmol =________mol

16. Organizing Data There are 3 main types of graphs:  Bar  Line  Pie

17. Scientific Notation A value written as a simple number multiplied by a power of 10. Shortcut: If you move the decimal right the exponent is negative  If you move it to the left the exponent is positive

18. Practice 800 000 000 m 0.0015 kg 60 200 L

19. Using Scientific Notation When you multiply, you add the exponents When you divide, you subtract the exponents

20. Significant Digits (Figures) The digits in a measurement that are known for certainty.  1.638  1638  1.6