Chapter 1

1. Chapter 1 The World of Physical Science

2. What is Science? __________is a process of gathering knowledge about the natural world. Can you give some examples of sciences?

3. Science Life Earth and Space Physical

4. What is Physical Science? Physical science is the study of _______ and ________. Matter is made up of atoms and has both a _________________. ________ is the ability to do work. The branches of physical science __________ __________

5. Chemistry Chemistry is the study of all forms of matter, including ____________________________ ____________ Chemistry looks at the ___________and __________ of matter.

6. Physics __________ looks at energy and how that energy affects matter. Motion, force, gravity, electricity, light, and heat are parts of physics.

7. What are the “steps” of the Scientific Method? The scientific method are the ways in which scientists answer questions and solve problems. 1. 2. 3. 4. 5. 6. 7.

8. Steps of the Scientific Method 1) Observation __________________________________ ______________ – color, odor, taste, etc. ______________ – measurements. Instruments used:

9. Steps of the Scientific Method 2) Ask a question 3) Hypothesis • An explanation that is based on prior scientific research or observations and can be tested. • If – then statement.

10. Steps of the Scientific Method 4) Testing the Hypothesis – Experiment A ______________ compares the results from a control group with the results from the experimental groups. The groups are exactly the same except for one factor. That factor is the ____________. ______________ is the variable you change. Ex. Time _______________ changes in response to the independent variable. Ex. Distance

11. Steps of the Scientific Method 5) Collect, Record, and Analyze Data __________ is the information gathered through your experiment. All information needs to be recorded in a notebook, in a data table or other recording devices. ____________ material makes analyzing the data easier.

12. 6) At the end of the investigation, you ________________________ • Accept or reject • Change your hypothesis and retest. 7) Communicate results • How can you do that? Steps of the Scientific Method

13. Theory vs. Law A _________ is an explanation for many hypotheses and observations. ________________ Can predict future results. Can not be proven 100% Examples A _____ is a summary of many experimental results and observations. Laws are ___________ and do not change. Examples Newton’s Laws Conservation of Mass

14. Measurements Length Volume Mass Temperature Density Time

15. Metric Measurements Prefixes

16. K H D __ d c m • 1378 millimeters = ________ dekameters • 45 centimeters = ________ decimeters • 4 liters = ________ hectoliters • 5 kilograms = ________ grams Metric Conversions

17. A way to express very small or very large numbers • Example: • 12345 = 1.2345 x 104 • 0.00456 = 4.56 x 10-3 ____________ – the # of times the decimal was moved (+) to the left (-) to the right _________ __________ – must be between 1 and 9 Scientific Notation

18. 56934 = • 1280 = • 0.0345 = • 0.0000037 = Scientific Notation

19. 2.347 x 10-3 = • 8.98736 x 104 = • 3.48763 x 10-4= • 5.7654 x 105 = Reverse it! (+) right (-) left Scientific Notation