1 / 15

Unit 1 Motion and Forces

Unit 1 Motion and Forces. Lecture: Covering chapter 1. CHAPTER 1. The Scientific Method. 6 steps 1. State the problem 2. Research 3. Form hypothesis 4. Test hypothesis 5. Analyze data 6. Draw conclusions. Hypothesis. A hypothesis is a testable statement It is NOT a question

netis
Download Presentation

Unit 1 Motion and Forces

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 1 Motion and Forces Lecture: Covering chapter 1

  2. CHAPTER 1

  3. The Scientific Method • 6 steps • 1. State the problem • 2. Research • 3. Form hypothesis • 4. Test hypothesis • 5. Analyze data • 6. Draw conclusions

  4. Hypothesis • A hypothesis is a testable statement • It is NOT a question • Ex: My plant will grow taller when it is given milk than when it is given water.

  5. Experiments • Your hypothesis is tested in your experiment • In the experiment you will have an independent variable • As it changes, it affects the dependent variable • Ex: the taller I am (independent) the farther I jump (dependent)

  6. Constants and Controls • The variables that do not change in your experiment are called constants • Ex: which melts faster, sugar or ice? • Constant: flame, container, distance to heat source • A control is what you use to compare your experiment to • Ex: Medicated group compared to the placebo group

  7. Theory verses Law • Theory • Explanation • Has undergone a great deal of testing • Can be changed and adapted as needed • Law • Explains how natural phenomena works • Always gets the same results

  8. SI System of Measurement • Length meter m • Mass gram g • Time second s • Temperature kelvin k

  9. Common SI prefixes • Kilo- 1,000 (bigger) • 1 kilogram = 1,000 grams • Milli- 0.001(smaller) • 1,000 milligrams= 1 gram • Centi- 0.01 (smaller) • 100 centimeters = 1 meter

  10. Converting between units • How many milligrams are in 60 kilograms? • How many centimeters are in 15 millimeters?

  11. Volume • Volume is the amount of space an object takes up • Volume= length × width × height • Know that 1mL = 1 cm3 • What is the volume of an object which measures 5cm by 15cm by 20 cm?

  12. Density • Density is mass divided by volume • Mass is measured in grams • Volume is measured in cm3 or mL • What is the density of an object that weighs 10g and has a volume of 2mL?

  13. Kelvin and Celsius • Kelvin is the SI unit for temperature • To calculate Kelvin, simply add 273 to the temperature in Celsius • Absolute zero is 0 Kelvin • Absolute zero therefore is -273°Celsius

  14. Line graphs vs. Bar graphs

  15. Line graphs are used to measure data compared to time • The X axis is time (horizontal) • The Y axis varies (vertical) • Bar graphs are used to compare data • Pie graphs are used to compare percentages

More Related