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Quarterly Review April 2014

Quarterly Review April 2014. Define acceleration. What causes objects to accelerate?. A measure of the change in velocity during a period of time. Increase Speed Decrease Speed Change direction. A bird flew 50 meters in 5 seconds. What is the bird’s average speed? SHOW YOUR WORK!.

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Quarterly Review April 2014

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  1. Quarterly Review April 2014

  2. Define acceleration. What causes objects to accelerate? A measure of the change in velocity during a period of time. Increase Speed Decrease Speed Change direction

  3. A bird flew 50 meters in 5 seconds. What is the bird’s average speed? SHOW YOUR WORK!

  4. Compare contact and noncontact forces. Give an example of a each. • Contact Force – • Noncontact Force - A push or pull on one object by another that is touching it. Example: Friction A force that one object can apply to another object without touching it. Example: Gravity, Electric Forces, Magnetism

  5. Define static, sliding and fluid friction. • STATIC – • SLIDING – • FLUID - Friction that acts on objects that are not moving. When solid objects slide over each other. A force produced by a fluid (gases or liquids) Examples: engine oil, grease

  6. Define Newton’s Law’s • First Law– • Inertia – An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an unbalanced force. The tendency of an object to resist a change in its motion

  7. Define Newton’s Law’s • Second Law– • Example – The acceleration of an object is equal to the net force exerted on the object divided by the object’s mass. If you kick a soccer ball and bowling ball with the same force, the soccer ball will accelerate faster. (It has less mass)

  8. Define Newton’s Law’s • Third Law– • Example – For every action there is an equal and opposite reaction. Gas molecules push down and the rocket launches upward.

  9. What is the force that allows electrons to spin in a circle around the nucleus? Centripetal force

  10. motion Kite stuck in tree, Ball on top of a hill Fossil fuels, food, Gasoline, petroleum electromagnetic

  11. particles system echolocation vibration disturbance

  12. power plant, Fusion (takes place in the sun, fission current object’s height

  13. In which position does the ball have the most Gravitational Potential Energy? C B D Point C Farthest distance from the Earth’s surface E A

  14. Explain the difference between an energy transfer and an energy transformation. • Energy Transfer - • Energy Transformation – • According to the law of conservation of energy, energy is never ________________ or ____________________. • Explain the multiple transformations that occur when a match is struck. the passing of energy from one object to another object the changing of energy from one form of energy to another form of energy. created destroyed Mechanical ➔ Chemical ➔ Radiant ➔ Thermal

  15. Chapter 5 • 1. At the beach the sand always feels hotter than the • water. Water has ______ specific heat, therefore it takes longer to heat up. • 2. While boiling water in a pot you touch the metal handle and it feels hot. Metals have a ________specific heat therefore they are good _______________. • 3. A polar bear has thick fur. This helps the bear keep heat inside. The fur is an example of an ____________. high low conductors insulator

  16. Touching a hot iron Conduction Heat is transferred by the movement of currents within a fluid (liquids or gases). Hot air rises, cold air sinks. Convection The transfer of thermal energy from one material to another by electromagnetic waves. Sun warming beach

  17. The picture below shows three images of a balloon. Picture B indicates the balloon size at room temperature. Identify what happens in Picture A and Picture C. Balloon C • Warmer temperature • Faster particle movement • Particles are farther apart • Thermal Expansion Balloon A • Colder temperature • Slower particle movement • Particles are close together • Thermal Contraction A B C

  18. They move faster What happens to particle movement when things are heated? When you place an ice cube into a drink. The heat is going from __________ to the_______. Chapter 6 the drink ice Gas Solid Farther than a solid, closer than a gas Very little attraction; particles are far apart Definite volume Definite volume

  19. Gas Vaporizing/Boiling Melting Condensation Liquid Freezing Solid

  20. What is an example of the phase change that occurs at Point 6. • Are you increasing or decreasing thermal energy at Point 6?   • What is the temperature at Point 2?(In Celsius)   • What is the temperature at Point 4?(In Celsius) • In order from a solid to go to a liquid, what must happen to thermal energy? • Foggy mirrors after a warm shower • Droplets form in lid of something warm Decreasing 0° C 100° C Increase thermal energy (Think about ice melting)

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