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8th Grade Chapter 3 Lesson 1



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8th Grade Chapter 3 Lesson 1 8th Grade Chapter 3 Lesson 1 Presentation Transcript

  • 8th Grade Chapter 3 Lesson 1 Pgs. 98-106 For Student Use Only
  • Moving Matter • God created the physical world and the rules that guide it – Physics is the study of the properties, changes, ad interactions of matter and energy in the physical universe. • Physics is the study of matter and energy – Matter- in anything that takes up space, has substance, and under ordinary conditions cannot be created or destroyed.
  • Moving Matter • Matter has three basic forms: – Solid – Liquid – Gas
  • Moving Matter • Solid: – Has a definite shape and a definite volume (amount of space) • Liquid – Has definite volume, but no definite shape • Gas – Has no definite volume and no definite shape
  • Moving Matter • Sticking Together – Atom- most basic unit of substance – Molecules- groups of atoms linked together – Cohesion- the feature that allows matter of the same kind to stick together – Adhesion- allows molecules of a different kind of matter to stick together
  • Moving Matter • Properties of Matter – Volume- space a substance takes up • Length x Width x Height • Found in cubic inches – Mass- quantity of matter (amount of material in an object) • Weight- the force of gravity on an object – Equal masses have equal weights if they are at the same location
  • Moving Matter – Mass is not affected by a change in gravitational attraction • Density: – Density the amount of mass per volume of a substance – Density= Mass/Volume • Volume= Mass/Density • Mass=Density/Volume
  • Measuring Motion • Motion – Distance- the length of the path that an object has traveled. • Measured in Meters, Kilometers, or miles – Speed- how fast something is moving • Measured by distance over a certain amount of time • Speed= distance/time
  • Measuring Motion • Velocity – Velocity- speed in a particular direction • How fast and the direction it is going in • Uniform Motion: – Velocity does not change • Accelerated Motion: – Velocity that does change • Acceleration: – The change of velocity over a period of time
  • Measuring Motion • Acceleration: – Acceleration of Gravity: • 9.8 m/sec2 – Acceleration • Can be positive or negative – Positive- the velocity increases or its direction changes – Negative- (deceleration) because the object slows down • Any change in direction or any change in speed is acceleration