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Chapter 3 Review 8 th Grade Science

Chapter 3 Review 8 th Grade Science. Work. Energy is the ability to do _________. The energy an object has because it is in motion. Running, Moving Car. Stored energy that depends on the interaction of objects, particles, or atoms. Potential.

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Chapter 3 Review 8 th Grade Science

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  1. Chapter 3 Review 8th Grade Science Work • Energy is the ability to do _________

  2. The energy an object has because it is in motion. Running, Moving Car Stored energy that depends on the interaction of objects, particles, or atoms. Potential Energy that is stored in and released from the bonds between atoms Chemical The energy carried by electromagnetic waves. Radiant

  3. The sum of KE and PE of the particles that make up an object. Thermal The sum of potential energy and kinetic energy in a system of objects. Mechanical The form of energy associated with the vibration or disturbance of matter. Sound

  4. Energy stored in and released from the nucleus of an atom. The energy that an electric current carries is a form of KE. Electrical The energy transferred by waves moving through the ground. Seismic

  5. How can you increase an object’s Kinetic Energy? 1. Increase Mass 2. Increase Velocity • A lit match produces which two types of energy? Radiant Energy & Thermal Energy

  6. State the Law of Conservation of Energy. Energy cannot be created or destroyed by ordinary means. Energy can be transformed from one form to another. • Compare and contrast energy transfer and energy transformation. Energy transfer is when energy travels from one object to another. Energy transformation is when energy is converted to another form.

  7. Joe lifts a bag of cement 2 meters above the floor, using a force of 125 N. How much work is being done on the bag of cement? W = F x d W = 125N x 2m W=250 J • Give an example of: • Inclined Plane • Lever • Wheel & Axle Ramp, Slide Seesaw Manual Pencil Sharpener

  8. Give four energy transformations that happen when lighting a match. Sliding Match across box → Mechanical Energy Tip of Match (Sulfur) → Chemical Energy Spark → Radiant Energy Fire → Thermal Energy

  9. Draw a picture of a ball falling in the air. Label the points of G.P.E. and K.E. Explain the transformation between kinetic and potential energy C The ball has Kinetic Energy at points A & B. At Point C the energy is transformed into potential energy. Points D & E both have kinetic energy. Point C has the greatest Potential Energy & Point E has the most Kinetic Energy (right before the ball goes into his hand) B D E A

  10. Organize all the forms of energy into the chart below. Nuclear Mechanical Seismic Electric Chemical Thermal Radiant Sound Gravitational Elastic

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