Chapter 3 Review Energy is the ability to do _________ Work 8th Grade Science Work Energy is the ability to do _________
The energy an object has because it is in motion. Definition Example Kinetic Kite in a tree Fossil fuels, coal, oil, gasoline, match, food you eat Visible light, electromagnetic spectrum The energy an object has because it is in motion. Running, Moving Car Potential Stored energy that depends on the interaction of objects, particles, or atoms. Energy that is stored in and released from the bonds between atoms Chemical Radiant The energy carried by electromagnetic waves.
Energy Definition Thermal Sound Example Mechanical Heat Echolocation Windmill, Roller Coaster, Car Echolocation 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 Sound The form of energy associated with the vibration or disturbance of matter.
Energy stored in and released from the nucleus of an atom. Definition Example Nuclear Fission, Fusion, Power Plant Outlet Earthquake 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
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
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.
Give an example of: Inclined Plane Lever Wheel & Axle 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
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
Draw a picture of a ball falling in the air. Label the points of G. P 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
Organize all the forms of energy into the chart below. Potential Kinetic Both KE + PE Waves Nuclear Electric Mechanical Seismic Chemical Thermal Radiant Gravitational Sound Elastic