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PCM. Changes in Matter Benchmark 4

PCM. Changes in Matter Benchmark 4. Describe energy transformations involved in physical, chemical and nuclear changes, and contrast their relative magnitudes. Energy Types. As we have seen, there are three types of energy: Kinetic Potential Radiant.

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PCM. Changes in Matter Benchmark 4

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  1. PCM. Changes in Matter Benchmark 4 Describe energy transformations involved in physical, chemical and nuclear changes, and contrast their relative magnitudes.

  2. Energy Types As we have seen, there are three types of energy: KineticPotentialRadiant Kinetic Energy is the energy of MOTION. Potential Energy is STORED energy. Radiant Energy is energy associated with waves from the electromagnetic spectrum (heat, radiation, light, etc.). Energy is neither created nor destroyed, only converted between these forms

  3. Roller coaster energy transformation Interactive Coaster Animation Energy conversion Tutorial Energy—How many forms? An introduction to energy

  4. Kinetic Energy • Kinetic Energy is the energy of motion. Any object in motion has Kinetic Energy. • The amount of Kinetic Energy depends on two factors: • The mass of the object. • 2. The speed of the object. Which has more Kinetic Energy? A bowling ball rolling down the hallway at 1 m/s or a bowling ball rolling down the hallway at 5 m/s? A bowling ball rolling down the hallway at 1 m/s or a golf ball rolling down the hallway at 1 m/s?

  5. Potential Energy Potential Energy is stored energy. Energy can be stored in various forms. 1. Energy can be stored by raising an object above the ground (gravitational potential energy). 2. Energy can be stored by compressing or stretching a spring (elastic potential energy). 3. Energy can be stored in the chemical bonds of a compound (chemical potential energy). 4. Energy can be stored in the form of electricity (electrical potential energy). Energy can be released from each of these forms into Kinetic Energy!

  6. Radiant Energy Radiant Energy is energy associated with waves from the electromagnetic spectrum (heat, radiation, light, etc.). There are various forms. 1. Heat from any source (the sun, fire, etc.) is infrared waves. 2. Visible Light Energy can be stored by compressing or stretching a spring (elastic potential energy). 3. Gamma Rays and X-Rays are high energy electromagnetic waves.

  7. Real-world contexts: Common physical, chemical and nuclear changes, including changes of state, burning, electrical decomposition of water, photosynthesis, cellular respiration, fireworks and dynamite, nuclear power, stars.

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