Topic 6: Transferring Energy
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1 Topic 6: Transferring Energy Transferring Energy Thermal energy can be transferred 3 ways: 1) Radiation 2) Conduction 3) Convection
2 1) RADIATIONTRANSFERS ENERGY Use p. 226 to answer the following questions about radiation. Energy can be transferred even though there are no particles to transfer the energy. This type of energy transfer is called radiation. Radiation is. Energy that is transferred in this way is called or electromagnetic radiation (EMR) Radiant energy travels in. These waves can travel through space, air, glass and many other materials. There are different forms of EMR, including Radiant Energy has 3 characteristics: 1) 2) 3) Energy can be transferred even though there are no particles to transfer the energy. This type of energy transfer is called radiation. Radiation is energy being transferred without the movement of matter. Energy that is transferred in this way is called radiant energy or electromagnetic radiation (EMR) Radiant energy travels in waves. These waves can travel through space, air, glass and many other materials. There are different forms of EMR, including: radio waves, microwaves, visible light, and X-rays. Radiant Energy has 3 characteristic s: 1) Behaves like waves 2) Can be absorbed, reflected or transferred through objects 3) Travels across empty space at a very high speed
3 2) Conduction Use p. 229 to answer the following questions about conduction. Conduction means that This is the transfer of thermal energy through the collision of. Most especially gold and are excellent heat. and are not good at transferring thermal energy. Poor conductors are called. To insulate something means that it stays or longer. 2) Conduction CONDUCTING ENERGY THROUGH SOLIDS Thermal conduction is the process of transferring energy through direct collisions. This is the transfer of thermal energy through the DIRECT collision of PARTICLES. Most METALS especially gold and COPPER are excellent heat CONDUCTORS. GLASS and WOOD are not good at transferring thermal energy. Poor conductors are called HEAT INSULATORS. To insulate something means that it stays WARM or COLD longer.
4 CONVECTION: ENERGY ON THE MOVE CONVECTION Convection is the transferring of energy through. Fluids are. In convection, the warm fluid from place to carrying the energy with it. The moving fluid is called a. Draw the diagram of the candle on page 230 below. Label all parts. CONVECTION CONVECTION: ENERGY ON THE MOVE Convection is the transferring of energy through FLUIDS. Fluids are MATERIALS THAT CAN BE POURED OR THAT CAN FLOW FROM PLACE TO PLACE. In convection, the warm fluid MOVES from place to PLACE carrying the THERMAL energy with it. The moving fluid is called a CONVECTION CURRENT. Draw the diagram of the candle on page 230 below. Label all parts.
5 WHY DO FLUIDS RISE AND SINK AND CREATE CONVECTION CURRENTS? As each section is warmed the particles spread out so there are fewer than when it was cold, so the warm section is light (less dense) and rises. Colder fluid pushes down and nearby warm fluid is moving up, this creates the flowing movement of a convection current.
6 conduction convection radiation
7 A volleyball rockets across the net! This fast movement means that there was a amount of energy. The energy source was the person s that hit it. The impact of their on the ball transferred energy to the. Not ALL the from their fist was transferred to the. After the shot was made the person s feels warmer. The part of the ball that was hit also up. When the ball hit the floor the warmed up a bit more. The spot on the where the ball landed up a bit too. A volleyball rockets across the net! This fast movement means that there was a LARGE amount of energy. The energy source was the person s FIST that hit it. The impact of their FIST on the ball transferred energy to the BALL. Not ALL the ENERGY from their fist was transferred to the BALL. After the shot was made the person s FIST feels warmer. The part of the ball that was hit also WARMED up. When the ball hit the floor the BALL warmed up a bit more. The spot on the FLOOR where the ball landed WARMED up a bit too.
8 Look at each letter in the diagram below. Explain in the table what is happening Text pg. 232 Fig 3.26 (volleyball) A B C D E F G Look at each letter in the diagram below. Explain in the table what is happening Text pg. 232 Fig 3.26 (volleyball) A B C D E F G The moving fist (energy source) has a large amount of energy. Most of the energy is transferred to the entire volleyball, which moves away rapidly. Some energy is transferred to individual particles in the skin and the volleyball, which vibrate more rapidly, producing a temperature increase. Energy is transferred from the ball to the floor. Particles that make up the floor vibrate more rapidly, producing a temperature increase. Energy is transferred by conduction to nearby particles in the floor. Convection currents transfer energy through the air. Energy is also transferred to air particles by compressing them and starting a sound wave. The sound wave distributes this energy throughout.
9 Text pg. 232 Fig 3.26 (volleyball) ALL ENERGY TRANSFER SYSTEMS HAVE THESE 5 THINGS IN COMMON. DESCRIBE EACH. (Use p. 232 & 233) 1. ENERGY SOURCE- 2. DIRECTION OF ENERGY TRANSFER- 3. TRANSFORMATIONS- 4. WASTE HEAT- 5. CONTROL SYSTEMS-
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