CP3 – Energy(p156-162) Efficiency Energy Stores Insulation Add the labels to complete the Sankey diagram. Use this equation to work out the efficiency of each. Toaster: Microwave: Energy Stores What are the 8 energy types? Describe how they store energy 1______________ 2______________ 3______________ 4______________ 5______________ 6______________ 7______________ 8______________ Insulation Questions: Q1) How does having a lid on the flask stop heat being transferred? Q2) Why does the glass wall have a silvered surface? Q3) What is a vacuum? How does it stop the energy from being transferred? Q4) Rubber is used as a support because it has a low thermal conductivity. What does that mean? Why is that used? Q5) The three ways of reducing thermal energy transfers through the walls of the flask are: 1- 2- 3- Energy Resources Renewable resources are: Non-renewable resources are: Complete the table Energy Type Description Pros Cons Fossil fuel Bio-fuels Wind Solar- cells Hydro-electric Tidal Calculating Energy: Q1)A car that travels at a speed of 20m/s and has a mass of 1200 kg. Q2)A year 11 pupil with a mass of 55kg swinging back on their chair and falling off it at a speed of 6m/s. Q3) A runner with a mass of 62kg running at a speed of 8m/s. Energy Transfers: Describe the following energy transfers: A ball rolling up a slope A bat hitting a ball A rock dropped from a cliff A car slowing down A kettle boiling water

CP3 – Energy(p156-162) Efficiency Energy Stores Insulation Add the labels to complete the Sankey diagram. Use this equation to work out the efficiency of each. To 2 d.p. Toaster: 300/1000 = 0.30 Microwave: 350/400 = 0.88 Energy Stores What are the 8 energy types? Describe how they store energy 1 Kinetic – anything that’s moving 2 Thermal – any object with heat 3 Chemical – anything that release energy by a chemical reaction 4 Gravitational potential – anything in a gravitational field 5 Elastic potential – Anything stretched 6 Electrostatic – two like charges that repel 7 Magnetic- two like charges that repel 8 Nuclear – atomic nuclei that release energy in nuclear reactions 700 J 50 J Insulation Questions: Q1) How does having a lid on the flask stop heat being transferred? It stops hot air rising through convection Q2) Why does the glass wall have a silvered surface? It reflects the radiated heat back into the liquid Q3) What is a vacuum? How does it stop the energy from being transferred? There are no particles. Conduction and convection can’t happen without particles. Q4) Rubber is used as a support because it has a low thermal conductivity. What does that mean? Why is that used? How easily a material allows heat to pass through. It reduces the heat that passes through it. Q5) The three ways of reducing thermal energy transfers through the walls of the flask are: 1- Increasing the thickness of the wall 2- Decreasing thermal conductivity 3- Decreasing the temperature difference between the two sides Energy Resources Renewable resources are: resources that don’t run out, can be reused Non-renewable resources are: that will run out, can’t be remade Calculating Energy: Q1)A car that travels at a speed of 20m/s and has a mass of 1200 kg. Q2)A year 11 pupil with a mass of 55kg swinging back on their chair and falling off it at a speed of 6m/s. Q3) A runner with a mass of 62kg running at a speed of 8m/s. Energy Transfers: Describe the following energy transfers: A ball rolling up a slope moves from the kinetic store to the GPE store A bat hitting a ball Moves from the bat’s kinetic to balls kinetic some lost as thermal A rock dropped from a cliff GPE is transferred to kinetic energy A car slowing down kinetic energy is lost through friction and dissipated as thermal A kettle boiling water electrical energy of the kettle is transferred to thermal 1. Label each stage 2. What is the purpose of mitosis? 3. How many daughter cells are produced? 4. Cytokinesis is the final stage. Draw it here: 5. What does diploid mean? 240 KJ 8.8 KJ 990 J 1984 J 13.1 KJ