Answer all the questions in pictures with good explanations.
A camper decides to make hot chocolate by heating the 1water in a metal pct over the campre. Which letter represents thermal energy transfer by way of convection? A OB QC 0D Anya placed an ice cube on the sidewalk on a warm day. The ice cube soon melted to form a puddle. What process caused the ice cube to melt? 0 Heat transferred through the ice cube by convection. 0 Heat transferred from the air to the ice cube by radiation. 0 Heat transferred from the air and the pavement by conduction. Heat transferred through the ice cube into the pavement by conduction. An automobile engine transforms chemical energy of fuel primarily into 0 electrical energy and light energy. 0 electrical energy and mechanical energy. 0 thermal energy and light energy. :9 thermal energy and mechanical energy. What is the difference between potential energy and kinetic energy? (0 Potential energy is the energy of an object due to its position, while kinetic energy is energy due to its motion. 0 Potential energy is the energy of an object due to its motion, while kinetic energy is energy due to its position. 0 Potential energy is the energy of an object due to an applied force, while kinetic energy is energy stored after the applied force. 0 Potential energy is the energy stored after an applied force, while kinetic energy is the energy used from the applied force. \fBetween which two points is the substance changing from a liquid to a gas? D E Temperature ('C) B C A Time (minutes) O A and B O C and D O D and E O E and FA gasoline-powered generator is used to provide lighting for a house. Which sequence best describes the conversion of energy? O Mechanical, thermal, electrical, light O electrical, chemical, mechanical, light O chemical, mechanical, electrical, light O thermal, mechanical, chemical, lightA bicyclist at the top of a hill begins to mast without pedaling. The bicycle speeds up as it descends to the bottom of the hill and then slows down as it continues up a second hill, where it stops. Which of these sequences best describes the energy change of the bicycle from the top of the hill until it stops? 0 potential kinetic kinetic O kinetic 7 potential 7 potential 0 kinetic potential kinetic potential kinetic potential r'UD-DlDLI: I'UIN I D: 3.00 The chart below shows temperature readings recorded every minute while a substance was being heated at a constant rate. The material was a solid before heating and hot liquid after 7 minules of heating. n\" Based on the data, at what temperature did a phase change take place? 0 35C (0 53C 0 53C 0 55C The diagram below shows a pinwheel rotating above a lit candle. The arrows indicate the direction of air ow. Which energy transformation is best shown in this diagram? @ heat to mechanical O mechanical to light 0 sound to heat 0 heat to sound Base your answers to the questions on the diagram below, which shows two insulated Styrofoam cups of water connected by an aluminum bar. The thermometers show the temperature of the water in cup A and cup B at the beginning of the heat-ow experiment. Over the next 15 minutes, which changes would most likely occur? 0 The temperature in cup Awill decrease and the temperature in cup B will increase. (9 The temperature in cup A will decrease and the temperature in cup B will decrease. O The temperature in cup Awill increase and the temperature in cup B will increase. 0 The temperature in cup Awill increase and the temperature in cup B will decrease. The diagram below represents a thermometer. F 30 7 Glass 60 tube so 40 3 liquid an alcohol in tube 10 0 Which principle best explains how this thermometer works? 0 A liquid changes to a gas when heated. O A gas changes to a liquid when heated. (ii A liquid expands when heated and contracts when cooled. 0 A liquid contracts when heated and expands when cooled. Jalanda performs an experiment on the transfer of thermal energy. She heats water to 50C and then carefully pours the water into two cups. One cup is made of plastic foam. The other cup is made of aluminum. Jalanda plaoes a thermometer in each cup and records the temperature of the water every 5 minutes. Predict the temperature trends that Jalanda will observe. Explain your prediction. B I L! E E Both poiential and kinetic energy can be observed at this skate park. identify which skater is displaying kinetic energy and explain why. I Q E E The usage of electricity in the United States has increased dramatically over the past 20 years. Most of the electricity is currently produced by burning fossil fuels. State one reason for the increased usage in electricity and describe a strategy to reduce the amount of fossil fuels people use in the United States. B I H 55 E
