Energy Machines and Motion Underlying Themes of the Module Different forms of energy; how forces do work to change energy from one form to another; how machines reduce the force needed to do work; and how forces change the motion of objects Energy Machines and Motion Module Implementation Course Participant Objectives • • • • • • • Obtain a working knowledge of the conceptual sequence and structure of the EMM module. Expand understanding of the concepts covered in the module. Gain proficiency in working with the materials in the EMM kit. Become familiar with the module's lessons. Experience a wide range of inquiries using authentic student inquiries. Build upon existing knowledge and expand knowledge off energy, machines, and motion. Develop strategies to successfully implement the module. Module Implementation Course Agenda/Schedule Day 1 Session 1 – Introduction and Overview of the program Introduction to the kit, materials, role of science notebook, Pre-assessment Session 2 – Lesson 1: Circuit of Inquiries Session 3 – Energy: L2, 3* & 4 Session 4 – Forces: L5 & 6 Module Implementation Course Agenda/Schedule Day Two Session 5 – Forces, Motors, and Work: L 7 & 8, 9* Session 6 – Introduction to Machines: L 11 Session 7 – Machines Concluded: L12, 13, 14*, 15* Session 8 – Introduction to Motion: 18 Module Implementation Course Agenda/Schedule Day Three Session 9 – Motion continued: L 19 Session 10 – Motion concluded: L 20 & 21 Session 11 – Assessments in EMM: L 10, 16, 17 Using the Readers in EMM Session 12 – Post Assessment, strategies for implementing the module, concluding business, Wrap-up and Evaluation Part 1 Energy Lesson 1 Circuit of Inquiries—A Preassessment Students complete a circuit of eight inquiries that introduce many of the concepts that they study during the module. Lesson 2 Making a Battery Concepts: Battery structure and function; supply of energy by a chemical reaction; limited “battery life” Students: • Build a copper-zinc electrode battery • Observe and describe how the battery works Lesson 3 Rechargeable Batteries Concepts: Batteries can store energy; energy transformation; different devices use energy at different rates Students: • Test and use a rechargeable battery to store energy • Use the battery to power devices and determine the energy changes involved. Lesson 4 Storing and Using Energy in a Battery Concept: Recharging time Students: • Investigate and graph the relationship between battery charging time and energy storage Lesson 5 Introduction to Forces Concepts: Forces as pushing or pulling; units of force (newtons); the difference and relationship between mass and weight Students: • Share ideas about forces • Use a spring scale to measure elastic forces (when stretching a rubber band) • Devise an inquiry to investigate the relationship between the weight and mass of an object. Lesson 6 The Force of Friction Concepts: Friction force; the relationship between friction and surface type Students: • Observe and measure sliding friction by dragging a wooden block over a variety of surfaces • Measure the force of friction on loads with different weights and surface areas (in contact with a surface) Lesson 7 The Force Exerted by a Motor Concepts: Battery arrangement and electric motor performance; forces exerted by electric motors Students • Design and conduct an experiment to determine the operating conditions that facilitate maximum force from a motor. Lesson 8 Work and the Motor Concepts: Work as force x distance; units of work--joules and newton-meters Students • Use force and distance measurements to calculate work done by a motor Lesson 9 Power of a Motor Concepts: Power as work/time; units of power—watts; power as a measure of the rate at which energy transformations take place. Students • Determine the power of a motor powered by different numbers of batteries Lesson 10 Assessing What You Know Assessment for Part 1 of module consists of • Performance assessment in which students analyze the energy transformations that occur when a mass attached to a motor by string falls. • Written test composed of multiple choice and short answer questions. Need Grabber photo for this lesson Part 2 Machines Lesson 11 The Inclined Plane Concepts: Measuring work when lifting; using machines to reduce effort; effect of friction on work Students: • Measure forces on a cart on an inclined plane • Measure work on a cart on an inclined plane • Compare the work done by lifting and raising the same load on an inclined plane Lesson 12 The Pulley Concept: A pulley as a machine Students: • Explore the use of pulleys • Calculate the work done by different pulley arrangements Lesson 13 The Lever Concepts: The lever as a machine; torque and balanced levers Students: • Construct a general rule for balancing levers • Measure the force (and calculate the work) needed to lift objects using levers Lesson 14 The Mechanical Advantage of Machines Concepts: Mechanical advantage (load force: effort force); effect of friction on mechanical advantage Students: • Calculate and compare the mechanical advantage (MA) of different machines and compare the calculated MA with the actual MA. Lesson 15 The Efficiency of Machines Concepts: Efficiency (work output: work input) Students: • Calculate the efficiency of inclined plane and pulley systems Lesson 16 Machines Assessment—A Technological Design Challenge • Embedded performance based assessment in which students are challenged to use a combination of a motor and a machine to lift a load. They are then expected to evaluate their design. Part 3 Motion Lesson 17 Introducing the Anchor Activity Concepts: Brainstorming; technological solutions to everyday needs; research & development utilizing multiple resources; communication of ideas Students: • Research a machine and create a presentation describing its construction and how it works. • Include information on its use of energy, the forces involved, and motion that occurs when the device operates. Lesson 18 Motion of a Fan Car Concepts: Speed; unbalanced forces; and acceleration Students: • Use a battery powered fan car to investigate the effect of a constant force on an object Lesson 19 Motion of a Mousetrap Car Concepts: Speed; unbalanced forces; acceleration; conservation of energy in a closed system Students • Observe and measure changes in the speed of a mousetrap-powered car • Compare the behavior of a mousetrap car with that of a • fan-powered car Lessons 20-21 The Roller Coaster and Motion on a Roller Coaster Concepts: Kinetic energy, potential energy (reviews a wide range of earlier concepts) Students: • Build a model roller coaster • Predict, observe, and describe the motion of a model roller coaster car • Measure the speed of a model roller coaster car Lesson 22 The Anchor Activity • Final assessment for the module. Students present the research they began in Lesson 17.