February 8th and 9th Unit 6: Energy Transformations Knowledgeable Objective(s): SWBAT differentiate between potential and kinetic energy. SWBAT identify where the greatest/least potential and kinetic energy occurs on a diagram. Relevance: Understanding potential and kinetic energy and how it is present in our daily lives adds more understanding to the way our world works. Do Now: Page 221 in textbook MATERIALS NEEDED: Pencil Unit 6, Day 1 Packet Agenda

Paige Keely Science Probe 5 min

Paige Keely Science Probe 5 min Answer/Discussion The best answer is…. Alan The ball has energy when it is moving and not moving. Objects can have energy when they are moving, such as the moving soccer ball. They also can have energy when they are not moving. The big idea is that energy is the ability to change an object in some way.

BrainPop Video Potential Kinetic moving mass Questions: _________ energy is stored energy that an object has because of its position or condition. _________ energy is the energy an object has because of its motion. Only __________ objects have kinetic energy. The more __________ an object has, the more potential energy it has. http://www.brainpop.com/science/energy/potentialenergy/ Potential Kinetic moving mass

Energy Energy is a property of matter, and all matter has it. Energy is the ability to do work. Electrical Energy Light Energy Nuclear Energy Sound Energy Thermal Energy Mechanical Energy

The Law of Conservation of Energy Energy cannot be created or destroyed. It is only transferred.

Mechanical Energy Today we’re going to focus on two kinds of mechanical energy – potential and kinetic. Potential Energy Kinetic Energy

Potential Energy Potential Energy Energy that is stored in a system, (i.e. not moving). Affected by the height and mass of the object. Potential Energy Any object that is at rest or has the potential to move. Any object that is in motion. (i.e. any object that has kinetic energy.)

Gravitational Potential Energy Gravitational potential energy is the stored energy given to an object that has been lifted into the air against the force of gravity Can you think of other examples?

Potential Energy

Turn and Talk What two things determine the amount of potential energy an object has?

Kinetic Energy Kinetic Energy The energy in a moving object. Affected by the mass and speed of the object. Kinetic Energy Any object that is in motion. Any object that is at rest, not moving. (i.e. any object that has potential energy.

Energy Transfers Energy cannot be created or destroyed. (Law of Conservation of Energy) Objects always have potential or kinetic energy, or both! They can be transferred from one to the other.

Energy Transfers Think about a book falling off a shelf. The books on the shelf have potential energy. As the books fall, the potential energy transfers to kinetic energy. The books on the ground have potential energy again.

Gravitational Potential Energy Energy Transfers Paint can example http://www.classzone.com/books/ml_science_share/vis_sim/mem05_pg69_potential/mem05_pg69_potential.html Gravitational Potential Energy

Pendulum Swinging How can a pendulum swinging be an example of potential/kinetic energy transfer? POTENTIAL ENERGY POTENTIAL ENERGY KINETIC ENERGY

Match ‘em Up! Potential Energy Kinetic Energy 30 sec! Potential Energy The energy in a moving object. Kinetic Energy Energy cannot be created or destroyed. The Law of Conservation of energy The stored energy in an object at rest.

How are potential and kinetic energy different? Stop and Jot How are potential and kinetic energy different?

Watch out! Energy is not just in living things – energy is in everything! Energy is present even if an object is not moving. There is a fixed amount of energy taking place at a time – it is transferred. Objects can have both potential and kinetic energy at the same time.

Word Scramble Challenge! 30 sec! ENERGY Definition: The ability to do work. {examples: mechanical, potential, chemical, kinetic, etc.} YERENG Definition: The ability to do work. {examples: mechanical, potential, chemical, kinetic, etc.}

What is the law of conservation of energy? Turn and Talk What is the law of conservation of energy?

Greatest/Least Potential and Kinetic Energy The amount of potential energy an object has depends on its mass and height. The higher an object is, the more potential energy it has. Similarly, if we have two objects at the same height, the one with more mass will have more potential energy than the one with less mass.

Greatest/Least Potential and Kinetic Energy The amount of kinetic energy an object has depends on its mass and speed.

What two things determine the amount of kinetic energy? Think-Pair-Share What two things determine the amount of kinetic energy?

https://phet.colorado.edu/en/simulation/energy-skate-park Energy Skate Park https://phet.colorado.edu/en/simulation/energy-skate-park

Greatest/Least Potential and Kinetic Energy http://www.pbslearningmedia.org/asset/mck05_int_rollercoaster/?utm_source=teachersdomain_redirect/asset/mck05_int_rollercoaster/utm_medium=teachersdomain/asset/mck05_int_rollercoaster/utm_campaign=td_redirects

Greatest/Least Potential and Kinetic Energy Let’s fill in the diagram on your guided notes. Greatest potential energy Mass and height Greatest kinetic energy Speed and mass

Think-Pair-Share How does the law of conservation of energy apply to potential and kinetic energy?

Guided Practice 17 min What type of energy is present in the ball as it is being held before it drops? What happens to the potential and kinetic energy as the ball is dropped? What type of energy is present in the ball as it hits the floor? What happens to the total mechanical energy at all points during the trial? At what point did the ball have the greatest kinetic energy? In which trial did the ball have the greatest potential energy? Why? In which trial did the ball have the greatest kinetic energy as it hit the floor? How do you know? In which trial did the ball bounce highest after it hit the ground? Why do you think that happened? For Trials 1 and 2, compare the potential energy at a height of 1 meter.

Independent Practice 20 min Complete the independent practice about potential and kinetic energy During this time you should be working silently and independently. If you have a question, please raise your hand silently at your seat. During independent practice scholars should be completely silent and working individually. It’s okay if scholars are not given the full 25 minutes to work – just give them as much time is available. Please leave about 5 minutes of class for the exit ticket and to pack up.

Exit Ticket Complete the exit ticket. Turn in as you leave. You may pack up your things.

STOP Cards S Summarize: Summarize the day’s lesson and what we learned. T Trait: What IB trait relates to the lesson? O Objective: Re-state in your own words and say whether or not we met that objective for the day. P Purpose: What was the purpose of this lesson?