Do Now 4/23/14 1.Describe what comes to mind when you think of energy. 2.How do you get energy? 3.Where do you see energy around you?

Today, we will be able to… Define the different forms of energy (kinetic, potential, chemical, thermal) and explain the law of conservation of energy

Agenda Do Now10 min. The Brownie Dilemma5 min. Energy and Its Types15 min. Heat Transfer Passage10 min. Heat Transfer Stations25 min. Independent Practice10 min. Exit Ticket10 min.

The Brownie Dilemma

Agenda Do Now10 min. The Brownie Dilemma5 min. Energy and Its Types15 min. Heat Transfer Passage10 min. Heat Transfer Stations25 min. Independent Practice10 min. Exit Ticket10 min.

ENERGY Ability to generate heat or do work Heat – energy transferred when a temperature change occurs Work – energy transferred when force is applied to cause a change in position Measured in Joules (J)

Kinetic Energy Energy of motion Anything that is moving has KINETIC ENERGY

Potential Energy Energy stored because of physical position or chemical composition Potential energy is converted to kinetic when stored energy is released

Chemical Potential Energy Energy stored in chemical bonds Amount of chemical potential energy is determined by its composition Kinds and positions of atoms Kinds and numbers of chemical bonds

Thermal Energy Energy due to random movement of particles Temperature – measurement of the average ___________ energy of particles What does a change in temperature mean?

Law of Conservation of Energy Energy cannot be created nor destroyed, only transformed There is a fixed amount of energy in the universe Initial Energy = Final Energy

Observable Forms of Energy Heat Light Motion Sound Electricity

Agenda Do Now10 min. The Brownie Dilemma5 min. Energy and Its Types15 min. Heat Transfer Passage10 min. Heat Transfer Stations25 min. Independent Practice10 min. Exit Ticket10 min.

How can energy be transferred? Read the Comparing Models Passage and answer questions independently. 7 minutes

How can energy be transferred? Conduction: collision of particles Convection: flow of fluids at different temperatures Radiation: due to electromagnetic waves

SHOW ME YOUR MOVES Conduction, Convection or Radiation?

Agenda Do Now10 min. The Brownie Dilemma5 min. Energy and Its Types15 min. Heat Transfer Passage10 min. Heat Transfer Stations25 min. Independent Practice10 min. Exit Ticket10 min.

Agenda Do Now10 min. The Brownie Dilemma5 min. Energy and Its Types15 min. Heat Transfer Passage10 min. Heat Transfer Stations25 min. Independent Practice10 min. Exit Ticket10 min.

Independent Practice 1.What is chemical potential energy? 2.Where is energy stored in chemical compounds? 3.Describe the Law of Conservation of Energy. 4.Describe a real-world example of the Law of Conservation of Energy that applies to chemistry. 5.List three real-world examples of each type of heat transfer (conduction, convection, and radiation).

Agenda Do Now10 min. The Brownie Dilemma5 min. Energy and Its Types15 min. Heat Transfer Passage10 min. Heat Transfer Stations25 min. Independent Practice10 min. Exit Ticket10 min.

Exit Ticket 1. Which of the following best describes the potential and kinetic energy changes as a car drives to the top of a hill and stops? A.Potential energy increases, kinetic energy decreases B.Potential energy decreases, kinetic energy increases C.No energy change takes place D.Both potential and kinetic energy decrease 2. An inventor claims to have created an internal combustion engine that converts 100 kJ of chemical energy from diesel fuel to 140 kJ of mechanical energy. This claim violates the law of the conservation of – A.Momentum. B.Inertia. C.Mass. D.Energy. 3. A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door to his hand by— A.Conduction B.Convection C.Radiation D.Compression 4. Which of these is the best example of heat transfer by radiation? A.A satellite is warmed by sunlight B.Butter melts on warm bread C.A ceiling fan cools a warm room D.Puddles of water cool a warm tile floor