Agenda Current Events Catapult Project Upcoming Test Lesson

Agenda • Current Events • Catapult Project • Upcoming Test • Lesson on Energy

Bellwork • What is the difference between potential energy and kinetic energy? Give one example for each type of energy.

Nature of Energy

Next Generation Science Standards • MS-PS 3 -1. Construct and interpret graphical displays of data to describe the relationships of kinetic energy to the mass of an object and to the speed of an object.

Objectives Content Objectives • • Differentiate between Kinetic Energy and Potential Energy. Identify the different types of potential energy Language Objectives • • • Define energy, kinetic energy, and potential energy. List the types of potential energy and its definition. Using the sentence frame, give one example Kinetic and Potential Energy: “One example of Kinetic Energy is _______. This is an example of KE because _______. One example of Potential Energy is ______. This is an example of PE because ________.

Vocabulary • Energy: the ability to do work • Kinetic Energy: energy in the form of motion • Potential Energy: energy that is stored

Types of Energy: • Electrical Energy • Chemical Energy • Thermal Energy • Radiant Energy

Kinetic Energy • Kinetic Energy depends on mass and velocity of a moving object. • Example: Going down a slide

Potential Energy • Example: waiting on top of the slide

• Stored energy • Not moving • Increases based on position/height • Ex. Top of a rollercoaster, tree branch about to fall • Types of energy • Transforms into other types of energy • Energy of motion • Increases as motion increases • Ex. Car driving fast, a motor spinning, someone running

• Kinetic Energy: energy in the form of motion. • Potential Energy: stored energy. • Chemical Potential Energy: potential energy stored in chemical bonds. • Elastic Potential Energy: energy stored by something that can be stretched or compressed. • Gravitational Potential Energy: energy stored in an object that has the potential to fall.

Mostly potential energy. Losing potential energy and gaining kinetic energy. Mostly kinetic energy. Losing kinetic energy and gaining potential energy.

P. E. K. E. P. E. K. E.

Units of Energy • Energy is expressed in Joules of “J”.

Formula for Kinetic Energy

Let’s Try! • Calculate the kinetic energy of a car which has a mass of 1000 kg and is moving at a rate of 20 m/s. • Use the formula to help you. • Remember to follow the order of operation G. E. M. D. A. S or P. E. M. D. A. S

Formula for Potential Energy • PE = mass x gravitational acceleration (9. 8 m/s 2) x height OR Weight X Height

Let’s Try! • There is a bell at the top of a tower that is 45 m high. The bell weighs 190 N. The bell has ______ energy. Calculate it.

Types of Potential Energy: • Elastic Potential Energy: Example: rubber band or spring • Chemical Potential Energy: Example: a glass of milk has CPE until you drink it then calories are used as energy for your body. • Gravitational Potential Energy: Example: A ball on the edge of a table has GPE.

Law of Conservation of Energy • Energy cannot be created or destroyed, but only changes from one form into another.

Homework • You are going to do a research on Law of Conservation of Energy. • You are going to look for one example and illustrate it on the following template. • You must have three scenes/illustration that shows the Law of Conservation of Energy. • Example: Playing pool • When you are done, you are going to complete the template and paste it into your notebook

Exit Cards! Tweet about it! • @put your full name • #Energy • Use one of the sentence starters to complete your exit card. • You will not leave unless it is completed