Forms of Energy Today’s Topic: What are the different forms of energy?

We will look at: The relationship between energy and work Types of energy How energy can change forms

Intro Activity: ABC Word Splash You will be given 2 minutes to write down as many words (beginning with the letters of the alphabet) that come to mind when you think of ENERGY. Go! Now, you will be given 2 minutes to compare your list with the list of your lab members. Add any new words discussed.

Things to know before we start: The world is full of energy Every thing that you do or see requires or is a product of energy Without energy, living things could not survive.

How does this picture relate to energy?

How does this picture relate to energy?

How does this picture relate to energy?

How does these pictures relate to energy?

Energy and Work Remember, work requires a force and a distance Energy is the ability to do work or the ability to cause a change Whenever work is done, energy is transformed or transferred Ex. Whenever you stretch a slingshot back, you do work and you transfer energy from your body to the elastic band.

Energy and Work Energy is measured in joules. Because energy is a measure of the ability to do work, energy and work are expressed in the same unit. Work requires an object to change its motion; however, energy can be present in an object when nothing is happening at all.

Types of Energy Mechanical Energy (kinetic & potential) Heat Energy Chemical Energy Electromagnetic Energy Nuclear Energy Light Energy Sound Energy Electrical Energy Magnetism

Mechanical Energy Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both. Clipart credits: http://www.eschooltoday.com/

Kinetic and Potential Energy Kinetic energy is the energy that a moving object possesses. Ex. A hammer pushing in a nail Potential energy is stored energy due to position. Ex. Dynamite before it explodes

Clipart credits: http://www. physicsclassroom

Potential Energy Gravitational potential energy: Energy that is stored by objects that are above Earth’s surface Elastic potential energy: Energy stored by an object that can stretch or shrink

Heat Energy Results from the motion of molecules Anything that produces heat is said to have heat energy. Ex. Heat due to friction- rubbing your hands together Ex. A heater

Chemical Energy The energy required to bond atoms together. When you break these bonds, the energy is released. Ex. Digestion Ex. When a car burns gasoline Clipart credits: http://physics.phillipmartin.info/physics_electromagnetic_spectrum.htm

Electromagnetic Energy Energy that comes from space (waves) Ex. The sun’s rays producing light, X-rays, and UV rays. Ex. Asphalt on a hot summer day is hotter where the light shines. Clipart credits: http://physics.phillipmartin.info/physics_electromagnetic_spectrum.htm

Nuclear Energy This energy is derived from the forces that holds atoms together (fusion). Fusion (nuclear energy) is what gives the sun its energy. When nuclear bonds break (fission) and atoms decay, nuclear energy is released and converted to heat, which helps to warm the earth. Ex. Atomic bomb

Electrical Energy Moving electrons Ex. Outlets, tv’s, lights, lightning Clipart credits: http://www.clipartpanda.com/clipart_images/electricity-64880922

Sound Energy Sound waves Ex. Music, noise

Light Energy Anything that produces light Ex. Lightning, sparklers

Magnetism The attraction or repulsion of an object due to its magnetic field. Ex. Electromagnet, bar magnet

Credits http://www.clipartpanda.com/clipart_images/electricity-64880922 http://physics.phillipmartin.info/physics_electromagnetic_spectrum.htm http://www.physicsclassroom.com/class/energy/Lesson-1/Potential-Energy http://openclipart.org http://www.eschooltoday.com/