Energy Unit Week 32 Directions 1.Prepare your desk for science. Science notebook 2.Use voice level 2 (conversation) to discuss the following: “What is energy? What are the various forms of energy? What are their definitions?”
Energy change something do work Energy is the ability to change something or do work – Work: Using force in order to move an object a certain distance makes matter move or change Energy is what makes matter move or change Types: Thermal, Electrical, Sound, Light
Targets & Warm Up Targets: Students will understand how thermal energy is transferred. Students will distinguish between conductors and insulators. Warm Up: What do you know about energy?
Table of Contents DateTitlePage Thermal Energy74 Once you are finished with the Table of Contents, go to page 73 and add the title and date to the top of the page.
Energy in Matter Rub your hands together. What happens? You just used energy to make heat
Energy in Matter The particles in matter are always moving. Why do particles move? – Because they have energy! Do all particles move in the same way? – As an object becomes hotter, its particles move faster – As an object becomes colder, its particles move slower
Thermal Energy Thermal energy is energy due to moving particles that make up matter. We feel the flow of thermal energy as heat.
How Does Heat Move? warm cool Thermal energy flows from something warm to something cool. heat The transfer of thermal energy between matter with different temperatures is heat. A heat source is anything that gives off energy that particles of matter can take in.
How Does Heat Move? Radiation Convection Conduction
Radiation The transmission of energy as light Objects that send out light also send out heat Can travel through matter or empty space
Radiation
Convection The transfer of heat by the circulation or movement of the heated parts of a liquid or gas – Heated air goes up (less dense) – Cooler air goes down (more dense)
Convection
Conduction The transfer of heat energy by one object touching another Occurs between two solids
This is a spatula that is used to cook food. Why does it have a wooden handle?
A Conduction Experiment (pg. 354)
Conductors vs. Insulators (pg. 355) Conductor: A material that readily allows heat to move Insulator: A material that limits the amount of heat that passes through it
Conductors Copper Aluminum Gold Silver Steel Iron Water
Insulators Glass Ceramic Plastic Rubber Wood Cotton Paper
StudyJams Video s/science/energy-light-sound/heat.htm Pay attention to: Three types of heat energy transfer Conductors & insulators
Reflection Questions Think about the items in your kitchen. What are some conductors you have? What are some insulators you have? How do you use them?
Targets (Revisited) Students will understand how thermal energy is transferred. Students will distinguish between conductors and insulators.
Homework SubjectHomeworkDue Date ScienceHeat Energy wkshtWednesday