Don t Change Topic: Changes in Matter (middle/high school chemistry)

Transcription

1 Don t Change Topic: Changes in Matter (middle/high school chemistry) by Lodge

2 Don t Change If you follow the law...no mass will be destroyed Things will just change...nothing added oh boy Such are Physical changes like state or form r chemical ones we ve never seen before Like how rust comes from iron ore Chorus: Don t change your chemical properties Though the world will conserve mass and energy properly Change your physical properties I know it takes a change in energy... A change requires energy Ice in my left hand, yeah its got to melt, Endothermic takes heat form something else Now exothermic is like a tiny fire Giving off heat, come on don t make me a liar It s the water to ice that I admire Get ya some kinetic...particles in constant motion Talk about potential...releasing energy when bonds are broken... Electromagnetic invisible waves and sunlight that keep going... elps photosynthesis keep things growing If you follow the law, no energy will be lost Electrical electrons - just moving across Got a steaming cup of coffee in my right hand The temperature s hot...thermal energy adds All the cups together...made from the can

3 Student Lyric Guide

4 Name: Changes in Matter Don t Change If you follow the law no mass will be destroyed Things will just change nothing added, oh boy Define Law of Conservation of Mass C + eat Methane Molecule 2 xygen Carbon Dioxide Molecules Molecule 2 Water Molecules C Total ydrogen Atoms = Total Carbon Atoms = Total xygen Atoms = Total ydrogen Atoms = Total Carbon Atoms = Total xygen Atoms = Such are Physical changes like state or form Define physical property: Example of a change in state: Example of a change in form: r chemical ones we ve never seen before Define chemical properties:

5 Like how rust comes from iron ore is required for iron to produce rust. Why don t cars rust while they are sitting out in the parking lot? The scientific name for rust is Don t change your chemical properties What would happen if our chemical properties changed? Though the world will conserve mass and energy properly If you did change your chemical properties would mass or energy be destroyed? Why or why not? Change your physical properties What are your physical properties and which of them can change? I know it takes a change in energy A change requires energy What type of energy is required to change skin color? Ice in my left hand, yeah its got to melt, Why does ice melt if it s in your hand? Endothermic takes heat form something else Define Endothermic: Why is ice in your hand considered an endothermic change?

6 Now exothermic is like a tiny fire Define and exothermic change: Giving off heat, come on don t make me a liar It s the water to ice that I admire Examples of exothermic chemical and physical changes: Get ya some kinetic particles in constant motion Define kinetic energy: Talk about potential releasing energy when bonds are broken Define potential energy: Electromagnetic invisible waves and sunlight that keep going Define Electromagnetic energy: is an example of electromagnetic energy. elps photosynthesis keep things growing ow are photosynthesis and electromagnetic energy connected? Write down the equation for photosynthesis Which part of the equation requires sunlight and why? If you follow the law, no energy will be lost Define Law of Conservation of Energy:

7 Electrical electrons - just moving across Define electrical energy: Complete the diagram below to illustrate sharing of electrons in a salt molecule: Na Cl Got a steaming cup of coffee in my right hand The temperature s hot thermal energy adds All the cups together made from the can Define thermal energy: Which of the following has more thermal energy and why? A. 1 cup: 100ºF B. 6 cups: 100ºF

8 Teacher Key

9 Name: KEY Don t Change If you follow the law no mass will be destroyed Things will just change nothing added, oh boy - Define Law of Conservation of Mass matter is never created or destroyed in any physical or chemical change. ften called the law of conservation of matter C + eat Methane Molecule 2 xygen Carbon Dioxide Molecules Molecule 2 Water Molecules Total ydrogen Atoms = 4 Total ydrogen Atoms = 4 Total Carbon Atoms = 1 Total Carbon Atoms = 1 Total xygen Atoms = 4 Total xygen Atoms = 4 C Such are Physical changes like state or form Define physical property: characteristic of a pure substance that can be observed without changing it into another substance. Color, luster, hardness, texture. State: solid liquid or gas Form: Shape Example of a change in state: Water to ice Example of a change in form: crushing an empty coke can, metal slinky. r chemical ones we ve never seen before Define chemical properties: the potential that a substance has to create other substances through a chemical reaction. Like how rust comes from iron ore is required for iron to produce rust. xygen. Why don t cars rust while they are sitting out in the parking lot? Paint protects the metal (iron) when paint comes off rust forms.

10 The scientific name for rust is iron oxide. Don t change your chemical properties What would happen if our chemical properties changed? The way you react with the world would change. For example: if students were not smelly after gym class, they would have more friends. Though the world will conserve mass and energy properly If you did change your chemical properties would mass or energy be destroyed? Why or why not? No mass or energy is destroyed when chemical or physical changes take place. Change your physical properties What are your physical properties and which of them can change? Skin color, hair color, presence or absence of hair, size, shape, etc I know it takes a change in energy A change requires energy What type of energy is required to change skin color? Skin color can change but it requires electromagnetic (sunlight) energy to change. Ice in my left hand, yeah its got to melt, Why does ice melt if it s in your hand? It is absorbing the heat from your hand. Endothermic takes heat form something else Define Endothermic: A change in which energy is absorbed. Why is ice in your hand considered an endothermic change? Ice requires heat from another source (absorption of heat) to change. LAB: Show an endothermic change Alka seltzer in water. Now exothermic s like a tiny fire Define and exothermic change: Change in matter that releases heat energy Giving off heat, come on don t make me a liar It s the water to ice that I admire

11 Examples of exothermic chemical and physical changes: Fire giving off heat (chemical), ice melting to water (physical) Get ya some kinetic particles in constant motion Define kinetic energy: energy of matter in motion Talk about potential releasing energy when bonds are broken Define potential energy: energy an object has due to it s position Electromagnetic invisible waves and sunlight that keep going Define Electromagnetic energy: energy that travels through space as invisible waves (sunlight) is an example of electromagnetic energy. elps photosynthesis keep things growing ow are photosynthesis and electromagnetic energy connected? Electromagnetic energy (sunlight) is required for photosynthesis to occur. Write down the equation for photosynthesis Carbon dioxide plus water oxygen and sugar Which part of the equation requires sunlight? The left side of the equation (reactants) because without sunlight, no chemical reaction will occur. If you follow the law, no energy will be lost Define Law of Conservation of Energy: When there is a physical or chemical change the uses energy, there is no energy created or lost. Electrical electrons - just moving across Define electrical energy: Electrons (charged particles) moving from one place to another Complete the diagram below to illustrate sharing of electrons in a salt molecule: Na Cl Got a steaming cup of coffee in my right hand The temperature s hot thermal energy adds All the cups together made from the can Define thermal energy: total energy of all the particles in an object.

12 Which of the following has more thermal energy and why? B. There are more particles in the 6 cups than there are in the single cup. A. 1 cup: 100 degrees B. 6 cups: 100 degrees

13 Music Video Extension Activity 1. and out or project the lyrics and read them out loud and discuss their meaning 2. Play the song for the students, multiple times, encouraging them to sing along 3. Use the student lyric guide in place of, or to supplement class notes 4. Allow students class time, in small groups, to act out a portion of the song 5. Film the student groups singing/acting out the song