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Do Now: Look at the bottle of clear solution on my desk, what do you think it is? Does it have ENERGY? Do Now: Focused Free Write Look at the bottle of.

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Presentation on theme: "Do Now: Look at the bottle of clear solution on my desk, what do you think it is? Does it have ENERGY? Do Now: Focused Free Write Look at the bottle of."— Presentation transcript:

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2 Do Now: Look at the bottle of clear solution on my desk, what do you think it is? Does it have ENERGY? Do Now: Focused Free Write Look at the bottle of clear solution on my desk, what do you think it is? Does it have ENERGY?

3 Do Now: Do Now: Take a lab from the Do Now Desk Get into your groups from last time! Get that data!

4 Do Now: Copy HW & Lab Pass UP -Pass up Water Shoe box lab Monday: No HW Tuesday: Energy Homework Wednesday: Energy Transfer Practice Question in Packet on Page 7 Thursday: Specific Heat WS Friday: No Homework Extra Help: Thursday Morning

5 Unit 1: ENERGY 4 Stop Monkey-N-ing around and Go Green already! P.S. I’m Mookie the Monkey

6 What is ENERGY? Energy is the ability to do _______ Work 5

7 Work occurs when a _____ causes an object to _____ in the same direction as the force. move force 6

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9 FORMS OF ENERGY Both basic states of energy, Kinetic and potential, can exist in many forms!

10 The total ________ energy of the particles in matter. (molecular motion) Kinetic THERMAL (HEAT) 9

11 A type of mechanical energy. It is the energy produced when objects ________. Ex: tuning fork, bell vibrate SOUND 10

12 Energy with which ______ objects perform work. Ex: Wind, flowing water, using a hammer moving MECHANICAL 11

13 A form of energy produced by the ________ of ________ movement ELECTRICITY electrons 12

14 Energy STORED in chemical ____ that can be released. Ex: food, fossil fuels, battery acid bonds CHEMICAL 13

15 Stored energy due to a change in the shape of an object. Ex: _______________ A stretched rubber band STORED MECHANICAL ENERGY: 14

16 STORED MECHANICAL ENERGY: 15

17 A form of _______ energy that moves in a ______. Ex: lamp, stars radiant LIGHT wave 16

18 All forms of energy that come from the ______. SUN SOLAR ENERGY 17

19 Energy STORED in the ________ (center) of an atom. Ex: nuclear bombs nucleus NUCLEAR 18

20 Heat energy STORED within the _____. Ex: Volcanic eruptions, geysers Earth GEOTHERMAL (HEAT) 19

21 All forms of energy can be classified as Kinetic or potential. The two basic states of energy. So, what’s the difference? 20

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23

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25 1) Potential energy is stored energy due to and object’s _____________ Position POTENTIAL ENERGY 24

26 2) An object that is lifted from its position on Earth has __________ potential Energy which depends on ______ and mass gravitational POTENTIAL ENERGY height 25

27 3) Massive objects have _____ potential energy than less massive objects more POTENTIAL ENERGY 26

28 4) An object at a higher elevation will have _____ potential energy than an object at a lower elevation more POTENTIAL ENERGY 27

29 Do Now  Pass up procedure for your signed test  Take out Homework  Complete worksheet on Do Now desk

30 1)Kinetic is energy of ___________ Motion KINETIC ENERGY 29

31 2) Kinetic depends on the _____ and the _______ of an object. MASS KINETIC ENERGY SPEED 30

32 3) Faster objects have ____ kinetic energy than slower objects. More KINETIC ENERGY 31

33 REVIEW QUESTONS: A B C D WHICH SKIIER HAS THE GREATEST KINETIC ENERGY?

34 WHICH SKIIER HAS THE GREATEST POTENTIAL ENERGY? A B C D

35 Do you remember the LAW OF CONSERVATION OF MASS AND ENERGY? ENERGY TRANSFORMATIONS 34

36 Law of Conservation of ENERGY: (same for mass) Mass/ NRG ____________ Mass/ NRG ______________ Mass/ Energy can only __________ Can’t be made Can’t be destroyed Change form!!!

37 DURING ENERGY CHANGES, IF ONE BODYIS LOSING ENERGY, THE OTHER IS _______ ENERGY: THE WAVE LOSES ENERGY : THE SAND GAINS ENERGY Gaining

38 THE WAVE LOSES ENERGY : THE SAND GAINS ENERGY DURING ENERGY CHANGES, IF ONE BODYIS LOSING ENERGY THE OTHER IS GAINING ENERGY:

39 DURING ENERGY CHANGES THE TOTAL ENERGY REMAINS THE SAME ENERGY ALWAYS FLOWS FROM HIGH TO LOW (source to sink ) DURING ENERGY CHANGES THE TOTAL ENERGY REMAINS THE SAME ENERGY ALWAYS FLOWS FROM HIGH TO LOW (source to sink )

40 THE ENERGY WILL FLOW FROM: THE ENERGY WILL FLOW FROM: THE FLAME TO THE FINGER THE FLAME TO THE FINGER

41 ICE ENERGY WILL FLOW FROM THE FINGER TO THE ICE THE FINGER TO THE ICE

42 THE LIQUID LOSES ENERGY AS THE ICE GAINS ENERGY THE LIQUID LOSES ENERGY AS THE ICE GAINS ENERGY

43 WHEN WILL THE EXCHANGE OF ENERGY STOP? WHEN WILL THE EXCHANGE OF ENERGY STOP? WHEN EQUILIBRIUM IS REACHED WHEN EQUILIBRIUM IS REACHED THE LIQUID AND THE ICE REACH THE SAME TEMPERATURE THE LIQUID AND THE ICE REACH THE SAME TEMPERATURE

44 Very often during the energy transformation process, some ____ energy is produced due to friction. This is wasted energy and is lost to the environment. heat UNUSABLE ENERGY: 43

45 Example: A television changes electrical NRG into light and sound NRG ENERGY TRANSFORMATIONS 44

46 ENERGY TRANSFORMATIONS 45

47 Do Now  Turn to page 7 in your note packet  Take out “Energy HW”

48 Method’s of NRG transfer  1. __________________: Heated air rises through earth’s atmosphere.  2. __________________: An ice cube melts when dropped into a glass of warm water.  3. __________________: Light leaves the sun and 8 minutes later strikes earth.  4. __________________: You burn you tongue eating hot pizza.  5. __________________: Hot magma rises inside earth’s mantle, cool, and sinks.  6. __________________: A microwave oven heats soup.  7. __________________: A fireplace warming a room. Convection Radiation Conduction Convection Radiation Convection

49   A     B 

50

51

52 Methods of Energy Transfer

53 Energy moves from regions of _________ concentration to ________ concentrations of energy. high low 52

54 _______ To _______ Source sink

55 There are 3 methods of Energy Transfer  Radiation  ConDuction  ConVection

56 Con D uction

57 Explanation of Transfer D irect contact (touch) Molecule To Molecule

58 -Conduction is a form of heat transfer by direct _______ of molecules contact 57

59 -Conduction occurs fastest in _______ solids Best Medium for energy transfer 58

60 -_______ are the best conductors of he heat energy. metals 59

61 Examples  Touching a hot surface  Electricity

62 Do Now Take a Conduction lab & read:

63 Con ection

64 Explanation of Transfer Energy transfer Due to Density differences

65 -Convection is a form of heat transfer that occurs by up and down motions of a _______ due to differences in ______ fluid density 64

66 -occurs ONLY in _____ which are liquids and gases! fluids Best Medium for energy transfer 65

67 Examples  Hot air or water rising  Volcanoes  Lava lamp

68 convection

69  Radiatio

70 Explanation of Transfer Electromagnetic (EM) waves that move Through a vacuum (empty space)

71 -radiation is the transfer of heat in _____. waves 70

72 -Electromagnetic radiation travels at the speed of ______. light 71

73 Best Medium for energy transfer No medium needed

74 Examples Gamma X-rays UV Visible Infrared Microwave radio

75 Do Now: Name that type of heat transfer! Conduction! Convection! Radiation! 74

76 Do Now: Focused Free Write (No HW tonight) What is different about how each of the three popcorns? How were they made? Explain!

77 Do Now: In which direction does the air move?   A     B 

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79 Do Now: In which direction does the energy move?   A     B 

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81 Do Now: What will heat up faster  1. Or  2. Or  3. Or

82 1. HEAT: the energy of moving __________ particles HEAT NOTES 81

83 2. HOT OBJECTS contain __________ heat than cold ones more HEAT NOTES 82

84 3. All objects above __________ contain heat Absolute zero HEAT NOTES 83

85 4. Heat always flows from ______ objects to ______ objects until the objects reach _____ temperature. hotter HEAT NOTES cooler same 84

86 5. The greater the difference in temperature between the two objects, the _________ heat is transferred. faster HEAT NOTES 85

87 HOW IS HEAT TRANSFERRED BETWEEN OBJECTS? 86

88 Heat Transfer at Work

89 Name that type of heat transfer! Conduction! Convection! Radiation! 88

90 Do Now  Read the article about Latent Heat while I set up the Demo  I will collect both labs tomorrow!  Tomorrow report to large computer room in the Library

91 Heat Transfer across the globe  ooks/earth_science/terc/con tent/visualizations/es1705/e s1705page01.cfm ooks/earth_science/terc/con tent/visualizations/es1705/e s1705page01.cfm

92 Do Now: HW on Desk  Take a Lab from Do Now desk  Reflect on these two questions:  1) Would it take more energy to raise 5 g of water 5ºC or 20ºC?  2) Would it take more energy to raise 5 grams of water 10ºC or 100 grams of water 10ºC

93 Specific Heat Quantity of heat needed to raise One gram of any Substance by 1 degree Celsius

94 Specific Heat The higher the Specific heat… The more energy is needed to raise the temperature

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96 Measuring Specific Heat Energy can be measures in many different ways. Typical units include: ____________________, _________________, & ___________________ Joules Watts calories

97 The term “Joule” is named after English Scientist James Prescott Joule who lived from 1818 to He discovered that Heat is a type of Energy! 1,000 joules =1 kilojoule = 1 Btu

98 Do Now! Read the did you know and complete practice questions 1-10!

99 1.What substance has the highest specific heat? Use your Reference Tables Liquid water 4.18 Joules/gramºC

100 2. Why do metals have low specific heats?  They are solid

101 3. Why are pans made of metals with low specific heats ? Because metals are good Conductors And have low specific heats. Therefore they will heat up quickly and cook your food faster.

102 water 4. Which would Take more energy to raise its Temperature, water Or land?

103 land 5. Which would Heat up and cool off Faster, land or water?

104 Water (liquid) = 4.18 Iron (Fe) = 0.45 Copper (Cu) = Which of these three substances will heat up fastest? Copper because it has the lowest specific heat

105 Do Now: 1) Describe the energy exchange occurs when liquid water at 0°C turns to ice at 0°C? a.The water loses energy b.The air around the water loses energy c.The ice gains energy. d.The air and the water both gain energy. 2) As heat energy is added to an open container of boiling water, the temperature of the boiling water will.. a. decrease b. increase c. remain the same

106 7. Which material would require the greatest amount of heat energy to raise its temperature from 5 0 C to 10 0 C? A. 10 grams of granite B. 10 grams of ice C. 10 grams of lead D. 10 grams of iron

107 8. Which pan would you use if you wanted to cook your food quickly? copperiron Cp = 0.38 Cp = 0.45

108 9. Which material would require the greatest amount of heat energy to raise its temperature from 5 0 C to 10 0 C? A. granite B. ice C. lead D. iron

109 10. Calculate how many joules would be required to raise 3 grams of water from 50 C to 65 C. 3g x15 ˚C x 4.18 J =188.1j g˚C

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112 Do Now: Copy HW & Green house ditto on desk -Pass up Phase change lab Monday: Study for exam Tuesday: Review book read pages 105 to 109 Answer Questions on page 110 Wednesday: Review Book read pages 116 to 118 Questions 39 to 48 on 119 Thursday: Insolation Worksheet Friday: No HW Extra Help: Monday after school

113 Do Now: Take out review sheet

114 Do Now: Copy HW & Lab Pass UP -Pass up signed progress report Monday: Specific Heat HW Tuesday: Electromagnetic Spectrum HW Wednesday: Electromagnetic Spectrum WS #1 Thursday: Wave WS & Study Friday: Quiz Today Extra Help: Tuesday Morning

115 Do Now: Focused Free Write What is different about how each of the three popcorns? How were they made? Explain!

116 Do Now: - Take a lab from the do now desk -Take out last night’s HW -Complete the FOCUSED FREE WRITE on the front page of the lab: Which spoon would heat up faster when placed in a bowl of very hot soup, a wooden spoon or a metal spoon? Explain your answer in terms of specific heat, which spoon has the lower specific heat and why?

117 Take out your concept map and reading from last nights homework

118 Find the symbol on the Top right corner of your Lab. Time to get in Lab Groups, Listen for directions.. Heat Transfer through radiation Lab

119 Directions: -You will work in groups of four to complete this Lab. -If your paper has an “A” in the top right corner, you and your partner will be monitoring the SAND AND WATER cups. -If your paper has a “B” in the top right corner, you and your partner will be monitoring the BLACK AND SILVER cans. -Both groups are responsible for both sets of data so it is important to communicate to each other.

120 In the space provided on your lab, predict what which cup will heat up fastest, the cup of sand or the cup of water? Explain your choice! Make a Prediction

121 In the space provided on your lab, predict what which cup will heat up fastest, the black cup or the silver cup? Explain your choice! Make a Prediction

122 -One partner is responsible for turning on the heat lamp -The other partner should take a temperature reading for each cup for time 0 in Degrees Celsius Prepare to Begin

123 Quick! Record Time 0 for your set up -Trade data -Answer this question: Two Minute Timer 1.Examine the lamp, what type of electromagnetic energy is the lamp producing?

124 Quick! Record Time 2 for your set up -Trade data -Answer this question: Two Minute Timer 2. Define the word: specific heat

125 Quick! Record Time 4 for your set up -Trade data -Answer this question: Two Minute Timer 3. What is the method of energy transfer responsible for the heat transfer between the lamp and the cans?

126 Quick! Record Time 6 for your set up -Trade data -Answer this question: Two Minute Timer 4. Look at the data for sand and water which cup is heating up faster?

127 Quick! Record Time 8 for your set up -Trade data -Answer this question: Two Minute Timer 5. Note which can is getting hotter faster, the black can or the silver can. Explain the data in your own words.

128 Without disturbing the positions of the cans, TURN OFF THE LAMP and MOVE IT AWAY FROM THE CANS/CUPS Half Way Done!!!

129 Quick! Record Time 10 for your set up -Trade data -Answer this question: Two Minute Timer 6. Note which cup is hotter: The sand or the water. Based on this compare the density of the air over the sand to the density of the air over the water.

130 Quick! Record Time 12 for your set up -Trade data -Answer this question: Two Minute Timer 7. Explain why the black can appears black based on last nights reading.

131 Quick! Record Time 14 for your set up -Trade data -Answer this question: Two Minute Timer 8. Look at the data for sand and water which cup is cooling down up faster?

132 Quick! Record Time 16 for your set up -Trade data -Answer this question: Two Minute Timer 9. Relate this experiment to real life. What type of surface on earth could be represented the silver can? The black can?

133 Quick! Record Time 18 for your set up -Trade data -Answer this question: Two Minute Timer 10. Compare your answers to questions 6 and 8, complete this sentence: “Good Absorbers are also good… _______________”

134 Quick! Record Time 20 for your set up -Trade data -Answer this question: Two Minute Timer 11. Texture also plays a key role in the absorption of heat energy. Compare a rough surface and a smooth surface, which one will absorb more energy and why?

135 Quick! Record Time 22 for your set up -Trade data -Answer this question: Two Minute Timer 12. By 3:00 P.M. on a summer day would the air be cooler over ocean or land?

136 Graph your data before you answer the questions!!!!

137 Conclusion: Write a short paragraph summarizing your understanding of the interaction between radiation and earth’s different surfaces. Use at least five of vocabulary words of these vocabulary words: Electromagnetic spectrum, visible light, prism, ozone, absorption, reflection, temperature, specific heat, reradiation, and infrared radiation.

138 Do Now: HW on Desk -Pass up procedure for 3D topo lab  - Reflect on these two questions:  1) Would it take more energy to raise 5 g of water 5ºC or 20ºC?  2) Would it take more energy to raise 5 grams of water 10ºC or 100 grams of water 10ºC

139 Do Now: Calculate the amount of energy in joules required to raise the temperature of 5 grams of granite from 82º C degrees to 100º C

140 PHASES OF Matter: PHASES OF Matter:

141 Matter is anything made of atoms and molecules.

142 B) LIQUID A) SOLID C) GAS

143 Motion How is it Does it have Volume? (Kinetic bonded? A definite energy)shape? Little K.E. Molecules vibrate Strong yes More K.E. Molecules move freely Not bonded rigidly no yes Most K.E. Molecules move fast Not bonded no Gas Liquid Solid

144

145

146 What are the changes of phase called? solid liquid gas FREEZING MELTING VAPORIZATION CONDENSATION

147 2. ENERGY IS RELEASED (lost) DURING: SOLID LIQUID GASLIQUID FREEZING CONDENSATION from higher K.E. to lower K.E.

148 3. ENERGY IS ABSORBED (gained) DURING: SOLID LIQUID GASLIQUID MELTING VAPORIZATION from lower K.ETo higher K.E.

149 Do Now -Take out lab, pass up procedure

150 Latent heat Energy stored during a phase change is called __________________ No change in temperature 149

151 TAKE OUT YOUR EARTH SCIENCE REFERENCE TABLES 150

152 Properties of Water (Earth Science Reference Tables : front page)

153 temp 0 C 100 Heating Curve of Water HEAT ENERGY ADDED 0 MELT FREEZE VAPORIZATION CONDENSATION STEAM WATER ICE (Joules)

154 Do Now: -Take out sheet from do now desk and complete, this replaces yesterdays there was a typo -Take out Homework

155 Problem 1 : Does temperature change during a phase change? ___________ Explain: NO!!!! The energy gained by boiling water or melting ice is stored as latent heat. Likewise this latent heat is released to the environment during condensation and freezing. This absorbed or released heat is used to change the phase not the temperature.

156 Problem 2: How many Joules of heat energy must be added to 20 grams of ice at 0oC to melt it completely to liquid water at 0oC? Show All work.: P∆= LH x Mass P∆= 334J/g x 20g P∆= 6680 J

157 3. The most energy is released during which phase change 4: The most energy is absorbed during which phase change: 5. Which phase has the most K.E.? GAS (STEAM) condensation Vaporization

158 Problem 6: How many joules of heat (Q) energy must be added to 35 grams of liquid water to change the temperature from 10 o C to 100 o C water vapor? Is this a phase change problem or specific heat? Q= C x Mass x T∆ Q= 4.18J/g°C x 35g x 90°C Q= J Specific Heat (C)

159 Problem 7 : How many joules of heat energy must be added to 35 grams to change liquid water at 100 o C to water vapor at 100 o C? Is this a phase change problem or specific heat? P∆= LH x Mass P∆= 2260 J/g x 35g P∆= J Phase Change (LH)

160 Problem 8: How many Joules of heat energy must be added to 35 grams of water vapor to change its temperature from 100 o C to 145 o C? Show all work. Is this a phase change problem or specific heat? Specific Heat (C) Q= C x Mass x T∆ Q= 2.00 J/g°C x 35g x 45°C Q= 3150 J

161 Problem 9: How many Joules of heat energy must be added to 35 grams of ice to change the temperature from 10 o C to 145 o C water vapor? How many steps are in this problem? Show All work.

162 SEE EARTH SCIENCE REFERENCE TABLE: MELTING / FREEZING J/gram Energy is absorbed Energy is released 0 0 C J/gram

163 100 0 C J/g Energy is absorbed Energy is released VAPORIZATION/ CONDENSATION J/g

164 -Quiz is still Friday… will cover everything up to the greenhouse effect. More details tomorrow. -No lunch club today, sorry! -Single period exam on Tuesday on Entire Energy Packet

165 Do Now  Test is moved to Tuesday  Do Now Worksheet on Desk  Extra-help on Monday after school  Pass-up Procedure for phase change lab  Take out Mookie the Monkey Note-packet

166 The Earth is always trying to achieve Equilibrium Energy is constantly being re-distributed flowing from source to sink

167 The Earth Receives Energy from two sources:

168 SUN

169 Radioactive Energy CORE

170 All matter radiates some _____________ _____________ Electromagnetic Energy

171 The sun emits energy in _____ wavelengths of the electromagnetic spectrum. Read about the Electromagnetic Spectrum. ALL

172 ELECTROMAGNETIC SPECTRUM: REFERENCE TABLE PAGE 14 Increasingwavelength Violet Blue Green Yellow Orange Red visible gammaX ray Ultra violet Infrared Microwaves Radio waves Decreasingwavelength

173 Increasingwavelength Violet Blue Green Yellow Orange Red visible gammaX ray Ultra violet Infrared Microwaves Radio waves Decreasingwavelength Each type of energy differs in its __________ wavelength

174 Read about Waves! A wavelength is the distance between two crests of the wave.

175 Frequency is defined as a number of cycles per unit time.

176

177 1. Explain the diagram above in no more than 3 sentences: ________________________________ __________________________________________________________________________ __________________________________________________________________________ 2. Which types of electromagnetic energy have the greatest and least amount of energy? (Highest temperatures vs. lowest temperatures) ____________________________________________________________________________________________ ______________________________________________________________________ 3. How are the different types of electromagnetic energy distinguished from one another? ____________________________________________________________________________________________ ______________________________________________________________________ 4. What types of electromagnetic energy are between Microwaves and X-Rays? ____________________________________________________________________________________________ ______________________________________________________________________ 5. Explain how Gamma Rays and X-Rays are different and similar? ____________________________________________________________________________________________ ______________________________________________________________________ 6. Why do you think you wear a lead shield when you have an X-Ray? ____________________________________________________________________________________________ ______________________________________________________________________ 7. Based on the electromagnetic spectrum why do you think UV rays are dangerous to human health? ____________________________________________________________________________________________ ______________________________________________________________________

178 The Sun gives off light and heat in the form of _________________ and __________________ electromagnetic energy. VISIBLE UV

179 However, the short wavelengths (dangerous UV radiation) are mostly absorbed by the ozone so they don’t reach earth’s surface OZONE GAMMA

180 The Ozone layer is found in the _________________ layer of the atmosphere. stratosphere

181 Increasingwavelength Violet Blue Green Yellow Orange Red visible gammaX ray Ultra violet Infrared Microwaves Radio waves Decreasingwavelength

182 SHORT WAVE LENGTHS ARE MOSTLY ABSORBED by THE OZONE IN THE STRATOSPHERE gamma, x-rays, OZONE UV

183 This energy is absorbed by Earth’s surface, which in turn reradiates the energy in the form of heat called ________________ radiation infrared

184 OZONE VISIBLE LIGHT : PASSES THROUGH THE ATMOSPHERE WITH THE GREATEST INTENSITY VISIBLE LIGHT : PASSES THROUGH THE ATMOSPHERE WITH THE GREATEST INTENSITY

185

186 Heat energy that Earth re-radiates Sun emits all wavelengths Infrared:

187 Increasingwavelength Violet Blue Green Yellow Orange Red visible gammaX ray Ultra violet Infrared Microwaves Radio waves Decreasingwavelength

188 How does too Much contribute to Global warming? CO 2 H 2 0 VAPOR METHANE GAS INFRARED CO 2 CO 2 absorbs infrared

189 Do Now: Take a sheet from the do now desk. -This is the answer key to the review packet handed out the first day of energy -Focused Free Write: Is temperature a measure of heat energy?

190

191 Interactions between Electromagnetic Energy & The Environment:

192 ABSORBTION REFLECTION SCATTERING REFRACTION TRANSMISSION REFLECTION SCATTERING REFRACTION TRANSMISSION - UV ABSORBED by OZONE IN STRATOSPHERE INFRARED ABSORBED BY - BY CLOUDS, ICE, SNOW & WATER - BY CLOUDS, ICE, SNOW & WATER - BY AEROSOLS, WATER DROPLETS, ICE CRYSTALS, AIR POLLUTANTS, DUST, POLLEN WATER DROPLETS, ICE CRYSTALS, AIR POLLUTANTS, DUST, POLLEN LIGHT IS BENT AS IT MOVES THROUGH VARIED DENSITIES LIGHT IS BENT AS IT MOVES THROUGH VARIED DENSITIES WHEN ENERGY PASSES THROUGH A MEDIUM WHEN ENERGY PASSES THROUGH A MEDIUM CO 2 & H 2 O vapor methane, nitrous oxide

193 1. ABSORPTION 2. REFLECTION 3.SCATTERING 4. REFRACTION 5. TRANSMISSION Do Now: Turn to page 15 in your note packet, start filling in the blanks

194 Less than ______ of the incoming solar radiation is received by the Earth’s surface half

195 Do Now  Ditto On Do Now Desk  Sit Quietly in your Assigned seats  Take out HW Worksheet  Smile its Friday!

196 Surface properties of the Earth and Absorption of Energy:

197 Color: Texture: Reflection vs. Absorption & Radiation Rough surface absorbs smooth surface reflects Light (white) reflects dark (black) absorbs

198 Absorption  Good absorbers are also good re-radiators.  What type of surface is the best absorber?  What type of surface is the best reflector of radiation? –Dark –Rough –Light –Shiny –Flat Snow and Ice reflect insolation and remain cold. Pavement warms before grassy lawns.

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200 ELECTROMAGNETIC SPECTRUM: LAB Increasingwavelength Violet Blue Green Yellow Orange Red visible gammaX ray Ultra violet Infrared Microwaves Radio waves Decreasingwavelength

201 Spectroscope Lab

202 Do Now on Desk  Aim: Greenhouse Effect  Phase change lab due tomorrow  Review Packet due tomorrow  Energy Exam next Tuesday  Extra Help Today After School

203 Greenhouse Effect Short wavelength visible light enters the greenhouse, is absorbed, then re-radiated as longer wavelength infrared (heat). The glass traps the infrared.

204 What is Global Warming? An ___________ in the Earth’s Average surface air temperature increase

205 THE GREENHOUSE EFFECT 204

206 THE GREENHOUSE EFFECT Energy absorbed HEAT IS TRAPPED BY THE GLASS OF THE GREENHOUSE Incoming is Short wave Ex: Visible light outgoing is Longer wave Infrared 205

207  Short wave radiation like ___________ passes through the glass of a greenhouse and is _______________ by the objects inside the greenhouse. Visible light absorbed 206

208  These objects __________________ the energy as ____________________, which get reflected back into the greenhouse and warms the air. infrared Long Wave Radiation reradiate 207

209  In Earth’s atmosphere, there are many gases that act like the glass of a greenhouse and ________ long-wave radiation, keeping it in the Earth’s Atmosphere. These are known as… trap 208

210 Greenhouse Gases! 209

211 Greenhouse Effect  CO 2 and H 2 O absorb infrared that is re-radiated from the surface of the Earth. Therefore, holding that heat in the atmosphere and raising the global temperature.

212 What are the Greenhouse gases? CO 2 H 2 0 VAPOR METHANE GAS INFRARED Ozone CFCs

213 Without some greenhouse gases, the Earth would be too _____________ for us to survive. But an overload of greenhouse gases creates a problem as well! cold

214 How does too Much contribute to Global warming? CO 2 H 2 0 VAPOR METHANE GAS INFRARED CO 2 CO 2 absorbs infrared

215 Greenhouse Effect  What human activities contribute to CO 2 production and an increase in the greenhouse effect? –Burning of fossil fuels –Global deforestation

216 If present trends continue possible effects may include  Rising sea levels due to melting polar ice caps;  Increasing frequency and severity of storms and hurricanes;  More frequent heat waves and droughts; and  Relocation of major crop growing areas.

217 A B c Which of the following best represents the type of energy received by the Earth and the re-emitted by the Earth?

218 A B c Which of the following best represents the type of energy received by the Earth and the re-emitted by the Earth?

219 A B A)INSOLATION C) VISIBLE LIGHT B) ULTRAVIOLET WHICH TYPE OF ENERGY IS REPRESENTED BY THE RADIATION AT B? D) INFRARED ENERGY

220 A B A)INSOLATION C) VISIBLE LIGHT B) ULTRAVIOLET WHICH TYPE OF ENERGY IS REPRESENTED BY THE RADIATION AT B? D) INFRARED ENERGY

221 An energy resource that is __________________ __________________ ___. Being used faster than Earth Produces it What is a NON-RENEWABLE RESOURCE? 220

222 Examples: __________________ Fossil Fuels, minerals What is a NON-RENEWABLE RESOURCE? 221

223 To make our non- renewable resources last longer we can __________________ __________________ _________. Reduce Reuse Recycle What is a NON-RENEWABLE RESOURCE? 222

224 An energy resource that is __________________ __________________ ___. Earth supplies faster than we use it “unlimited” What is a RENEWABLE RESOURCE? 223

225 Examples: __________________ _____________ Solar, wind, biomass (trees etc..) What is a RENEWABLE RESOURCE? 224

226 A renewable resource produces less _________ (substance that can harm living things and/or the environment pollution What is a RENEWABLE RESOURCE? 225

227 Look at the pie graph!!!  Only 7% of our energy consumption is from renewable resources!!! Try to make little changes in your life to reduce your dependence on Non- Renewable Resources!  What do you plan to do?

228


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