4. RED SLIDE: These are notes that are very important and should be recorded in your science journal. Copyright © 2010 Ryan P. Murphy

6. Please use this red line

7. -Please make notes legible and use indentations when appropriate. Please use this red line

8. -Please make notes legible and use indentations when appropriate.

9. -Please make notes legible and use indentations when appropriate. -Example of indent.

10. -Please make notes legible and use indentations when appropriate. -Example of indent. -Skip a line between topics

11. -Please make notes legible and use indentations when appropriate. -Example of indent. -Skip a line between topics -Don’t skip pages

12. -Please make notes legible and use indentations when appropriate. -Example of indent. -Skip a line between topics -Don’t skip pages -Make visuals clear and well drawn.

14. RED SLIDE: These are notes that are very important and should be recorded in your science journal. BLACK SLIDE: Pay attention, follow directions, complete projects as described and answer required questions neatly. Copyright © 2010 Ryan P. Murphy

15. Keep an eye out for “The-Owl” and raise your hand as soon as you see him. –He will be hiding somewhere in the slideshow Copyright © 2010 Ryan P. Murphy

16. Keep an eye out for “The-Owl” and raise your hand as soon as you see him. –He will be hiding somewhere in the slideshow “Hoot, Hoot” “Good Luck!” Copyright © 2010 Ryan P. Murphy

19. Lab activity link (Optional) The Effect of Acid Rain on Seed Growth. (Begin Today) –http://serc.carleton.edu/sp/mnstep/activities/356 85.htmlhttp://serc.carleton.edu/sp/mnstep/activities/356 85.html

20. New Biogeochemical Cycle: The Nitrogen Cycle. New Biogeochemical Cycle: The Nitrogen Cycle. Copyright © 2010 Ryan P. Murphy

21. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

22. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

23. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

24. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

25. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

26. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

27. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

28. What will be studying a whole lot of in the next few days?What will be studying a whole lot of in the next few days? Copyright © 2010 Ryan P. Murphy

29. Yes, We will be studying concepts that have a lot to do with waste.Yes, We will be studying concepts that have a lot to do with waste. Copyright © 2010 Ryan P. Murphy

30. Nitrogen Cycle: The circulation of nitrogen. Nitrogen Cycle: The circulation of nitrogen. Copyright © 2010 Ryan P. Murphy

31. Nitrogen Cycle: The circulation of nitrogen. Nitrogen Cycle: The circulation of nitrogen. Copyright © 2010 Ryan P. Murphy

32. Nitrogen Cycle: The circulation of nitrogen. Nitrogen Cycle: The circulation of nitrogen. Copyright © 2010 Ryan P. Murphy

33. Nitrogen Cycle: The circulation of nitrogen. Nitrogen Cycle: The circulation of nitrogen. Copyright © 2010 Ryan P. Murphy

34. Video! The goal will be to try and make some sense out this confusing video. Copyright © 2010 Ryan P. Murphy

35. Video! The goal will be to try and make some sense out this confusing video. –We will watch it again at the end of class to see if we understand any of it. It’s wacky. Copyright © 2010 Ryan P. Murphy

36. Video! The goal will be to try and make some sense out this confusing video. –We will watch it again at the end of class to see if we understand any of it. It’s wacky. –http://www.youtube.com/watch?v=tSzLQojOItg&f eature=iv&src_vid=Hghru0O7dDs&annotation_id =annotation_151343http://www.youtube.com/watch?v=tSzLQojOItg&f eature=iv&src_vid=Hghru0O7dDs&annotation_id =annotation_151343 Copyright © 2010 Ryan P. Murphy

37. Everyone take a deep breath in and then breathe out. –78% of what you just breathed in was Nitrogen N2 gas –78% of what you exhaled was… Nitrogen N2 gas. Copyright © 2010 Ryan P. Murphy

38. Everyone take a deep breath in and then breathe out. –78% of what you just breathed in was Nitrogen N 2 gas –78% of what you exhaled was… Nitrogen N2 gas. Copyright © 2010 Ryan P. Murphy

39. Everyone take a deep breath in and then breathe out. –78% of what you just breathed in was Nitrogen N 2 gas –78% of what you exhaled was… Nitrogen N 2 gas. Copyright © 2010 Ryan P. Murphy

40. Everyone take a deep breath in and then breathe out. –78% of what you just breathed in was Nitrogen N 2 gas –78% of what you exhaled was… Nitrogen N 2 gas. Copyright © 2010 Ryan P. Murphy

41. Nitrogen in the atmosphere is N 2 gas which is doesn’t bond well with other molecules. Copyright © 2010 Ryan P. Murphy

42. Nitrogen in the atmosphere is N 2 gas which is doesn’t bond well with other molecules. –Nitrogen forms triple bonds with itself. Copyright © 2010 Ryan P. Murphy

43. Nitrogen in the atmosphere is N 2 gas which is doesn’t bond well with other molecules. –Nitrogen forms triple bonds with itself. Copyright © 2010 Ryan P. Murphy

44. Nitrogen in the atmosphere is N 2 gas which is doesn’t bond well with other molecules. –Nitrogen forms triple bonds with itself. Copyright © 2010 Ryan P. Murphy

45. Nitrogen in the atmosphere is N 2 gas which is doesn’t bond well with other molecules. –Nitrogen forms triple bonds with itself. Copyright © 2010 Ryan P. Murphy

46. When nitrogen is “fixed”, it’s bonds are split with the other nitrogen. Now it has three arms to make new friends, Copyright © 2010 Ryan P. Murphy

47. When nitrogen is “fixed”, it’s bonds are split with the other nitrogen. Now it has three arms to make new friends like oxygen. Copyright © 2010 Ryan P. Murphy

48. When nitrogen is “fixed”, it’s bonds are split with the other nitrogen. Now it has three arms to make new friends like oxygen. Copyright © 2010 Ryan P. Murphy

49. When nitrogen is “fixed”, it’s bonds are split with the other nitrogen. Now it has three arms to make new friends like oxygen (NO 2 ) Bacteria Copyright © 2010 Ryan P. Murphy

50. Rain and precipitation bring the atmospheric Nitrogen to the ground.

52. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen.

53. –Fix means change its form so a plant can use it.

54. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

55. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

56. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

57. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

58. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

59. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

60. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

61. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

62. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

63. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

64. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

65. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

66. Nitrogen fixing bacteria in the soil and on the root nodules of plants can fix the nitrogen. –Fix means change its form so a plant can use it.

67. Plants can now use this new molecule to get the nitrogen they need to build proteins so they can grow, repair, and reproduce. Copyright © 2010 Ryan P. Murphy Oxygen

68. Plants can now use this new molecule to get the nitrogen they need to build proteins so they can grow, repair, and reproduce. –With the help of nitrogen fixing bacteria Copyright © 2010 Ryan P. Murphy Oxygen

69. Plants can now use this new molecule to get the nitrogen they need to build proteins so they can grow, repair, and reproduce. –With the help of nitrogen fixing bacteria Copyright © 2010 Ryan P. Murphy Oxygen

70. Plants can now use this new molecule to get the nitrogen they need to build proteins so they can grow, repair, and reproduce. –With the help of nitrogen fixing bacteria Copyright © 2010 Ryan P. Murphy Oxygen

71. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

72. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

73. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

74. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

75. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

76. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

77. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

78. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

79. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

80. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

81. Eventually, plants and animals die. Ammonia (NH3) / Decay / Waste

82. When plants and animals die. –Nitrifying bacteria break down the nitrogen in their tissues. (Nitrites NO 2 )

83. When plants and animals die. –Nitrifying bacteria break down the nitrogen in their tissues. (Nitrites NO 2 )

84. When plants and animals die. –Nitrifying bacteria break down the nitrogen in their tissues. (Nitrites NO 2 )

85. Denitrifying bacteria can also change the NH 3 Nitrate back to N 2 Nitrogen gas

86. When the nitrogen is denitrified, it then bonds with another nitrogen to form inert N 2 gas in the atmosphere until the cycle repeats. Copyright © 2010 Ryan P. Murphy

87. When the nitrogen is denitrified, it then bonds with another nitrogen to form inert N 2 gas in the atmosphere until the cycle repeats. “We now get to hang out in the atmosphere for a long time.” Copyright © 2010 Ryan P. Murphy

88. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

89. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

90. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

91. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

92. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

93. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

94. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Air, which is 79% nitrogen gas (N 2 ), is the major reservoir of nitrogen. But most organisms cannot use nitrogen in this form. Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds such as: –nitrate ions (NO 3 −) –ammonia (NH 3 ) –urea (NH 2 )2CO Animals secure their nitrogen (and all other) compounds from plants (or animals that have fed on plants). Copyright © 2010 Ryan P. Murphy

95. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Nitrification: Plants with bacteria take up nitrogen. –Decay: Passes on through eating / waste. –Denitrification: Nitrogen returned to the air by bacteria. Happens with poor soil management. Copyright © 2010 Ryan P. Murphy

96. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Nitrification: Plants with bacteria take up nitrogen. –Decay: Passes on through eating / waste. –Denitrification: Nitrogen returned to the air by bacteria. Happens with poor soil management. Copyright © 2010 Ryan P. Murphy

97. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Nitrification: Plants with bacteria take up nitrogen. –Decay: Passes on through eating / waste. –Denitrification: Nitrogen returned to the air by bacteria. Happens with poor soil management. Copyright © 2010 Ryan P. Murphy

98. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Nitrification: Plants with bacteria take up nitrogen. –Decay: Passes on through eating / waste. –Denitrification: Nitrogen returned to the air by bacteria. Happens with poor soil management. Copyright © 2010 Ryan P. Murphy

99. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Plants with the help of bacteria take up nitrogen. –Decay: Passes on through eating / waste. –Denitrification: Nitrogen returned to the air by bacteria. Happens with poor soil management. Copyright © 2010 Ryan P. Murphy

100. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Plants with the help of bacteria take up nitrogen. –Decay and waste passes on nitrogen –Denitrification: Nitrogen returned to the air by bacteria. Happens with poor soil management. Copyright © 2010 Ryan P. Murphy

101. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Plants with the help of bacteria take up nitrogen. –Decay and waste passes on nitrogen –Denitrification: Nitrogen returned to the air by bacteria. Copyright © 2010 Ryan P. Murphy

102. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Plants with the help of bacteria take up nitrogen. –Decay and waste passes on nitrogen –Denitrification: Nitrogen returned to the air by bacteria. Copyright © 2010 Ryan P. Murphy

103. Four processes participate in the cycling of nitrogen through the biosphere: –Nitrogen fixation: Break apart N 2 so it can join to other atoms and be used. –Plants with the help of bacteria take up nitrogen. –Decay and waste passes on nitrogen –Denitrification: Nitrogen returned to the air by bacteria. Happens with poor soil management. Copyright © 2010 Ryan P. Murphy

104. This is an example of poor soil conservation methods which leads to soil nutrient depletion. Copyright © 2010 Ryan P. Murphy

105. This is an example of poor soil conservation methods which leads to soil nutrient depletion. –The lost nitrogen in this runoff will be denitrified by bacteria back to the atmosphere . Copyright © 2010 Ryan P. Murphy

106. This is an example of poor soil conservation methods which leads to soil nutrient depletion. –The lost nitrogen in this runoff will be denitrified by bacteria back to the atmosphere . Copyright © 2010 Ryan P. Murphy

107. Manmade fertilizers also puts nitrogen into the soil. (Ammonia NH 3 ) Copyright © 2010 Ryan P. Murphy

108. Manmade fertilizers also puts nitrogen into the soil. (Ammonia NH 3 ) –Excess / poor management of nitrogen can result in pollution. Copyright © 2010 Ryan P. Murphy

109. Manmade fertilizers also puts nitrogen into the soil. (Ammonia NH 3 ) –Excess / poor management of nitrogen can result in pollution. Copyright © 2010 Ryan P. Murphy

110. Manmade fertilizers also puts nitrogen into the soil. (Ammonia NH 3 ) –Excess / poor management of nitrogen can result in pollution. Copyright © 2010 Ryan P. Murphy

111. Nitrogen Cycle Available Sheet

112. Activity! Step by step drawing of the Nitrogen Cycle. Copyright © 2010 Ryan P. Murphy

131. Lightning can convert

132. And nitrogen mixes with rain

133. Lightning can convert And nitrogen mixes with rain

134. Lightning can convert And nitrogen mixes with rain

135. Lightning can convert And nitrogen mixes with rain

136. Lightning can convert And nitrogen mixes with rain Bacteria fix nitrogen into NH 3, NO 2 -, NO 3 -

138. Activity! PowerPoint Review Game Biogeochemical Cycles Copyright © 2010 Ryan P. Murphy

139. This PowerPoint is one small part of my Ecology Abiotic Factors Unit that I offer on TpT. This unit includes… 4 Part 2,400+ Slide PowerPoint 14 page bundled homework packaged that chronologically follows PowerPoint, + modified version 16 pages of unit notes with visuals 2 PowerPoint review game Rubrics, Answer Keys, games, and much more. http://www.teacherspayteachers.com/Product/Ec ology-Abiotic-Factors-Entire-Unit-HW-2500- Slide-PowerPoint-Morehttp://www.teacherspayteachers.com/Product/Ec ology-Abiotic-Factors-Entire-Unit-HW-2500- Slide-PowerPoint-More

140. http://www.teacherspayteachers.com/Product/Sc ience-Curriculum-4-Years-20-Units-35000- Slides-HW-Much-Morehttp://www.teacherspayteachers.com/Product/Sc ience-Curriculum-4-Years-20-Units-35000- Slides-HW-Much-More Please feel free to contact me with any questions you may have. Thanks again for your interest in this curriculum. Sincerely, Ryan Murphy M.Ed ryemurf@gmail.com