Brent Cook

Life Processes and Plant Needs

(Covers LS 4)

• Introduction:
  
  • Who I am and what I will be talking about
  • Why do we see leaves change color in the Fall?
    
• Main Body:
  • Explanation of what color is
    • white light and the color spectrum
      
  • Explanation of why we can see different colors
    • light experiment showing how colors are absorbed
• Discussion of what makes leaves different colors
  • chlorophyll, carotene, anthocyanin
  • experiment showing different pigments in leaves
  • examples of leaves that have changed colors
• Conclusion:
• Leaves changing color in the Fall is an important life process for trees.