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Photosynthesis Photosynthesis • • • • • • • • • • • Biology 1406 first day quiz True or False When white light passes through a colored filter, the filter adds color to the light. True or False The primary source of oxygen for our atmosphere is trees. True or False It is harmful to baby birds to pick them up and return them to their nests. True or False Swallowed chewing gum takes seven years to digest. True or False DNA is not made of protein. True or False Hair and fingernails continue to grow after a person dies. True or False Fever harms the brain and the body. True or False Daddy longlegs spiders (Pholcus phalangioides) are the most venomous spiders in the world. True or False Sugar causes hyperactivity in children. True or False Humans catch warts from toads or other animals. Photosynthesis • PHOTOSYNTHESIS PART I: THE SUN AND LIGHT • Sun-Ultimate • Not all of the light from the Sun makes it to the surface of the Earth. • The little light that does make it here is enough for the plants of the world to survive and go through the process of photosynthesis. Photosynthesis • Even when light gets to a plant, the plant doesn't use all of it. It actually uses only certain colors to make photosynthesis happen. Photosynthesis • Plants mostly absorb red and blue wavelengths of light. Photosynthesis • When you see a color, it is actually a color that the object does NOT absorb. • In the case of green plants, they do not absorb light from the green range. Photosynthesis • PART II: THE CHLOROPLAST • Photosynthesis happens in the chloroplast. • Within this cell organelle is the chlorophyll that captures the light from the Sun. • Chloroplasts harness light and convert to chemical energy. Photosynthesis • PART III: THE MOLECULES • Chlorophyll is the magic compound that can grab that sunlight and start the whole process. Photosynthesis • Today – Spectrophotometer measure wavelengths of absorbed light – Pigment chromatography • Four primary pigments of green plants • Starch Storage