Photosynthesis Life from Light and Air Regents Biology

Photosynthesis: Life from Light and Air Regents Biology

The poetic perspective § All of the solid material of every plant § was built out of thin air All of the solid material of every animal was built from plant material air Regents Biology Then all the cats, dogs, mice, people & elephants… are really strands of air woven together by sunlight! sun

All LIVING organisms need energy! Organisms get energy directly or indirectly from sunlight in a process called photosynthesis Regents Biology

Photosynthesis: a process by which a cell captures energy in sunlight and uses it to make sugar (food). Organisms that photosynthesize are called Autotrophs Organisms that obtain energy by consuming autotrophs are called Heterotrophs Regents Biology 2006 -2007

Stomata cells & Homeostasis § Stoma/Stomata- molecule on the underside of leaf that lets molecules in and out Homeostasis u internal environment of the plant balanced by…. . § Stomata opening u u u let CO 2 in let H 2 O (vapor) out let O 2 out § Stomata closing u if too much H 2 O is evaporating Regents Biology Stomata (the hole) underneath of the leaf

The chloroplast § Site of photosynthesis § Contain Chlorophyll Outer membrane § § Stroma Thylakoid pigments that reflect green. Thylakoid: site of light dependent reactions Stroma: site of light independent reaction Granum Inner membrane Regents Biology Lamella

Pigments § Chlorophyll § Regents Biology pigments absorb blue and red but reflect green. Carotenoid pigments absorb violet and blue but reflect yellow, orange, and red.

Elements/Organelles involved leaves Bring In Creates/Releases • Sunlight through chloroplast • Sugar • (ENERGGYY) • CO 2 through • O 2 (oxygen) stomata through stomata • H 2 O (water) through roots • H 2 O (water) through stomata Plants store the sugar in their structures (stem, leaves, roots) shoot roots + + light O 6 + 6 Ois 2 6 CO O + the Chemical C 6 H 12 equation Brainstorm 2 + 6 H 2 what energy Regents Biology

Photosynthesis energy carbon sun + water + energy glucose + oxygen dioxide 6 CO 2 + 6 H 2 O + light C 6 H 12 O 6 + 6 O 2 energy Regents Biology

Photosynthesis in a leaf! 1. Cut out all pieces. 2. Fold the top leaf along the 3. 4. dotted line so that the leaf can open up from the point (opposite the stem). Glue the top leaf to the bottom leaf, but ONLY GLUE the half of the leaf that is nearest the stem. The other half of the leaf will open up to see the inside of the model. Begin to glue the arrows where they belong! Regents Biology

Regents Biology

Critical Question: List the products and reactants of photosynthesis Regents Biology 2006 -2007

Leaf Diagram Add a picture for Energy - Fill in the blank (arrow) with the proper term - cut and glue the arrows to point to the proper location of where each description is happening Regents Biology

Regents Biology

How do plants make energy & food? § Plants use the energy from the sun to make ATP energy u to make sugars u § glucose, sucrose, cellulose, starch, & more sun ATP sugars Regents Biology

Using light & air to grow plants § Photosynthesis using sun’s energy to make ATP u using CO 2 & water to make sugar u HAPPENS in chloroplasts u (ATP) = used to build the sugar carbon sun + water + energy glucose + oxygen dioxide 6 CO 2 + 6 H 2 O + sun C 6 H 12 O 6 + 6 O 2 energy Regents Biology

What do plants need to grow? § The “factory” for making energy & sugars u sun chloroplast Make ATP! Make sugar! I can do it all… § Fuels CO 2 sunlight u carbon dioxide u water u § The Helpers u enzymes Regents Biology H 2 O ATP enzymes sugars

Chloroplasts are only in plants plant cells animal cells Regents Biology

How are they connected? Respiration glucose + oxygen carbon + water + energy dioxide C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + ATP Photosynthesis carbon sun + water + glucose + oxygen energy dioxide 6 CO 2 + 6 H 2 O + light C 6 H 12 O 6 + 6 O 2 energy Regents Biology

Energy cycle sun Photosynthesis plants CO 2 glucose H 2 O sugars animals, plants Cellular Respiration The Great Circle of Life! Regents Biology Mufasa? ATP O 2