Tuesday October 14 2014 ActivityAssignment Entry Task Photosynthesis

Tuesday, October 14, 2014 Activity/Assignment Entry Task • Photosynthesis Notes • Get a STAMP for your Radish and Starch lab analysis questions • Make a list of ways we use plants – as many as you can think.

How does matter get in and out of a plant? (Put this drawing in your journal)

Stomata: Pores on the leaf surface that let water and gas enter and exit the leaf

Stomata

Chloroplast: Organelle in a leaf cell where photosynthesis occurs

The Movement Question Where atoms moving from? Where atoms moving to?

The Three Questions for photosynthesis: Write your ideas in your journal on this sheet. Where atoms moving from? Where atoms moving to? Chemical change What molecules are carbon atoms in before the change? What other molecules are involved? What molecules are carbon atoms in after the change? What other molecules are produced? What forms of energy are in the reactants? products? Remember: Atoms last forever and Energy lasts forever 7

Which atoms and molecules move so that plants can do photosynthesis? Add these to your notes water carbon dioxide glucose oxygen

How do glucose water, carbon dioxide and oxygen move for a plant leaf to photosynthesize? water carbon dioxide glucose oxygen

Plants make glucose from carbon dioxide and water in their leaves. Draw a diagram of a leaf – using arrows, show which molecules are inputs and which are outputs

What happens inside the leaf cell as it photosynthesizes? Chemical change

What is Photosynthesis? • Photosynthesis is the secret of plant growth. • Add to notes: Purpose of photosynthesis - to make glucose so that plants have energy and matter to grow

The Carbon Question: What is happening to carbon atoms? What molecules are carbon atoms in before photosynthesis? How are the atoms rearranged into new molecules during photosynthesis? The Energy Question: What is happening to energy? What forms of energy are involved in photosynthesis? How is energy changing from one form to another during photosynthesis?

Add to notes: Photosynthesis happens when light energy from the sun, carbon dioxide, and water are used to make sugar and oxygen. (the sugar is then used to build the plant’s mass; the O 2 is released as waste)

Wed-Thur, October 15 -16, 2014 Activity/Assignment Entry Task • Finish Photosynthesis Notes and get a STAMP for chart and notes • Modeling Photosynthesis with Molecule Models • What are the inputs of photosynthesis? What are the outputs of photosynthesis? (List both MATTER and ENERGY. )

Using modeling kits and your whiteboard, make a model of how matter and energy are transformed during photosynthesis.

Chemical Equation for Photosynthesis 6 H 2 O + 6 CO 2 C 6 H 12 O 6 + 6 O 2 (in words: water and carbon dioxide yield glucose and oxygen) 17

What happens to atoms and energy in photosynthesis? Carbon Dioxide Glucose Chemical change Reactants Water Products Light energy Oxygen 18

How can we answer the Carbon Question and the Energy Questions now? The Carbon Question: What is happening to carbon atoms? What molecules are carbon atoms in before photosynthesis? How are the atoms rearranged into new molecules during photosynthesis? The Energy Question: What is happening to chemical energy? What forms of energy are involved in photosynthesis? How is energy changing from one form to another during photosynthesis?

The Carbon and Energy Questions • Carbon: carbon atoms move from CO 2 molecules in the air (inorganic) to C 6 H 12 O 6 molecules in the plant (organic). • Energy: energy is transformed from light energy into chemical energy in the highenergy (C-C and C-H) bonds of the glucose molecule.