Photosynthesis Respiration What is Photosynthesis The process of

Photosynthesis & Respiration

What is Photosynthesis? The process of photosynthesis is the MOST important chemical reaction on our planet!

The equation for the chemical reaction of photosynthesis is: Sunlight (ENERGY!) 6 CO 2+6 H 2 O (Reactants/ Substrates) C 6 H 12 O 6 + 6 O 2 Glucose! (Products)

• Why do we need 6 CO 2 +6 H 2 O? • To balance the Equation! • Photosynthesis is a Synthesis reaction BECAUSE it builds a 6 carbon molecule (glucose) from single carbon molecules.

Describe Photosynthesis: Process that transforms light energy to chemical energy The chemical energy is stored in sugar (GLUCOSE) Occurs in plants, algae & some bacteria

Describe Photosynthesis, cont. Takes place in chloroplasts using chlorophyll, the green pigment in plants Chlorophyll uses light energy to drive the reaction!

What happens during photosynthesis? Plants capture light energy and use it to convert CO 2 and H 2 O to glucose (C 6 H 12 O 6) and oxygen (O 2) Glucose is stored, but Oxygen is released into the air

Photosynthesis, cont. The glucose is moved from the leaves to the roots, stems and fruits of the plants Some of the sugar is used by the plant for energy Some is stored as starch and/or built into plant tissue

Why is Photosynthesis important to us? 1. The energy that was in sunlight was transformed into chemical energy (in glucose) by photosynthesis!! 2. CO 2 has been converted to MATTER that we can use as a source of Carbon!! 3. Oxygen is produced!!

• Where is the energy stored in the Glucose molecule (C 6 H 12 O 6)? • In the BONDS between the Atoms!!!

Why do we need plants to do Photosynthesis? Reason 1: We cannot make our own food; we must get it from plants. Plants are the first step in the food chain.

Why do we need plants to do Photosynthesis? Reason 2: The oxygen released during photosynthesis is necessary for all living things.

What is Cellular Respiration?

What is Cellular Respiration? A chemical reaction that involves the breakdown of glucose molecules to release energy and transform it into ATP, the “gasoline” for our cells!

What is Cellular Respiration? It takes place in the mitochondria of both plant and animal cells (ALL living things!) A multi-step process

What are the Substrates & Products of the Reaction? • Requires Glucose & Oxygen as substrates (substances we take in)! • Produces Carbon Dioxide & Water (the things we breathe out!) as products.

What is the chemical equation for cellular respiration? Glucose Oxygen C 6 H 12 O 6+ 6 O 2 6 CO 2+6 H 2 O + 38 ATP

Photosynthesis Respiration Where does it occur? (organelle) Why is it important? What is the Substrate? Products? What is the formula? Who does it? (Plant, Animal)

Pre- Assessment 1. What types of living things carry out photosynthesis? 2. In which cell structure does photosynthesis occur?

Pre-assessment continued 3. What are the substrates for photosynthesis? 4. What are the products of photosynthesis?

Continued… 5. What does the term respiration make you think of? 6. In which cell structure does cellular respiration occur?

Wait there’s more… 7. What types of living things carry out cellular respiration? 8. What are the substrates for cellular respiration?

Food for thought… What goes in? What comes out? Where does the matter in the tree come from?

Where does the cow get energy? What go What co mes out? es in?