UNIT 5: Photosynthesis & Cell Respiration

ENERGY AND LIFE Living things depend on energy Sun is source of most energy 2 types of organisms, AUTOTROPHS make their own food (Ex: plants, bacteria*, protists*) HETEROTROPHS get energy from the foods they consume (animals, fungi)

Essential Question #1: What are the reactants, products, and basic functions of photosynthesis?

What is Photosynthesis? The process of photosynthesis is a C________ R__________. It is the most important chemical reaction on our planet.

What is the equation for the chemical reaction of photosynthesis?

What is the equation for the chemical reaction of photosynthesis? Six molecules of carbon dioxide react with six molecules of water to form 1 molecule of glucose and six molecules of oxygen.

Describe Photosynthesis The process of changing light energy to chemical energy Energy stored as S_________ Occurs in plants and some a_______ Takes place in the chloroplasts, using chlorophyll, the green pigment in plants

What happens during photosynthesis? Plants capture light energy using the organelle known as the C_______and use that energy to make glucose Sunlight provides the energy needed by chlorophyll to change molecules of carbon dioxide and water into glucose Oxygen is also released in this reaction

What happens during photosynthesis? Carbon dioxide enters the leaf CO2 combines with the stored energy in the chloroplasts through a chemical reaction to make glucose The sugar (glucose) is moved through tubes in the leaf to the roots, stems and F_____of the plants Some of the sugar is used right away by the plant for energy; some is stored as S______; and some is built into plant tissue

Why is this important to us? We cannot make our own food (glucose, energy). We must get our food from plants. Plants are the first step in the food chain.

Why is this important to us? The O_________ released during photosynthesis is necessary for all living things. This is actually a WASTE product for the plant!

Essential Question #2 What are the reactants, products, and basic functions of cellular respiration?

What is Cellular Respiration? The release of chemical energy for use by cells.

What is Cellular Respiration? Once the energy that was in sunlight is changed into chemical energy by P________, an organism has to transform the chemical energy into a form that can it can use! This process is cellular respiration.

Describe Cellular Respiration The breakdown of G_______ molecules to release energy Takes place in all living things Is a step by step process

What is the chemical equation for cellular respiration?

Essential Question #3 How are photosynthesis and cellular respiration related?

Read how photosynthesis & respiration are related: Learn more about photosynthesis at: http://www.ftexploring.com/me/photosyn1.html Read how photosynthesis & respiration are related: http://www.usoe.k12.ut.us/curr/science/sciber00/8th/energy/sciber/photosyn.htm

Photosynthesis & Cell Respiration Compare the chemical reaction of Photosynthesis to the chemical reaction for Cell Respiration PHOTOSYNTHESIS 6CO2 + 6H2O  C6H12O6 + 6O2 CELL RESPIRATION C6H12O6 + 6O2  6CO2 + 6H2O

Essential Question #4 What is the role of adenosine triphosphate (ATP) to energy transfers within a cell?

CHEMICAL ENERGY AND ATP All living things use C__________- energy A chemical compound that cells use to store and release energy is ATP (ADENOSINE TRIPHOSPHATE).

CHEMICAL ENERGY AND ATP ATP is like a fully charged B________ ready to power the machinery of a cell. ATP powers many cellular activities Ex: active transport across C_____M______ Making P_______ muscle contraction.

Cellular Respiration Cellular respiration makes ATP (energy) by breaking down sugars. Cellular respiration requires oxygen. Cell respiration takes place in M________ of the cell. mitochondrion animal cell

ATP  ADP (Don’t copy) ATP is a high energy molecule. Produced when food is used for energy (cell respiration) ADP ATP Used when plant capture sunlight energy (photosynthesis) ATP ADP