Photosynthesis and Respiration 7th Grade Life Science The Energy Cycle Photosynthesis and Respiration 7th Grade Life Science

Photosynthesis Materials Needed Sunlight Carbon dioxide CO2 Water H2O

Photosynthesis Who – What organisms can perform photosynthesis? All plants Some bacteria Some protists

Photosynthesis Where – Where in the cell does photosynthesis happen? Chloroplast

Photosynthesis What – What happens in the chloroplasts? Sunlight is absorbed by the green pigment chlorophyll along with carbon dioxide and water A chemical reaction occurs that produces glucose C6H1206 and oxygen 02

Photosynthesis When – When does photosynthesis occur? In the presence of sunlight

Photosynthesis Why – Why is photosynthesis so important? Provides food for living things Provides oxygen for living things Regulates carbon dioxide in the atmosphere

Photosynthesis How – How does photosynthesis happen? A Chemical Reaction Formula: 6CO2 + 6H2O + light energy C6H12O6 + 6O2

Photosynthesis Products Food (Glucose) Some of which is used by the plant for energy Some of which is stored by plant in the vacuoles Oxygen Released into the atmosphere

Respiration Materials Needed Oxygen O2 Glucose (Food in the form of a type of sugar) C6H12O6

Respiration Who – What organisms can perform respiration? All living things

Respiration Where – Where in the cell does respiration happen? Mitochondria, the cell’s “power house”

Respiration What – What happens in the mitochondria? A complex chemical reaction in which Oxygen and glucose are absorbed And then converted into energy that the organism uses As well as carbon dioxide and water that the organisms releases back into the atmosphere

Respiration When – When does respiration occur? Constantly Living things always need energy

Respiration Why – Why is respiration so important? Gives living things energy to reproduce, grow, develop, adapt, and survive.

Respiration How – How does respiration? A Chemical Reaction Formula C6H12O6 + 6O2 6CO2 + 6H2O + energy

Respiration Products: Energy Used up by the organism Carbon Dioxide and Water Released into the atmosphere

So, What’s the Connection? Why are photosynthesis and respiration called the Energy Cycle? Because…The end of one is the beginning of the other. Each relies on the other to continue and all living things need this cycle to exist. The Energy Cycle is what makes Earth unique…the only known living planet.