Photosynthesis & Cellular Respiration
Presentation
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Biology
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7th - 8th Grade
•
Medium
Standards-aligned
Erin Quinn
Used 675+ times
FREE Resource
19 Slides • 5 Questions
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Photosynthesis & Cellular Respiration
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What is Photosynthesis?
The process by which a cell captures the energy in sunlight and uses it to make food
Photosynthesis takes place in two stages: capturing the sun's energy and producing sugars.
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Capturing the Sun's Energy
This energy-capturing process occurs in the leaves and other green parts of the plant.
Chloroplasts are green organelles inside plant cells. In most plants, leaf cells contain more chloroplasts than other parts of the plant
Chloroplasts capture the light energy and use it to power the second stage of photosynthesis.
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Using Energy to Make Food
The cell needs two raw ingredients for this stage: water (H2O) and carbon dioxide (CO2)
Plant roots absorb water from the soil. The water then moves up through the plant’s stem to the leaves
Carbon dioxide is one of the gases in the air. Carbon dioxide enters the plant through small openings on the underside of the leaves
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Multiple Select
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Products of photosynthesis
Glucose (C6H12O6)
Oxygen (O2)
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Multiple Select
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What happens to the GLUCOSE?
Plant cells use some of the sugar for food.
Other sugar molecules may be stored in the plant's cells for later use. When you eat food from plants, such as potatoes or carrots, You are eating the plant's stored food.
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Multiple Choice
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What happens to the OXYGEN?
The other product of photosynthesis is OXYGEN.
Most of the oxygen passes out of the plant and into the air.
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PHOTOSYNTHESIS FORMULA
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Cellular Respiration
Cells break down simple food molecules such as GLUCOSE and release the ENERGY they contain.
Cells of all living things carry out cellular respiration continuously.
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Two Stages of Cellular Respiration- Stage 1
First stage happens in the cytoplasm where glucose molecules are broken down into smaller molecules.
Oxygen is NOT needed in this stage of respiration
Only a small amount of the energy is released during this stage.
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Two Stages of Cellular Respiration- Stage 2
Second stage of respiration takes place in the mitochondria. There, the small molecules are broken down into even smaller molecules.
These chemical reactions DO require OXYGEN
LOTS of energy is released.
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Multiple Select
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Products of Respiration
Carbon Dioxide (CO2)
Water (H2O)
ENERGY
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Multiple Select
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Opposite processes
During photosynthesis, carbon dioxide and water use light energy to produce glucose and oxygen.
During respiration, glucose and oxygen are used to produce carbon dioxide, water and ENERGY.
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Photosynthesis & Cellular Respiration
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