Biology

• Photosynthesis word equation: Carbon dioxide + Water -> Glucose + Oxygen
• Plants turn glucose into starch
• We can test for starch using iodine solution.
• Roots absorb water from the soil and transport it to the leaves.
• Photosynthesis is essential for life on Earth
• Photosynthetic organisms are the main producers of food
• Without photosynthesis, Earth's atmosphere would lose its oxygen
• Photosynthesis


  1. Green plants and algae trap light from the sun

  2. Fix carbon dioxide with hydrogen and water

  3. Make organic compounds

  4. Provide food for plants and animals
• Photosynthesis happens in


  Leaf cells
• Chloroplasts


  • Tiny organelles in leaf cells
  • Contain chlorophyll, a green substance
• Chlorophyll


  Molecules that sit on the surface of chloroplasts and capture light energy from the sun
• Photosynthesis


  1. Carbon dioxide and water are converted to glucose and oxygen

  2. Using the energy provided from the light absorbed by chlorophyll
• Photosynthesis


  An endothermic reaction that takes in energy from its surroundings
• Plants absorb water through their roots and it moves through the plants and into the leaves by transpiration
• Carbon dioxide enters the leaves from the air through the stomata on the underside of the leaf
• Photosynthesis


  1. Glucose and oxygen are made

  2. Some glucose is used for respiration

  3. Some glucose is converted into insoluble starch and stored
• Oxygen is a byproduct of photosynthesis
• Green plants


  Producers or autotrophs that can produce their own food
• The glucose made by photosynthesis feeds all animals on Earth
• The oxygen made by photosynthesis keeps us alive
• Photosynthetic organisms are the main producers of food
• Without photosynthesis, Earth's atmosphere would lose its oxygen
• Photosynthesis


  1. Green plants and algae trap light from the sun

  2. Fix carbon dioxide with hydrogen and water

  3. Make organic compounds

  4. Provide food for plants and animals
• Photosynthesis happens in


  Leaf cells
• Chloroplasts


  • Tiny organelles in leaf cells
  • Contain chlorophyll
• Chlorophyll


  Green substance in chloroplasts that captures light energy from the sun
• Photosynthesis


  1. Carbon dioxide and water are converted to glucose and oxygen

  2. Using the light energy absorbed by chlorophyll
• Photosynthesis


  An endothermic reaction that takes in energy from its surroundings
• Plants absorb water through their roots and it moves through the plants and into the leaves by transpiration
• Carbon dioxide enters the leaves from the air through the stomata on the underside of the leaf
• Photosynthesis


  1.Glucose and oxygen are made

  2.Some glucose is used for respiration

  3.Some glucose is converted into insoluble starch and stored
• Oxygen is a product of photosynthesis
• Green plants


  Producers or autotrophs that can produce their own food
• Hundreds of millions of years ago huge quantities of living things died and were trapped in layers of rock, forming our fossil fuels of coal, oil and natural gas
• Sometimes the living things were trapped in mud deposits that got compressed into shale
• The carbon dioxide released during respiration is cycled naturally
• Photosynthetic organisms


  Organisms that produce their own food through the process of photosynthesis using sunlight, water, and carbon dioxide
• Herbivores


  Animals that consume only plant-based foods for their nutrients
• Herbivore nutrients: minerals (calcium, phosphorus, potassium, magnesium)
• Nitrogen: needed to make protein so nitrogen deficiency leads to stunted growth