photosynthesis

    Cards (35)

    • What type of organisms are plants classified as in terms of food production?
      Autotrophs
    • Why are plants referred to as producers in food chains?
      Because they can make their own food using light, water, and carbon dioxide
    • What type of reaction is photosynthesis classified as?
      Endothermic reaction
    • Where does most photosynthesis take place in a plant?
      In the leaves, specifically in specialized mesophyll cells
    • What is the role of chlorophyll in photosynthesis?
      To absorb light energy
    • What are the products of photosynthesis used for in plants?
      To make all substances a plant needs and for respiration
    • What is the word equation for photosynthesis?
      • Carbon dioxide + Water → Glucose + Oxygen
    • What is the balanced symbol equation for photosynthesis?
      • \( 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2 \)
    • How do plants obtain the materials needed for photosynthesis?
      From the environment
    • Why is photosynthesis essential for food chains on Earth?
      It is the primary source of energy for most food chains
    • What are the three main factors that a plant needs to photosynthesize?
      Light, water, and carbon dioxide
    • How does the availability of light affect the rate of photosynthesis?
      More light increases the rate of photosynthesis
    • Why is water not considered a limiting factor for photosynthesis?
      Because the amount needed is relatively small compared to transpiration
    • What environmental factors can affect the rate of photosynthesis?
      Temperature and the amount of chlorophyll
    • How does temperature affect the kinetic energy of particles in photosynthesis?
      Higher temperatures increase kinetic energy, leading to more collisions
    • What happens to enzymes at higher temperatures during photosynthesis?
      They can be denatured, reducing the overall rate of photosynthesis
    • How does light intensity affect the rate of photosynthesis?
      More light increases the rate until another factor becomes limiting
    • What occurs at low light intensities regarding the rate of photosynthesis?
      Increasing light intensity initially increases the rate of photosynthesis
    • How does carbon dioxide concentration affect photosynthesis?
      More carbon dioxide increases the rate of photosynthesis
    • What factors can affect the amount of chlorophyll in plants?
      Diseases, lack of nutrients, and loss of leaves
    • What are the interactions of limiting factors in photosynthesis?
      • More than one limiting factor can affect the rate of photosynthesis
      • Rate increases with light intensity, temperature, and carbon dioxide
      • Limiting factors can change as conditions vary
    • What does the inverse square law state about light intensity and distance?
      As distance increases, light intensity decreases
    • How does the inverse square law relate to light intensity when the distance doubles?
      The light intensity decreases to one-fourth
    • What is the formula to calculate light intensity based on distance?
      Light intensity = \( \frac{1}{d^2} \)
    • If a plant is 30 cm from a lamp, what is the light intensity?
      Light intensity = \( \frac{1}{30^2} = 0.001 \) au
    • Why do commercial horticulturists use greenhouses?
      • To control limiting factors of photosynthesis
      • To maximize crop yield and profit
      • To manage costs effectively
    • What are the benefits of growing plants in a greenhouse?
      Increased yield and more frequent harvesting
    • What is the aim of investigating the effect of light intensity on the rate of photosynthesis?
      To measure the volume of oxygen produced by aquatic organisms
    • What is the most common method to measure the rate of photosynthesis?
      Measuring the oxygen released from aquatic plants
    • What should be done to improve the accuracy of measuring oxygen production in photosynthesis experiments?
      Use a gas syringe to collect the volume of gas produced
    • What are the main uses of glucose produced in photosynthesis?
      • Used for respiration
      • Converted into insoluble starch for storage
      • Used to produce fat or oil for storage
      • Used to produce cellulose for cell wall strength
      • Combined with nitrate ions to produce amino acids
    • How can starch be tested in a leaf to show photosynthesis has occurred?
      By using iodine solution to test for the presence of starch
    • What does a positive starch test indicate about a plant?
      That photosynthesis has been taking place
    • When do plants photosynthesize?
      During the day if conditions are right
    • When do plants always respire?
      Plants always respire to release energy
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