Plant Respiration and Photosynthesis

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Plant Respiration and Photosynthesis

• Lesson 14

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Plant Respiration

• All plants and animals need energy for cells to
  do their job. Animals get energy form the food
  that they eat. Plants can make their own food.

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• In plants, making food and releasing energy from
  food are connected.
• During photosynthesis, plants make their own
  food.
• During Respiration, food is changed into energy
  that is released. Both plants and animals use
  respiration.

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• Photosynthesis and respiration both involve the
  exchange of gases.

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Respiration

• Respiration is the process of breaking down a
  sugar called Glucose to get energy that cells can
  use. Plants and animals need oxygen to release
  the energy in glucose. As cells use glucose, it
  breaks down to make carbon dioxide and water. The
  carbon dioxide is released into the air. Some of
  the water is released as a gas called water
  vapour.

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• Glucose Oxygen ?Carbon dioxide water energy
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• C6 H12O6 O2 ? CO2 H2O energy

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• Animals exchange oxygen and carbon dioxide in the
  lungs.
• Plants exchange the gases through their leaves.
  Stomata are tiny openings on the bottom surface
  of the leaf. These small holes open and close to
  allow water vapour and other gases to pass.

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• Place these statements in the correct order.
  (Number 1-4 in the correct order)

As it gets used, glucose breaks down to make carbon dioxide and water
Plants need oxygen to release the energy in glucose
Carbon dioxide and water vapour is released into the air
During respiration, glucose is broken down into energy that cells can use
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1
4
2
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Photosynthesis

• Plants make their own food. The food they make is
  called glucose, which is produced by
  photosynthesis. During this process, the
  chloroplasts in the leaves of green plants
  capture energy from sunlight.

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The picture shows the process of photosynthesis

• The plant takes in water and carbon dioxide and
  uses energy from sunlight to make glucose. Oxygen
  is also produced in this process. The oxygen is
  released from the leaves into the air.

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The equation shows what happens during
photosynthesis

• Carbon dioxide Water Energy ? Glucose
  Oxygen
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• CO2 H2O Energy ? C6 H12O6 O2

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• Any food that is not needed right away for energy
  is stored for later use. The glucose is stored in
  the form of starch

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• Questions
• What does a plant need to make glucose?
  ____________ , ______________and _____________
• What does photosynthesis produce?
  __________________________and __________________

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Respiration and Photosynthesis connection

• Use the diagram to find out how respiration and
  photosynthesis work together to help plants
  survive
• The plant needs to make its own food.
  Photosynthesis produces glucose and stores energy
• The plant needs to use the stored energy for
  respiration. Respiration breaks down glucose and
  releases energy. The plant uses this energy to
  grow and do its work.

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Respiration and Photosynthesis connection
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• LAB