Photosynthesis and cellular respiration both take part in the carbon cycle. Carbon dioxide is a reactant in photosynthesis and a product in cellular respiration. Glucose (sugar) is a product in photosynthesis and a reactant in cellular respiration.
The carbon cycle includes multiple processes that help move carbon through the environment. Carbon is stored in the environment in various ways. For example, carbon is stored in the atmosphere as part of carbon dioxide gas, which acts as a greenhouse gas that keeps our planet warm. Carbon is also stored in living organisms in a variety of molecules, one of which is a sugar called glucose. Carbon moves among living organisms when one organism eats and digests another, and it also moves back and forth between organisms and the atmosphere. Chemical reactions such as photosynthesis and cellular respiration help carbon move from one type of molecule to another type of molecule.1. Select the correct terms from the drop down boxes.
Photosynthesis and cellular respiration both take part in the carbon cycle. Carbon dioxide is a ______ in photosynthesis and a ______ in cellular respiration. Glucose (sugar) is a _____ in photosynthesis and a ______ in cellular respiration.
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2. A student is completing an experiment comparing plants in two areas. Both areas have the same type of plants with equal sunlight and equal available water. Consider how the following changes might affect the photosynthesis rate for the plants in area 2.
(Area one: same sunlight, same water, same plant.)
(Area two: same sunlight, same water, same plant.)
a. What would happen if the student reduced the amount of carbon dioxide available for plants in area 2?
The plants in area 2 would have a lower rate of photosynthesis than the plants in area 1.
The plants in area 2 would have a faster rate of photosynthesis than the plants in area 1.
The plants would both experience a reduced rate of photosynthesis.
The plants would have the same rate of photosynthesis.
(Area one: same sunlight, same water, same plant.)
(Area two: same sunlight, same water, same plant.)
a. What would happen if the student reduced the amount of carbon dioxide available for plants in area 2?
The plants in area 2 would have a lower rate of photosynthesis than the plants in area 1.
The plants in area 2 would have a faster rate of photosynthesis than the plants in area 1.
The plants would both experience a reduced rate of photosynthesis.
The plants would have the same rate of photosynthesis.
If the student reduced the amount of carbon dioxide available for plants in area 2, the correct statement would be:
The plants in area 2 would have a lower rate of photosynthesis than the plants in area 1.
This is because carbon dioxide is a crucial reactant in the photosynthesis process, and a reduction in its availability would limit the plants' ability to produce glucose and oxygen.
b. What would happen if the student increased the carbon dioxide available for the plants in area 2?(1 point)
The plants in area 2 would photosynthesize faster than the plants in area 1.
The plants in area 2 would photosynthesize slower than the plants in area 1.
The plants in area 2 would stop photosynthesizing.
The plants in area 1 would stop photosynthesizing.
The plants in area 1 would stop photosynthesizing.
The plants in area 2 would photosynthesize faster than the plants in area 1.
The plants in area 2 would photosynthesize slower than the plants in area 1.
The plants in area 2 would stop photosynthesizing.
The plants in area 1 would stop photosynthesizing.
The plants in area 1 would stop photosynthesizing.
If the student increased the carbon dioxide available for the plants in area 2, the correct statement would be:
The plants in area 2 would photosynthesize faster than the plants in area 1.
This is because an increase in carbon dioxide availability can enhance the rate of photosynthesis, assuming other factors (like sunlight and water) remain constant.
Some organisms, such as green plants, have special organelles in their cells called chloroplasts. Chloroplasts can use the energy from sunlight to "drive" a chemical reaction that uses carbon dioxide and water as reactants. The atoms in the carbon dioxide and water molecules are rearranged by the reaction. When the atoms are put back together, they form different molecules called glucose (a type of sugar) and oxygen gas. The glucose can be used as a food source and building block for the plant as well as for any animals who later eat the plant. In this way, chloroplasts allow green plants to take non-food molecules and rearrange their atoms to form food molecules. 3. Choose the term from each drop down box that correctly completes each sentence.
Green plants are categorized as _____ because they _____.The process by which this occurs is called ______
Green plants are categorized as _____ because they _____.The process by which this occurs is called ______
Green plants are categorized as autotrophs because they produce their own food using sunlight, carbon dioxide, and water. The process by which this occurs is called photosynthesis.
Read the following passage.The law of conservation of energy tells us that energy is neither gained nor lost during ordinary chemical or physical processes. This means any chemical reaction that occurs will not result in a net gain or net loss of energy, though the energy may change forms and may be used in new ways.4a. During photosynthesis and cellular respiration, energy is ______.
destroyed
decreased
conserved
increased
destroyed
decreased
conserved
increased
During photosynthesis and cellular respiration, energy is conserved.
This means that energy is not created or destroyed; it simply changes forms during these processes.
Photosynthesis and cellular respiration are both chemical processes in which atoms are rearranged and put back together in new ways. Energy does change forms during these processes. These processes take place in specialized cell structures called organelles. Drag and drop the correct phrases into the blanks. Which organelles are involved in these energy conversions?
4b. Photosynthesis takes place in _______. Cellular respiration takes place mostly in _______.
4b. Photosynthesis takes place in _______. Cellular respiration takes place mostly in _______.
4b. Photosynthesis takes place in chloroplasts. Cellular respiration takes place mostly in mitochondria.
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