7.5 Photosynthesis Notes
How does the rate of photosynthesis change when the light source is moved from a distance of 5 cm to 20 cm?
At 5 cm, the process was quicker then it was at 20 cm because of the amount of radiant energy. It was slow at 20 cm.
What interaction between matter and energy occurs during the process of photosynthesis?
The radiant energy from the sun fuels the chemical reaction where carbon dioxide and water turn into glucose and oxygen.
What are the reactants of photosynthesis?
carbon dioxide and water
What do leaves lose in fall?
chlorophyll
Where is pigment located?
chloroplasts
What is the source of water as as reactant in photosynthesis?
the soil
How does the water enter the plant?
through the plan's roots
true or false: Sunlight is a form of energy.
true
Put the meaning of the Greek origin words "synthesis" and "photo" together to explain the meaning of the word "photosynthesis."
'Photo' means 'light.' 'Synthesis' means 'put together to form something new. Photosynthesis means 'put together to form something new from light.'
How many hydrogen atoms in total appear as any part of the products?
12
How many hydrogen atoms in total appear as any part of the reactants?
12
How many oxygen atoms in total appear as any part of the products?
18
How many oxygen atoms in total appear as any part of the reactants?
18
How many carbon atoms in total appear as any part of the products?
6
How many carbon atoms in total appear s any part of the reactants?
6
What is the chemical formula for photosynthesis?
6CO2 + 6H2O + light energy --> C6H12O6 + 6O2
What part does chlorophyll play un the photosynthesis process?
Chlorophyll takes part in the action of transforming radiant energy to chemical energy
Lab: How does this investigation demonstrate plants giving off oxygen during photosynthesis? Use your observations to form your answer.
When a plant receives radiant energy and water, a chemical change forms from the carbon dioxide and water and creates a different matter of glucose and oxygen. This plant did the same thing.
How does the rate of photosynthesis change when sodium bicarbonate is added to the water?
When sodium bicarbonate is added, the process was at a very rapid rate. When sodium bicarbonate is put in water, it dissolves and produces carbon dioxide. This will quicken because a plant needs carbon dioxide to make oxygen. More carbon dioxide results in more oxygen which quickens the rate of photosynthesis.
What is a stomata?
a pore found in the epidermis of leaves, stem, and other organs, that facilitates gas change
What do chloroplasts do?
absorb light energy and covert it to chemical energy
What is the smallest particle of an element, made of protons, neutrons, and electrons?
atom
How do we see color?
because of the color that is refracting from a light
What do autotrophs do?
generate their own organic matter through photosynthesis
How do humans benefit from plants going through photosynthesis?
one of the products of photosynthesis is oxygen. Humans need oxygen to survive
Why does it make sense to call oxygen a by-product of photosynthesis?
oxygen is one of two products of photosynthesis but is not in glucose
What are substances that absorb visible light?
pigments
FIll in the blank: Sunlight is captured by _______.
pigments (chlorophyll and others)
What is sunlight measured in?
wavelengths
Use your understanding of photosynthesis to follow and describe how carbon ends up in the stomach of a rabbit. Include where carbon enters the process and what form it is in as well as the steps of what happens to the carbon throughout the process
Carbon is in carbon dioxide. In photosynthesis, carbon dioxide and water change into glucose and oxygen. Carbon is in glucose and glucose is in a plant. A rabbit eats this plant which goes into the rabbit's stomach. This is how carbon ends up in a rabbit's stomach.
Predict what would happen on Earth if an explosive action, for example, an asteroid crash forced material into the atmosphere such that the amount of radiant energy was significant;y reduced for many years.
If the amount of radiant energy was reduced, a plant's process of photosynthesis would slow down. Also, humans may use more oxygen and it would take a longer time for a plant to produce oxygen. This would take a longer time for a plant to produce oxygen. This would lead to less oxygen which would lead to species dying out through time.
Is matter created or destroyed during the photosynthesis process? Explain your answer.
Matter is created because during the interaction between radiant energy and matter (carbon dioxide and water), there is a chemical reaction with the result of glucose (type of sugar) and oxygen (by-product and different matter)
Explain how the model shows storage of chemical energy.
No atoms were gained or lost
Plants are frequently classified as Producers because of the process of photosynthesis. Explain why this is an appropriate title.
Plants produce oxygen and glucose which are products that are necessary for human and animal life.
How does radiant energy become food for a plant?
Radiant energy becomes chemical energy/ Carbon dioxide and water become glucose and oxygen
What role does the Sun's energy play in the process of photosynthesis?
The Sun is radiant energy which is changed into chemical energy when carbon dioxide and water react
What are the products of photosynthesis?
glucose and oxygen (by-product)
What color is chlorophyll?
green
After the transformation from radiant energy, where is the chemical energy stored?
in the newly formed substances of sugar and oxygen
What acts as the radiant energy collector in a plant?
leaves
fill in the blank: These pigments in ______ are responsible for the vivid _____ changes in the fall.
leaves, color
What is the smallest particles that has the properties of the compound?
molecules
Were any carbon atoms gained or lost as a result of photosynthesis?
no
Were any hydrogen atoms gained or lost as a result of photosynthesis?
no
Were any of the oxygen atoms gained or lost as a result of photosynthesis?
no
Are all of the atoms used to create the glucose?
no, the oxygen is in the air
Do you think the process of photosynthesis only occurs one time in a plant leaf?
no, the process will always happen if the plant is receiving radiant energy
What is a substance produced during a chemical reaction
product
What is a substance that takes part and undergoes change during a chemical change?
reactant
How does carbon dioxide enter the plant?
stomata of the leaves
What is the power for photosynthesis?
sunlight
What is the source of the carbon dioxide as a reactant in photosynthesis?
the atmosphere (air)
Why do leaves turn yellow and orange in fall?
the lack of chlorophyll allows yellow and orange pigments to be visible
