A
What is photosynthesis?
The process by which plants make their own food (glucose) using light energy, carbon dioxide, and water.
What is the function of the chloroplast?
It is where photosynthesis takes place.
What carbohydrate is produced during photosynthesis?
Glucose.
What gas is released during photosynthesis?
Oxygen.
What is chlorophyll?
A green pigment in plants that captures light energy for photosynthesis.
Write the word equation for photosynthesis.
Carbon dioxide + Water → Glucose + Oxygen (in the presence of light and chlorophyll).
Which green pigment is found inside the chloroplast?
Chlorophyll.
How do plants store excess glucose?
As starch.
Why is oxygen important for living things?
It is used in respiration to release energy.
Which mineral is needed by plants to make chlorophyll?
Magnesium.
Where in the plant cell does photosynthesis take place?
In the chloroplasts.
Why is chloroplast mostly found in the leaf?
Because leaves receive the most sunlight for photosynthesis.
What is the main use of glucose in plants?
For respiration to release energy.
How could you prove that oxygen is released during photosynthesis?
Collect bubbles from an aquatic plant and test with a glowing splint; it relights in oxygen.
What happens to a plant that lacks magnesium?
It turns yellow (chlorosis) because it cannot make chlorophyll.
How does light intensity affect the rate of photosynthesis?.
Higher light intensity increases the rate of photosynthesis up to a certain point
What would happen to a plant if its chloroplasts were damaged?
The plant could not photosynthesize and would die.
Explain how photosynthesis supports the food chain.
It produces carbohydrates that serve as the base of all food chains.
Explain the relationship between photosynthesis and respiration.
Photosynthesis produces oxygen and glucose used in respiration; respiration releases carbon dioxide and water used in photosynthesis.
Why is chlorophyll important for photosynthesis?
It absorbs light energy needed to make glucose.
Explain how the starch test provides evidence that photosynthesis has taken place.
If a leaf turns blue-black after iodine is added, it shows starch was made — evidence that photosynthesis occurred.
Describe the role of light in the chloroplast during photosynthesis.
Light provides energy for the conversion of carbon dioxide and water into glucose.
Describe how the starch test can help identify areas of photosynthesis in a leaf.
Only areas exposed to light produce starch and turn blue-black with iodine.
Predict what would happen to oxygen levels if all plants stopped photosynthesizing.
Oxygen levels would drop and most living organisms would die.
Describe how both magnesium and nitrates are important for healthy plant growth.
Magnesium is needed to make chlorophyll for photosynthesis; nitrates are needed to make proteins for growth.