Question

photosynthesis worksheet
word bank
stroma
light dependent reactions
atp
light - independent reactions
chloroplast
sun
nadph
water
thylakoids
oxygen
glucose
carbon dioxide
directions: use the word bank to answer questions 3 - 9.

1. write the chemical equation for photosynthesis below (using chemical formulas):
2. write the chemical equation for photosynthesis below using words (carbon dioxide instead of co₂):
3. energy captured in photosynthesis comes from the _.
4. photosynthesis occurs inside the _ of a plant cell.
5. the first step of photosynthesis is called the _ _ _ and they occur in the _ of the chloroplast.
6. the second step of photosynthesis is called the _ _ _ and they occur in the _ of the chloroplast.
7. during the light - dependent reactions, _ is split and produces _ as a waste product.
8. the two energy carriers _ and _ are made in the light - dependent reactions and then are used to power the light - independent reactions (calvin cycle).
9. during the light - independent reactions, _ _ reacts with atp and nadph to produce the sugar _.

Explanation:

• Question 3: In photosynthesis, the sun is the source of energy.
• Question 4: Chloroplasts are the organelles where photosynthesis occurs in plant cells.
• Question 5: The first step is the light - dependent reactions, which take place in the thylakoids of the chloroplast.
• Question 6: The second step is the light - independent reactions (Calvin cycle), occurring in the stroma of the chloroplast.
• Question 7: During light - dependent reactions, water is split, and oxygen is produced as a waste product.
• Question 8: ATP and NADPH are the energy carriers made in light - dependent reactions.
• Question 9: In light - independent reactions, carbon dioxide reacts with ATP and NADPH to produce glucose.

Answer:

1. sun
2. chloroplast
3. light dependent reactions; thylakoids
4. light - independent reactions; stroma
5. water; oxygen
6. ATP; NADPH
7. carbon dioxide; glucose