4.1.1 Photosynthetic reaction

Question 1

Where does photosynthesis occur?

Answer 1

Leaves

Question 2

Whys are plants green?

Answer 2

Contain chlorophyll which is a green pigment in the chloroplast and is used for photosynthesis

Question 3

Why is the statement ‘Plants photosynthesise by day and respire by night’ false (2p)

Answer 3

• Photosynthesis is not at night because there is no sunlight
• Respiration occurs all the time

Question 4

Where does a plant get most of its mass from

Answer 4

CO2 and H2O

Question 5

Photosynthesis word equation

Answer 5

Carbon dioxide + water —> glucose + oxygen

Question 6

Photosynthesis balanced symbol equation

Answer 6

6CO2 + 6H20 —-> C6H1206 + 6O2

Question 7

Apart from CO2 and H20 what else is needed for photosynthesis (2p)

Answer 7

• chloroplast
• light

Question 8

What type of reaction is photosynthesis?

Answer 8

Endothermic

Question 9

Endothermic reaction

Answer 9

A chemical reaction that absorbs energy from its surroundings, usually in heat, causing the surroundings to feel colder

Question 10

How does water for photosynthesis get to leaves

Answer 10

• Absorbed from the roots

Question 11

How does CO2 for photosynthesis get to leaves

Answer 11

Absorbed through stomata