Phototsynthesis

Question 1

What is photosynthesis?

Answer 1

an endothermic reaction in which energy is transferred to chloroplasts from the environment

Question 2

Where does photosynthesis happen?

Answer 2

in the chloroplast , a green pigment called chlorophyll absorbs light energy

Question 3

Equation for photosynthesis

Answer 3

carbon dioxide + water = glucose + oxygen

Question 4

4 steps in photosynthesis

Answer 4

1. energy is transferred from the environment to the chloroplast by light
2. this energy is then transferred to convert carbon dioxide from the air + water from the soil into a simple sugar or glucose
3. the chemical reaction also produces oxygen gas
4. the oxygen is then released to the air to breathe

Question 5

What does photo stand for?

Answer 5

light

Question 6

What does synthesis stand for?

Answer 6

to make

Question 7

How are leaf’s adapted?

Answer 7

most leaves are broad giving them a big surface area for light to fall on
contain chlorophyll to absorb light
have veins which bring in water

Question 8

How is algae adapted?

Answer 8

• large surface area and absorb carbon dioxide dissolved in water around them
• the oxygen they produce also dissolved in the water around them as it’s released

Question 9

What are the factors affecting photosynthesis?

Answer 9

Temperature
carbon dioxide concentration
light intensity
chlorophyll concentration

Question 10

Temperature

Answer 10

as temp increases so does the rate of photosynthesises beacuse more energy is provided for the reaction

Question 11

Carbon dioxide concentration

Answer 11

as the rate of co2 increases so does the rate of photosynthesis

Question 12

Light intensity

Answer 12

as light increases so does the rate of photosynthesis

Question 13

Chlorophyll concentration

Answer 13

leaves with more chlorophyll better absorb the light so rate of photosynthesis increases

Question 14

Converting glucose

Answer 14

starch
fats
cellulose
proteins