Photosynthesis

Question 1

what is photsynthesis

Answer 1

THE PRODUCTION OF CARBON COMPOUNDS IN CELLS USING LIGHT ENERGY
- photosyntehsis uses light energy to create chemical energy needed for life

Question 2

formula for photosynthesis

Answer 2

C02 + H20 -> 02 + C6H12O6

carbon dioxide + water-> oxygen + glucose

Question 3

why are leaves green

Answer 3

1. chlorphyll in chlorplasts
2. the visible spectrum of the electromagnetic (the middle is green, and light energy is needed to produced carbon compounds from carbon dioxide)

Question 4

what is photosynthetic pigment

Answer 4

coloured biological compound that is present in chlorplatsa and photosynthetetic bacteria, and which capture light energy for photosynthesis

Question 5

range of visible light

Answer 5

violent= shortest 
red= longest

Question 6

main three regions of the visible light spectrum

Answer 6

• red
• green
• blue

Question 7

what do substances do when struck by the wavelength

Answer 7

• absorb it

- reflect it

Question 8

why is chlorophyll green

Answer 8

• absorbs the other colors of the spectrum and reflects the green light

Question 9

first stage of photosynthesis

Answer 9

• light dependent reactions occur where chlorophyll absorbs light energy and converts that energy to ATP

Question 10

how is oxygen produced in photosynthesis

Answer 10

• through the photolysis of water, where oxygen is released form the plant as a waste product

Question 11

second stage of photosynthesis

Answer 11

• light indepednent reactions
• ## ATP and hydrogen are used to convert carbon dioxide and water into useful organic molecules

Question 12

limiting factors of photosynthesis (draw graphs)

Answer 12

• light intensity
• temperature
• carbon dioxide concentration
• water concentration

Question 13

action and absorption spectrum (draw it)

Answer 13

absorption spectrum of chlorophyll corresponds with the action spectrum of photosynthesis

Question 14

measure the rate of photosynthesis

Answer 14

rate= change/time

Question 15

changes to the earths atmosphere, oceans and rock desposition

Answer 15

ATMOSPHERE:
- preearth had only 2% oxygen= no life
- cyanobacteria were the first to produce photosynthesis
- ozone layer formation through oxygen
OCEANS:
-oxygen sinks (oxidizes compounds)

ROCK DESPOSITION:
-banded iron formations in rocks due to insoluble iron oxides

Question 16

chromotography formula

Answer 16

distance travelled by pigment/distance travelled by solvent

Question 17

what is energy needed in photosynthesis for

Answer 17

to prouced carbon carbohydrates and other carbon compounds from carbon dioxide