Unit Two: Photosynthesis 🍃

Question 1

Is photosynthesis exothermic?

Answer 1

No, It is Endothermic.

Question 2

what does photosynthesis take place in?

Answer 2

the chloroplasts

Question 3

what does photosynthesis combine to create glucose (to use as food)?

Answer 3

Water and Carbon Dioxide

Question 4

what is given off as a by-product of photosynthesis?

Answer 4

Oxygen

Question 5

what energy source is trapped by chlorophyll?

Answer 5

Sunlight (or any light)

Question 6

what is the word equation for photosynthesis?

Answer 6

carbon dioxide + water (light/chlorophyll)= glucose + oxygen

Question 7

what’s the chemical equation for photosynthesis?

Answer 7

CO2+H2O=C6h12o6 + O2

Question 8

what’s the balanced chemical equation for photosynthesis?

Answer 8

6Co2 + 6H2o = C6h12o6 + 6O2

Question 9

what ways can the plant use the glucose produced during photosynthesis?

Answer 9

use to produce energy, stored as starch, can be converted into protein or cellulose

Question 10

what happens when a plant is placed in a bag with sodium hydroxide/soda lime?

Answer 10

the plant will produce no starch as no Co2 will be present so photosynthesis can occur. if this leaf was tested for starch it would likely not turn blue-black.

Question 11

what happens when a plant is placed in a bag with sodium hydrogen carbonate?

Answer 11

this plant will produce lots of starch as lots of Co2 is present. a leaf from this plant when tested for starch would turn blue-black.

Question 12

what structures are present inside a leaf?

Answer 12

the epidermis, waxy cuticle, palisade mesophyll, the spongy mesophyll, xylem, phloem, stomata and guard cell

Question 13

what are leaves usually adapted for?

Answer 13

light absorption and gas exchange.

Question 14

what is a limiting factor?

Answer 14

if one or more factor is in short supply, the rate of photosynthesis is limited, this is called the limiting factor/s

Question 15

what is respiration?

Answer 15

when oxygen is consumed and carbon dioxide is released

Question 16

what is photosynthesis in basic terms?

Answer 16

when carbon dioxide is consumed and oxygen is released

Question 17

can photosynthesis and respiration occur at the same time?

Answer 17

yes

Question 18

is respiration or photosynthesis faster during the daylight?

Answer 18

photosynthesis > respiration

Question 19

is respiration or photosynthesis faster in the dark?

Answer 19

respiration > photosynthesis

Question 20

is respiration or photosynthesis faster during dawn/dusk?

Answer 20

Respiration = Photosynthesis

Question 21

what is taken in during respiration?

Answer 21

oxygen

Question 22

what’s given out during photosynthesis

Answer 22

oxygen

Question 23

what’s given out during respiration?

Answer 23

carbon dioxide

Question 24

what is the compensation point?

Answer 24

where the rate of photosynthesis and respiration are equal so there is no net gas exchange

Question 25

what is hydrogen carbonate indictor used to determine?

Answer 25

movement of oxygen and carbon dioxide in and out of plants

Question 26

what conditions turn hyrdrogen carbonate indicator red?

Answer 26

normal atmospheric carbon dioxide levels

Question 27

what conditions turn hydrogen carbonate indicator yellow?

Answer 27

increase in carbon dioxide levels (more acidic because carbon dioxide is acidic)

Question 28

what conditions turn hydrogen carbonate indicator purple?

Answer 28

decrease in carbon dioxide levels (more alkaline)