b4

Question 1

what do plants use for there source of energy

Answer 1

plants use light

Question 2

what is the reaction plants use to trap light energy is called

Answer 2

photosynthesis

Question 3

is Photosynthesis an endothermic and exderthermic reaction

Answer 3

endothermic reaction because it takes in energy

Question 4

where does Photosynthesis take place in a plant

Answer 4

the leaves

Question 5

what do the leaves of the plant contains

Answer 5

a green substance chlorophyll chlorophyll can absorb light energy

Question 6

what’s the word equation for Photosynthesis

Answer 6

carbon dioxide + water with little light (chlorophyll) glucose + oxygen

Question 7

what happens if we only keep increasing the light intensity in Photosynthesis

Answer 7

the rate of Photosynthesis will no longer increase due to the light intensity bing the limiting factor

Question 8

what can effect the rate of Photosynthesis

Answer 8

the amount of chlorophyll in the leaf

Question 9

name off the Photosynthesis limiting factor

Answer 9

Light intensity, carbon dioxide concentration and temperature

Question 10

what happens if we keep on increase the temp

Answer 10

the enzyme will denature and the rate of Photosynthesis will fall

Question 11

what is use for the glucose

Answer 11

to release energy in respiration

Question 12

were does respiration take place

Answer 12

in the mitochondria

Question 13

glucose produced by Photosynthesis is to produce

Answer 13

the insoluble storage molecule starch

Question 14

when can the starch be converted

Answer 14

it can be converted back to glucose at night by the plant when it is needed

Question 15

what is cellulose

Answer 15

is in the plant wall which gives it strength

Question 16

does glucose prudence amino acids

Answer 16

yes

Question 17

to make amino acid from glucose what do the plant need to do

Answer 17

absorb nitrate ions from the soil

Question 18

why is a LED light used in the Photosynthesis practical

Answer 18

because it dissent use that much heat to much heat will change the temp of the experiment

Question 19

if we use a normal light what do we have to do in the Photosynthesis practicle

Answer 19

we have to put a beaker of water in form of the light it aborbs the heat of the lamp

Question 20

Photosynthesis practical

Answer 20

we place a led light source at the end of the ruler at 0 cm and the boiling tube at 10cm we fill it up with sodium hydrogen carbonate solution which release carbon dioxide with needed for Photosynthesis then we place a bit of pondweed in the boiling tube with a cut end on it then we now leave it for 5 mins we should see bubble of mass being produced fro the end of pondweed the glass is oxygen with is produced by Photosynthesis the we get a stop watch and count the amount of bubble produced in one minute we repeat it 2 time at calculate the whole mean from it then reap the whole thing again at 20cm 30cm and 40cm

Question 21

what are the problems pf the Photosynthesis practical

Answer 21

the bubble might be tp fast to count accurately the bubble are not the same size

Question 22

what do we use if we want to find the right amount of bible produced in the Photosynthesis practical

Answer 22

we use a measuring cylinder and a funnel and we acth the bubble in the measuring cylinder filled with water the use the measuring cylinder to calculate the value of it produced

Question 23

is respiration and endothermic or a exothermic reaction

Answer 23

its a exothermic because it relates energy

Question 24

is aerobic respiration using oxygen or without oxygen

Answer 24

oxygen

Question 25

aerobic respiration reales a

Answer 25

grat deal of energy because the glucose molecule has been fully oxidised

Question 26

when there's a shortage of oxygen muscle cells repair

Answer 26

anaerobically

Question 27

does anaerobic respiration release oxygen

Answer 27

no it docent

Question 28

does anaerobic respiration release more or less energy

Answer 28

less energy

Question 29

why in anaerobic respiration releases less energy then aerobic respiration

Answer 29

its because in anaerobic respiration the oxidation if glucose if incomplete

Question 30

where can anaerobic respiration also take place in

Answer 30

in plants and yeast

Question 31

the word equation for aerobic respiration

Answer 31

glucose +oxygen gives out carbon dioxide = water

Question 32

the word equation for anaerobic respiration

Answer 32

glucose gives out lactic acids

Question 33

when the body needs more energy which type of respirations increases

Answer 33

aerobic respiration

Question 34

what happens if we are excising to hard

Answer 34

not enough oxygen can be supplied to the muscles and anaerobic respiration takes place

Question 35

what does the lactic acid make the muscles do

Answer 35

to become more fatigued courses the muscles not storm contrasting efficiently

Question 36

what does it create when the body has to remove the lactic acid from the muscles

Answer 36

oxygen debt

Question 37

what is metabolism

Answer 37

its the sum of all chemic reactions in a cell and the body

Question 38

is respiration a chemical reaction

Answer 38

yes