photosynthesis and plant growth

Question 1

1. what is photosynthesis ?

Answer 1

The process plants use to make their own food (glucose) . using the energy from sunlight .

Question 2

2. what kind of chemical reaction is photosynthesis ?

Answer 2

photosynthesis is an endothermic .

Question 3

3. what is the main product produced during photosynthesis?

Answer 3

Glucose

Question 4

4. what is glucose stored as ?

Answer 4

Glucose is stored as starch

Question 5

5. what reagent is tested for starch ?

Answer 5

Iodine solution is a test for starch

Question 6

why are there not many plants in sandy deserts ?

Answer 6

This is because there is no water .

Question 7

what are the raw materials for photosynthesis ?

Answer 7

The raw materials are carbon dioxide and water

Question 8

what are the product for photosynthesis ?

Answer 8

The products are glucose and oxygen

Question 9

what makes chloroplast green ?

Answer 9

Chlorophyll

Question 10

all organism carry out seven life process ,

Answer 10

M = Movement 
R = Respiration 
S = Sensitivity 
G = growth 
R = Reproduction 
E = Excretion 
N = Nutrition

Question 11

write the word equation for photosynthesis

Answer 11

Carbon dioxide + water –> glucose + oxygen

Question 12

what gas from the air need to enter leaves through a stomata , for photosynthesis ?

Answer 12

Carbon Dioxide

Question 13

what cells Bring the liquid raw material for photosynthesis into a leaf ?

Answer 13

xylem cells

Question 14

How oxygen gets out of a leaf ?

Answer 14

Through stomata

Question 15

why is light not a raw material for photosynthesis ?

Answer 15

This is because it is not a chemical substance

Question 16

what are the four elements that a plant needs grow and develop ? what are the functions ? what happens if they didn’t get the elements ?

Answer 16

1. Nitrogen . Function :To make Protein . effect : stunned growth
2. Magnesium . Function : To make chlorophyll . Effect : without chlorophyll plant can’t photosynthesis.
3. potassium . Function : absorbs water for photosynthesis . effect : the plants will become brown without water
4. phosphorus . Function : for respiration and growth . Effect : stunned growth .

Question 17

what are the risk when using iodine solution ? how to control the risk?

Answer 17

Stains skin and clothes

how to : Don’t touch the iodine solution with bare hands and keep clothes away from iodine solution .

Question 18

what else do plants take in other than water and carbon dioxide

Answer 18

nitrate and it used for growth