Question

18. Why burning of wood and cutting it into small pieces are considered as two different types of changes ?
19. Fill in the blanks.
a. In photosynthesis solar energy is captured by the pigment called..........
b. The inner wall of the small intestine has many finger like at growths called
C. The largest gland in human body is
d. The chemical name of baking soda is............
e. Wind is .....
...........air.
f.
Amoeba digests its food in the ....​

Answer 1

Answer:

18. burning of wood produces ash which is a new product, so it is chemical change. but cutting of wood doesn't produce any new product or leaves a residue so it is a physical change.

19. stomata

villi

liver

sodium hydrogen carbonate

moving

pseudopodia

Explanation:

hope it helps . pls mark it brainliest

Answer 2

Answer:

18-Burning of wood − chemical change because a new substance is formed.

            wood+O2⟶Ashes+CO2+△+light

                                                                     (heat)

Whereas cutting into small pieces is a physical change because there is no change in the composition of the substance and no new substance is formed.

Only the size is reduced.

19 a- chlorophyll

b-Villi

c- Liver

d-Sodium bicarbonate

e-Moving

f- food vacuous

Please mark me as brainlisit