Question

4. Make meaningful sentences using the given keywords.
a. Oxygen,heaviest,atmosphere,element
ans. ______________________________
b. Photosynthesis,burning,respiration,oxygen
ans. _______________________________
c. Animal,water, oxygen,respire,dissolved
ans. _______________________________

❤ 三三​

Answer 1

Explanation:

a) ans:- Oxygen is not the heaviest element in atmosphere

Answer 2

Answer:

oxygen is essentials for burning and respiration