- Oxygen cycle is the cycle which maintains the level of oxygen in the atmosphere.
- Oxygen from the atmosphere is used up during combustion, respiration and in the formation of oxides of nitrogen.
- This oxygen is returned to the atmosphere by lithosphere.
- This forms the oxygen cycle in nature.
Hope you could get an idea from here.
Doubt clarification - use comment section.
Answer:
1-5
2-6
3-4
Explanation:
i may be smart i don't know
Answer: Food webs are bigger, food chain is smaller.
Explanation:
Food webs are multiple food chains into one web.
Easy:
1. 2K + Br2 — KBr
2. 4Sb + 3O2 — SB4 O6
Medium:
1. 2Na+2H2O — 2NaOH+H2
2. 2KNO3 — 3KNO2+O2
Hard:
1. 4NH3+5O2 — 4NO+6H2O
2. C2H5OH+3O2 — 2CO2+3H2O
Explanation:
the eggs seems to be rotten because when we add enough salt into water the density of water becomes greater than that of egg ,hence the floats and seems to be rotten
