6. Name three acids and three bases with their formulae.
7. What is acid rain? What are the affects of acid rain?
8. Write a short note on soil profile (layers of soil).
9. List the similarities and differences between aerobic and anaerobic respiration.
10.Why do we often sneeze when we inhale dust laden air?
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three acids- hydrochloric acid (hcl), sulphuric acid (h2so4), nitric acid (hno)
bases- sodium hydroxide (NaOH), magnesium hydroxide(MgOH) zinc oxide(ZnO)
7 when the rain water gets mixed with harmful chemicals like sulphuric and nitric acid then it is called acid rain. It is harmful for crops and also for the marine life. It also causes soil erosion and destroy soil
8 the vertical section of soil with its different layer is called soil profile.
9 the respiration which requires oxygen is aerobic and which doesn't require oxygen is called anaerobic
10 because the sensory nerves in our nose sense them and send message to brain that they are harmful and hence the brain take the quick action
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this loks hardb bro
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