Question

1. What are decomposers? Write their importance with respect to our
environment
2. Write the causes of depletion of ozone layer. How can we prevent it?
3. Explain the formation of ozone layer.
4.1) Name the blood vessel that brings oxygenated blood to the human
heart
11) Which chamber of the heart received oxygenated blood?
III) Explain how is the oxygenated blood from this particular chamber
sent to all the body parts?
5. What is the advantage if a four chambered heart?
6 What do you mean by neutralization reaction? Give two examples
7. Rain water conducts electricity but distilled water does not. Why?
8. Why don't we keep sour substances in brass and copper vessels?
9. What happens when baking soda is heated?
10. What is universal indicator?​

Answer 1

Explanation:

Decomposers and scavengers break down dead plants and animals. They also break down the waste (poop) of other organisms. Decomposers are very important for any ecosystem. If they weren't in the ecosystem, the plants would not get essential nutrients, and dead matter and waste would pile up.