Why does our body need water ? Explain with an example.

Why does a plant need water?

How do fish swim in water ? Explain it with an example.

Read the flow chart given below. What does it indicate? Explain with an example.

Explain the formation of any two compounds according to Kosseľs theory. How does ionisation bond form? Explain with an example. Explain the formation of NaCl. Explain the formation of CaO.

What is natural selection ? How does it direct the evolution ? Explain with an example.

Do you think body's team work maintains functioning of our body ? Justify your answer with an example.

How water can be used in eparation of different substances ? Explain with example.

How does periplaneta conserve water ? Explain it with the help of excretion in it .

Why alloyong is preferred for metals? Explain with examples.

Do you think body's team work maintains functioning of our body? Justify your answer with an example.