Conservation of Plants Animals — Science STD 8 — Question

Differentiate between the following. Zoo and wildlife sanctuary.

Make a labelled diagram of a candle flame.

When an object is touched with the metal top of an electroscope, its aluminium leaves diverge. What conclusion do you get from this observation?

Write about the extraction of coal.

Yeast is very useful for baking industry. Elucidate the role of yeast.

Suggest three measures to limit noise pollution in your locality.

What is meant by ‘combustion’? Explain with an example.

Why is the more necessary for adolescents to take bath regularly (at least once every day)?

Explain why, distilled water does not conduct electricity but tap water conducts some electricity.

The quality of air at various locations is monitored regularly by government and other agencies. In what way can you use these data?