PHYSICS CH4 Electric Charge and Electric Current — Science STD 9 — Question

Mention the main problems of harvesting mushrooms.

A portable radio has a built in transformer so that it can work from the mains instead of batteries. Is this a step up or step down transformer? Give reason.

Name any two appliances which work under the principle of heating effect of current.

What is nematocyst?

Differentiate the following.

Ingestion and Egestion

Nitric Acid is a constituent of baking powder.

Reproductive organs are also considered endocrine glands.

Name two inorganic carbon compounds which are used as an antacid?

100+273=373 K \cdot \text { ie. }{ }^{\circ} C +273

Differentiate Extensive and Intensive Fish culture.