Sound — Science STD 8 — Question

Name two animals which reproduce sexually.

Where and when was oil first struck in India?

Name the endocrine gland which secretes hormone that maintains correct salt balance in the blood.

Fill in the following blanks with suitable words:
In reforestation, the planted trees should be of the same__________ Which were cut down in that forest?

Name the first fully synthetic fibre.

Name the very poisonous gas produced by the incomplete combustion of fuels.

Fill in the following blanks with suitable words:
Satpura National Park is a part of___________ Biosphere Reserve.

Which of the following fuels has the highest calorific value?
Kerosene, Wood, Hydrogen, Cow-dung cakes, LPG

Name the process of the fusion of gametes?

Name the substance which vibrates in a flute to produce sound.