The substances which have very low ignition temperature and can easily catch fire with a flame are called _____________ substances.

Brownish film formed on iron when left in open is called?

In Microsoft Word, _______ allows us to change the color of selected text.

The laws which govern the motion of planets are called ___________________.

For an object, the state of rest is considered to be the state of ______ speed.

_________ is the largest phylum of Animalia which includes insects.

The predominant stage of the life cycle of a moss is the gametophyte which consists of two stages. The first stage is the ___________ stage.

Classes comprising animals like fishes, amphibians, reptiles, birds along with mammals constitute the category called?