Questions

Foliated rocks are distinguished by layers.

Sound waves cannot travel through a Vacuum.

A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.

The primary agent of contact metamorphism is heat or temperature.

The shape of the nucleus is maintained by the nuclear lamina.

The basic concept in economics is that all resources are limited.

Many toxic gases along with water vapour are emitted in vocanic eruptions. All such toxic gases include hydrochloric acid, sulfur dioxide, carbon dioxide, hydrogen sulfide and carbon monoxide. Methane is not produced in the volcanic eruptions.