__________ acts as a shield absorbing ultraviolet radiation from the sun.

What is the process of rust forming on iron called?

Kelvin (K) is the unit of measurement of ________.

_______ optical data storage is a technology where data is stored in multiple layers in the optical disc.

The sliding friction is _______________ than the static friction.

If the orbit of a planet is an ellipse then what is the point at which the Sun is located called?

Animals like annelids and arthropods etc where the body can be divided into identical left and right halves in only one plane, exhibit ________ symmetry.

_______ are chlorophyll-bearing, simple, thalloid, autotrophic and largely acquatic (both fresh water and marine) organisms.