Explore topic-wise MCQs in Science.

The most common activity to conserve natural resources is by

Many of today's maps are made by

A way of collecting information about something without physically being there is known as

Magnetic declination is measured in

A fixed point on Earth's surface from which direction and location can be described is known as

A map projection that is made when the contents of the globe are moved onto a cylinder of paper is called

The volume of a liquid is often given in

The number of general types of oceanography is

Optical telescope was first built by

The density of water in kg/m³ is

The study of origin, history and structure of earth is known as

The main disadvantage of fusion is that it needs

The types of coal are

Many trains in 1800s and early 1900s used

Another major problem of nuclear power plant is

When the sea organisms die, their remains settle on the ocean floor and they become a part of

A substance made up of two or more elements chemically combined together is known as

The greater the resistance of minerals of being getting scratched,

The process by which mined land is returned to its original state or better is known as

The two groups of minerals are

Rocks and minerals are mined by

Each mineral has a

On Mohs hardness scale, the rating of diamond is

An example of silicate minerals could be

Metals can be pounded and pressed into difference

One of the most important gemstone is

Like other substances, minerals are made up of

Waste products of mining may enter the

The density of water is also used as

The smallest part of an element that has all the characteristics of that particular element is known as

Highly valuable and rare nonmetallic minerals are known as

One carat is equal to

We can reduce our need of minerals from land by

The specific gravity of gold is 19, so its density would be

The two groups of minerals are based on minerals'

Nonmetallic minerals are good insulators of

Coal near the surface is extracted by

Silicate minerals make about

Surface coal mining is sometimes known as

The two methods used in mining are

The ratio of an object's mass to its volume is known as

To break up the ore, most common usage is

In effect to the ecosystem, mining can destroy or disturb

The ratio of an object's density to the density of water is known as its

One way of reducing harm to the environment is

Minerals that don't contain combination of silicon and oxygen are known as

The method miners choose depends on

Aligned grains of flat minerals are generally found in

Index minerals are used to estimate the depth, temperature and pressure at which rock undergoes

Rocks present deep inside the Earth change due to