Rocks and Minerals

Many materials in our everyday life are made of rocks which are in turn made from various materials. Depending upon the way it formed, Rocks can be generally classified into how many types?

The Earth can be divided into layers. Which of the below are layers of the Earth? More than one can be correct.

The Earth's core is made of molten material which comes out when volcano erupts. This later cools and solidified to form Igneous Rocks.

[blank_start]Pumice[blank_end] is porous or full of holes and is formed from the lava that is frothy with a lot of air in it. It also can float.

Rain, wind and rivers flowing down mountains, wear away rocks on mountains. These rocks particles are carried down and deposited elsewhere. Repeated deposition caused pressurization and hardening of the materials. Such way formed rocks are

Obsidian is smooth and glassy rocks and it is formed by the quick cooling of lava. It is used in making jewellery.

Select the rocks that comes under the category of sedimentary rocks:

[blank_start]Metamorphic rocks[blank_end] are formed dur to physical and chemical changes in igneous, sedimentary rocks. These changes happens due to heat and pressure. Marble is formed from sedimentary rock limestone and it is used in making statues. Slate is formed from shale and used in making bricks and cement. Gneiss is formed from granite and used in building stones. Quartzite is formed from sandstone and used in glass/ceramic industries.

Label the suitable rocks

Metamorphic rocks are formed from older metamorphic rocks themselves.