Give reasons:-
(1)Change in pre-existing rocks into a new form.
(2)Sedimentary rocks are layered.
(3)Igneous rocks are called hard rocks.
Answers
Answer:
change in pre-existing rocks into a new form -this type of rock is called metamorphic rock. due to heat and pressure change take place in existing rock that is igneous and sedimentary rock and change into a new type of Rock that is called metamorphic rock . which is totally different in nature and feature.
Explanation:
sedimentary rocks are layered _ This type of rocks are found near the sea beds river brought sediments every year and this sediments settle there . layer after layer added due to the pressure after many years they change into sedimentary rock that's why they are layered.
igneous rocks are called hardrox because they formed due to volcanic eruption while any volcano erupt Lava comes out after cooling and solidified it a type of rocks are formed that is called igneous rocks. hardness in a mineral is the function of the strength of their chemical bonds.