Biology & geology

What aspect has our planet at first?

It was like a big ball of fire.

What made that the heaviest materials go down and the lightest materials come up?

The gravity differentiation

How many layers did the Earth have'?

3

In the crust, which tipe is thicker?

Continental

which is the thickest layer of the earth?

the mantle

what is the metal composition of the core?

iron nickel and sulphur

´Rocks are a natural asociation of…

minerals

What are the properties of rocks?

composition and texture

how it is called a rock made of 1 mineral?

homogeneus

ow it is called a rock made of 2 or more minerals?

heterogeneus

what did we need to study the texture of rocks

a microscope

what are the 3 types of rocks?

igneus, sedimentary and metamorphic

How are formed the igneus rocks?

when magma solidyfies

how we call the igneus rocks created above?

volcanic rocks