Rock Description
What rocks are formed when magma leaves the Earth's surface?
Volcanic rocks
Dark rock, sometimes with a porous appearance, which can contain green olivine crystals
Basalt
What are the two types of crusts?
Continental and oceanic
What rocks can be used to make bricks, ceramics and tiles?
Clayey
What is a mineral?
Solid, inorganic substance of natural origin and with a defined chemical compostion
What rock is made of a single material, calcite?
Limestone
Clasts are visible to the naked eye and smaller than 2 mm.
Sandstone
What subsystem is composed of water which covers 3/4 of our planet?
Hydrosphere
What types of rocks can be used as energy?
Coal and petrol
What is hardness?
The minerals resistance to scratching.
What rocks are composed of minerals arranged in a parallel manner?
Foliated rocks
Rock with visible light and dark bands. Quartz (gray) and feldspar (white).
Gneiss
What layer is between the crust and the core?
The mantle
Limestones, dolomites and clays are used to make what?
Cement
What is streak?
What rock has a massive appearance and do not present any type of structure?
Non-foliated rocks
What type of foliated metamorphic rock has very fine grain which can not be distinguished by the naked eye? It also has varied colors.
Slate
What subsystem is the totality of living beings on Earth, which depend on all spheres?
Sand and gravel are mixed with cement and water to make what?
Concrete
What two large groups can minerals be separated into?
Silicate and non-silicate material
Name one type rock formed when the magma cools close to the surface, and have characteristics that are between the other two groups.
Philonian, sub-volcanic, hypoabyssal rocks
What is rock formed principally of calcium carbonate depending on impurities or other minerals?
Marble
What is the solid and rocky part of the Earth on which the other components are found?
Geosphere
Masonry is made from what type of rocks?
Igneous and metamorphic
What is cleavage?
Ease with which minerals can separate into sheets, such as micas.