rocks
how are igenous rocks formed
what is lava
what is the hardest mineral
what is diamond
what is the top layer of soil
what is humus
what type of rock is obsidain
what is igneous rock
what is the least hardest mineral
what is gysum
how are metamorphic rocks are formed
what is preasure and heat deep inside the earth
what shows the hardness of a mineral
what is Mohs hardness scale
what lives in humus
what is dead plants and animal organisims
what type of rock is lime stone
what can be scratch by a penny
what is cacite,gybsum and talc
how are sedimentary rocks are formed
what is weathering and erosion
what is the least hardest mineral
what is talc
what is in top soil
what is organic matter roots worms
what type of rock is marble
what is metamorphic rock
what type of rock is flint
what is sedimentary
what is lava
what is melted rock that reachs the earths surface
what can scratch a diamond
what is diamond
what lives in sub soil
what is roots and other livivng organisims
what type of rock is basalt
what is igneous
what does compaction mean
what is what happens when a sediment is crushed or compressed
what is erosion
what is the process by which sediments are carried by water wind and ice
what can talc be scratch by
what is everything
what are the 5 layers of soil
what is humus top soil sub soil c horizion and bed rock
what type of rock is coal
what is sedimentary
what is in bedrock
what is solid rock