They're geodes.
They are called geodes.
Yes! Almost everything is made out of minerals!
No, minerals and common objects with the same hardness are not able to scratch each other and leave a mark behind. For example, minerals with a hardness of 2.5 - 3 include gold and silver. Try scratching two pieces of jewellery made of gold and silver. It does not make a mark at all!
if the rock contains an ore, then metal. diamonds, gold, other precious stones / minerals.
Sorting= The tendency for currents of air or water to separate sediments according to size.Angularity= As sediment is transported from its source to where it is deposited, the particles collide with each other and with other objects in their path.Stratification= Layering of sedimentary rock.Cross beds and graded bedding= Some sedimentary rocks are characterized by slanting layers. Graded bedding are various sizes and kinds of materials are deposited within one layer a type of stratification.Ripple marks= Are caused by the action of wind or water on sand.Fossils = Fossils are the remains of ancient plants and animals.Concretions are sedimentary rocks that sometimes contain lumps of rock that have a composition that is different from that of the main rock body.
A geode,(I bielive)
They are called geodes.
Yes! Almost everything is made out of minerals!
geodes
Some objects that contain electromagnets are doorbells, speakers, printers, and calculaters
Two common objects which contain electromagnets are a calculator and a compass.
Its a Geode. :) ~Hope it helped!~
grave
grave
Geodes
Clasts Pebbles (in a conglomerate) Geodes
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