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.
They are called geodes.
A geode,(I bielive)
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
Cell phonescomputerstelevision