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They're geodes.

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Q: What are the hollow ball-like objects that contain minerals such as quartz which are found in sedimentary rocks?
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What are the hollow ball-like objects found in sedimentary rocks which contain quartz?

They are called geodes.


Can minerals be found in everyday objects?

Yes! Almost everything is made out of minerals!


Can minerals and common objects with the same hardness scratch each other?

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!


What objects come from rocks?

if the rock contains an ore, then metal. diamonds, gold, other precious stones / minerals.


Identify seven features that you can use to identify the depositional environment in which sedimentary rocks formed?

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.