What is the difference between Ionic and Covalent compounds?

Ionic compounds are formed from strong electrostatic interactions between ions, which result in higher melting points and electrical conductivity compared to covalent compounds. Covalent compounds have bonds where electrons are shared between atoms.

Bassically Covalent bonds share electrons and ionic take or give

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geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.