class 10 minerals

By definition, a mineral has which of the following characteristic(s)?

• definite chemical composition

• naturally occuring

• both

Minerals are found in varied forms in nature, ranging from the hardest diamond to the softest talc.

• TRUE

• FALSE

A particular mineral that will be formed from a certain combination of elements depends upon the ..................... conditions under which the material forms

• PHYSICAL

• CHEMICAL

• physical and chemical

• MATHEMATICAL

The term ........... is used to describe an accumulation of any mineral mixed with other elements

• ORE

• COMPOUND

• MIXTURE

• NONE

The mineral content of the ore must be in sufficient ................. to make its extraction commercially viable.

• hardness

• lusture

• concentration

• density

What determines the cost of extraction of minerals?

• The type of formation

• structure in which they are found

• both

In igneous and metamorphic rocks minerals may occur in the .......

• cracks

• crevices

• faults or joints

• all

The smaller occurrences of minerals are called lodes and the larger are called veins.

• True

• False

Major metallic minerals like tin, copper, zinc and lead etc. are obtained from

• metamorphic rocks

• sedimentry rocks

• igneous rocks

• igneous and metamorphic rocks

In sedimentary rocks a number of minerals occur in ......

• upper part

• lower part

• beds or layers.

• middle part