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An atom having either a positive or negative electrical charge is called a mole electron

An atom having either a positive or negative electrical charge is called a(n):

a.molecule.

b.electron.

c.ion.

d.isotope.

e.plasma.

2.A variety of an element that is heavier than normal because of the presence of extra neutrons is called a(n):

a.molecule.

b.electron.

c.ion.

d.isotope.

e.heavy atom

3.Most of the mass of an atom is located in its:

a.protons.

b.electrons.

c.outer orbits.

d.nucleus.

e.ions.

4.Which of the following is NOT part of the general definition of a mineral?

a.narrow range of chemical composition

b.crystalline character

c.inorganic

d.naturally occurring

e.amorphous

5.Most of the rocks of the Earth's crust are made up of which of the following mineral groups?

a.silicates

b.oxides

c.carbonates

d.tungstates

e.vanadates

6.Which silicate mineral is the most abundant in the Earth's crust?

a.basalt

b.feldspar

c.obsidian

d.magnetite

e.calcite

7.Which property of minerals is variable and therefore the least reliable as a clue in identifying a mineral type?

a.color

b.cleavage

c.hardness

d.crystal form

e.luster

8.What is the name of an aphanitic rock consisting of 50% pyroxene, 20% plagioclase feldspar, 20% olivine and 10% hornblende?

a.Andesite

b.Basalt

c.Gabbro

d.Diorite

e.Granite

9.Granite is a type of:

a.volcanic rock.

b.metamorphic rock.

c.intrusive igneous rock.

d.extrusive igneous rock.

e.sedimentary rock.

10.What is a common distinguishing characteristic of sedimentary rock masses?

a.They tend to be extremely hard.

b.They are always very colorful.

c.They are formed by solidification from a melt.

d.They tend to be layered.

e.all of the choices

Feb 13 2020 View more View Less

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