7.Answer the question
What substances are minerals?
=solid
8.Complete the sentence
Calcite is a .............................
=mineral
9.Choose the correct answer
The rocks of the earth‟s crust are divided into three main groups........................
=
sedimentary rocks, igneous rocks and metamorphic rocks
10.Choose true or false
Geologists define a mineral as a unnaturally occurring, solid crystalline substance,generally
inorganic, with a specific chemical composition
=
Неверно
11.What are chemical reactions?
=
Chemical reactions are interactions of the atoms of two or more chemical elements
12.
Which elements stands for Fe, Na, K symbols?
=Sodium, iron, potassium
13. Find the meaning of the word "Isotope"
=They are atoms that have the same number of protons and electrons but different numbers of
neutrons and therefore have different physical properties
14. What is Atomic Number?
=Hardness is a measure of the ease with the surface of a mineral
15. What is atomic mas
=The atomic mass of an element is the sum of the masses of its protons and neutrons
16. Choose the correct conjunction
......................... you give me the keys of the safe, you will be shot
=unless
17.
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