=who Fill in the blanks with an appropriate conjunction

1.Fill in the blanks with an appropriate conjunction

He was a proud man ………………………. resisted his friends’ offers of help

=who

2.Fill in the blanks with an appropriate conjunction

He is so tight-lipped that no one knew ………………………. he enjoyed the party or no

=whether

3.Fill in the blanks with an appropriate conjunction

I was relieved ........................ it finished

=when

4.Fill in the blanks with an appropriate conjunction

There was a hassle over ……………………… should pay for the broken window

=who

5.Fill in the blanks with an appropriate 

I found the key …………………………. I had lost

=which

6.Choose the the correct answer

What are minerals?

=Minerals are the building blocks of rocks

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. Put the right conjunction