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1. Say whether the following statements are true or false.

1. American researchers try to convert methane gas into solid.

2. When burning methane produces carbon dioxide and water.

3. Converting methane into useful chemicals needs high temperature.

1

2

3

4

5

6

7

2. Match the terms and their definitions. Put them into rows to read a secret word in the selected column.

a) gas

1) a colorless odorless flammable gas produced by decomposition of organic matter or from coal and used especially as a fuel;

b) liquid

2) a substance added to the chemical reaction to alter (usually to increase) the rate of reaction; it is not changed in the reaction nor does it change the nature of the products;

c) carbon

3) a nonmetallic chemical element occurring in nature especially as diamond and graphite and as a constituent of coal, petroleum, and limestone;

d) hydrogen

4) flowing freely like water, neither solid nor gaseous;

e) methane

5) the smallest particle of a chemical element that can exist alone or in combination;

f) an atom

6) a fluid that tends to expand indefinitely;

g) a catalyst

7) a gaseous colorless odorless highly flammable chemical element that is the lightest of the elements.

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