Find all the sentences with subordinate clauses in the text. Define their functions.

24. Key Step Made Towards Turning Methane Gas Into Liquid Fuel

to be valued	цінитись за шось	readily	легко, просто
a bond	з’єднання	currently	в даний час
to bind	зв’язувати	a catalyst	каталізатор
to burn	горіти, спалювати	inefficient	неефективний
to break	розривати	selectively	вибірково
carbon	вуглець	advance	досягнення
hydrogen	водень	to transform	перетворювати
to convert	перетворювати	required	необхідний

Researchers at the University of Washington and the University of North Carolina at Chapel Hill have taken an important step in converting methane gas to a liquid, potentially making it more useful as a fuel and as a source for making other chemicals. Methane is valued for its high-energy carbon-hydrogen bonds, which consist of a carbon atom bound to four hydrogen atoms. The gas does not react easily with other materials and so it is most often simply burned as fuel. Burning breaks all four hydrogen-carbon bonds and produces carbon dioxide and water. Converting methane into useful chemicals, including readily transported liquids, currently requires high temperatures and a lot of energy. Catalysts that turn methane into other chemicals at lower temperatures have been discovered, but they have proven to be too slow, too inefficient or too expensive for industrial applications. Binding methane to a metal catalyst is the first step required to selectively break just one of the carbon-hydrogen bonds in the process of converting the gas to methanol or another liquid. The work should stimulate further advances in developing catalysts to transform methane into methanol or other liquids.

Speech patterns

They	prove	to be	good specialists.	Виявляється, що вони хороші спеціалісти.
appear
turn

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.

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.

Write down 5 questions to the text.

Decide what info you would include in your summary of the text. Write this info in the form of topic sentences.

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