Презентация, доклад по английскому языку на тему Химия. Введение

теория
Классифицировать, устраивать
Вес атома
свойства
обобщение
определение
Соединение, смесь
изменять
Материя, вещество
жидкий

the fact that substances cannot change their….
…… means that no matter how a substance is changed, what it is made up of will always stay the same.
When scientists make a ……… they succeed after trying very hard .
Without oxygen there cannot be…..- things cannot burn.
…………… is what physical objects are made of.
All classifications in chemistry need to be………..
…………… believed that they could turn iron into gold.
Mendeleev’s table classifies the elements found in the nature according to their ……….

the summary using the words from the text.
Chemistry is the science which …….1… all other sciences. Through chemistry, we can study how things are made and what they can do.
Alchemists discovered a lot of chemical …2….. Before chemistry developed properly. There are three main areas of study in modern chemistry. The first is about how…3… change when something happens to them. The second is about how things are made, and looks at the atomic …4… of elements. The third is to look at the …5…of elements.

has about …… billion letters of coding.
We inherit the information from our …..
DNA will be useful in the future for……care.
The Y chromosome comes from our ………
Archaeologists use DNA found in people’s …………
The police get information from DNA found at a ……

bond, materials, compound, process, form, atoms, gas
For example, two …1…: hydrogen and oxigen. Hydrogen has the atomic number …2… and oxigen …3…. Two molecules of hydrogen and one of oxygen = one …4…
Water can change its …5… but is still H2O. Some chemical processes appear complicated as they have different …6… bonding in different quantities.