11739261
Beschreibung
Karteikarten von Jaweria Khalid, aktualisiert more than 1 year ago
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Erstellt von Jaweria Khalid
vor fast 7 Jahre
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| Frage | Antworten |
| The Earth's Early Atmosphere: | The Earth's atmosphere forms a layer of air around our planet and is vital for life on earth, without this we would have no oxygen to breathe and temperatures would be too cold for life. |
| Mixtures, Elements and Compounds: Gases | The air in the atmosphere consists of two elements: nitrogen and oxygen. |
| What is an element: | An element is made of only one type of atom. |
| What is a compound? | A compound is made from two or more elements that are chemically combined together. Example : Water and Carbon Dioxide. |
| The Atmosphere: | The Atmosphere is a mixture of elements and compounds (N^2 and CO2) It is a mixture because different substances are not chemically combined together. The atmosphere is about 100 km thick and 3/4 of the mass is within the first 11 km. |
| AND SEE STATES OF MATTER |
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