| Term | Definition |
|---|
| compound | anysubstance consisting of two or more atoms (elements) that are chemically combined. |
| cycle | a periodically repeated sequence of events; a series of events or operations that repeat regularly in the same order. |
| oxidation | the most common way in which oxygen combines with other substances. |
| oxygen | a colorless, ordorless gas. The most common element on earth. Combines easily with many other substances. |
| ozone | a colorless gas whose molecules are composed of three oxyben atoms. |
| Photosynthesis | the chemical process by which green plants make their own food. They do this by combining carbon dioxide and water in the presence of chlorophyll and light. Oxygen is given off as a byproduct. One "side" of the oxygen cycle. |
| respiration (cellular) | chemical reactions that release energy for the suppor of cell life. Carbon diooxide and water are given off as waste. One "side" of the oxygen cycle. |
| Ozone which acts as pollution | found near the ground |
| __ oxygen molecules bond together to form oxygen molecule | two |
| __ oxygen molecules bond together to form ozone | three |
| Land plants take in oxygen | through tiny holes in their outer surfaces. |
| Earth's rainforests are important because | they produce about one-third of the world's oxygen. |
| Oxygen cycle | contains both respiration and photosynthesis |
| combustion | a form of rapid oxidation. |
| Carbon dioxide and water | Waste products of respiration |
Combine with other sets
Share on Facebook
Share on MySpace