The White Cliffs of Dover are composed mainly of:
A: Calcium Carbonate
B: Silicon Dioxide
C: Mangan Oxide
D: Iron Oxide
A: Calcium Carbonate
B: Silicon Dioxide
C: Mangan Oxide
D: Iron Oxide
举一反三
- Which of the following will you classify as bases? A: ammonium hydroxide B: potassium hydroxide C: ammonium chloride D: nitric acid E: sodium phosphate F: calcium chloride G: carbon dioxide H: calcium carbonate I: calcium oxide J: silicon dioxide
- Which of the following will you classify as acids? A: sufuric acid B: nitric acid C: ammonium hydroxide D: sodium phosphate E: calcium chloride F: carbon dioxide G: calcium carbonate H: calcium oxide I: silicon dioxide J: potassium hydroxide
- What is the formation of stalactites mainly related to? A: The erosion of calcium carbonate B: The precipitation of calcium carbonate C: earthquakes D: the corrosion from wind
- Greenhouse gases include . A: carbon dioxide B: CFCs C: methane D: nitrous oxide
- The most abundant greenhouse gas in the atmosphere is . A: nitrous oxide B: methane C: chlorofluorocarbons D: carbon dioxide