Page 63 - 新思维科学学生用书7 样章

2 Materials and their structure

2.7 Compounds and mixtures

In this topic you will:

• make a compound and a mixture
• learn about the difference between a compound and a mixture
• give examples of mixtures.

Getting started Key words

• Which of these are elements and which are compounds? composition

nitrogen carbon calcium sodium evaporating
dioxide chloride basin
O 2 CaO CH 4 H O K filings
2
• What is the difference between an element and a mineral
compound? mixture
• Discuss with a partner and be prepared to share with the natural emissions
class. pipe-clay triangle

pure

62