Fill in the blanks in the following statements:
Changes in which new substances are formed are called _______changes.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement we need to complete is about changes that result in the formation of new substances.

2. **Identifying the Type of Change**: There are two main types of changes in chemistry: physical changes and chemical changes. Physical changes do not result in new substances, while chemical changes do.

3. **Defining Chemical Changes**: Chemical changes are processes where reactants undergo a transformation to form new products with different chemical properties.

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