1. CHECK YOUR ANSWERS!!!

2. Different Compounds This is a mixture because the molecules are not all the same – there are 2 different compounds.

3. Element This is a pure substance because the molecules are all the same – there are all the same elements (single circles).

4. Elements This is a mixture because the molecules are not all the same – there are 3 different types of elements (single circles).

5. Elements and Compounds This is a mixture because the molecules are not all the same – there are both elements (single circles) and compounds.

6. Compounds This is a pure substance because the molecules are all the same – there are all the same compounds( 2 circles connected).