Answer the following questions. You will receive immediate feedback when you select your answer or when you click on the green check mark (). When you are finished, click the How Did I Do? button to see your score.

1. Snow is included in which sphere?
   
   

2. Volcanoes are a part of which sphere?
   
   

3. Cold viruses are a part of which sphere?
   
   

4. Oxygen is a part of which sphere?
   
   

5. The earth is usually categorized into how many spheres?