COMETS

Read the following website: http://www.cosmos4kids.com/files/solsyst2_comets.html

Answer the following questions in full sentences:

1. Of what material(s) are comets composed?

2. What is the shape of a comet's orbit?

3. Around which solar object to comets orbit?

4. Of what material(s) is a comet's tail composed?

5. Accroding to what criteria do scientists categorize different comets?

6. Why is it important to study comets?