1. If you boil water, it turns to steam. (Conditional 0)

2. If I were an astronaut, I would take the photo of Turkey from space. (Conditional 2)

3. If you put a stone in the water, it goes down. (Conditional 0)

4. If you put oil into the water, it floats. (Conditional 0)

5. If there was no water on Earth, we wouldn't exist. (Conditional 2)

6. If you were a bird, where would you fly to? (Conditional 2)

7. Anna will pass the exam if she studies hard enough. (Conditional 1)

8. If you heat ice, it melts. (Conditional 0)

9. I wouldn't do it if I were you. (Conditional 2)

10. If gets any worse, I will take him to the doctor. (Conditional 1)

11. If the snow gets any worse, we will have to stop walking. (Conditional 1)

12. If the ice melts, it turns to water. (Conditional 0)