Answer:
1.  Always put hair up at all time Because if you don't you can accidently burn your hair and you don't want to get chemicals on it. 
2. Always Wear your goggles Because if you don't your eyes can start like burning if you get to close to a chemical and when you have your goggles on it won't burn at all. 
3. Always wear gloves because if you don't your hands can get Irritated because you can touch sum with your bare hands and It will probably be something that can make your hand burn  
Ik I have a lot of burning things in there but Ik from experience lol 
Explanation:
 
        
             
        
        
        
Answer:
Most humans would associate the smell of the doctor's or dentist's with something bad or painful, when on the other hand baking cookies or having a nice smell of Thanksgiving can remind us of tasty food and comfort with family or just comfort in general.
Explanation:
Above ^^
 
        
             
        
        
        
Answer:
The substance is chlororphyll
 
        
             
        
        
        
Cyanobacteria obtain their energy through photosynthesis