1."sources of energy"is a physics chapter or chemical. 2." force and pressure" is a chemistry chapter or physics chapter 3."friction is a chemistry chapter or physics chapter 4." combustion" is a chemistry chapter or physics chapter 5."conservation of plants and animals " is a chemistry chapter or physics chapter 6."electric current and its chemical effects " is a chemistry chapter or physics chapter 7. "Stars and solar system " is chemistry chapter or physics chapter 8."pollution of air" is a chemical chapter or physics chapter ITS urgent. Please help me

1."sources of energy"is a physics chapter or chemical. 2." force and

1.	1."sources of energy"is a physics chapter or chemical. 2." force and pressure" is a chemistry chapter or physics chapter 3."friction is a chemistry chapter or physics chapter 4." combustion" is a chemistry chapter or physics chapter 5."conservation of plants and animals " is a chemistry chapter or physics chapter 6."electric current and its chemical effects " is a chemistry chapter or physics chapter 7. "Stars and solar system " is chemistry chapter or physics chapter 8."pollution of air" is a chemical chapter or physics chapter ITS urgent. Please help me
Answer» ICS2. PHYSICS 3. PHYSICS 4. CHEMISTRY5. PHYSICS 6. PHYSICS 7. PHYSICS 8. PHYSICS