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
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1. PHYSICS
2. PHYSICS
3. PHYSICS
4. CHEMISTRY
5. PHYSICS
6. PHYSICS
7. PHYSICS
8. PHYSICS
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