(Pls Help) The study of such concepts as motion, force, y energy, matter, heat, sound, light, and the components of atoms is: - Physics
- Biology
- Earth Science
- Astronomy

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Nonpoint source pollution is difficult to control because it