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Learn about pure substances, compounds, mixtures, measuring matter, density calculations, and changes in matter with detailed explanations and examples.
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Describing Matter • Physical • Chemical • Physical • Physical • Chemical • Physical (Duh)
7. Both are pure substances and compounds are made of elements. 8. Mixtures are not chemically combined and do not have set ratios. Mixtures keep their properties while compounds get new properties.
9. C 10. G 11. E 12. A 13. J 14. D 15. I 16. B 17. H 18. F
Measuring Matter • 3cm x 5cm x 10cm = 150cm3 • D= 180g/150cm3 = 1.2g/cm3 • Yes. No. The mass is constant while weight varies with gravity. • It is more dense than the water. • No, they could have different masses.
6. The amount of matter in an object. 7. The amount of space an object takes up. 8. The ratio of the amount of mass per unit of volume. 9. Volume cm3 or mL Mass g or kg Density g/mL and g/cm3
6. Yes, Yes, No 7. False, Matter 8. True 9. True 10. True 11. False, Absorbed 12. False, Released
Calculations • 8cm3 • 8cm3 • 1m3 • 4g/mL