Question

chapter 15 classification of matter quiz
classify the following as an element, compound, homogeneous, or heterogeneous mixture.

1. salt water:
2. nacl:
3. gold:
4. salad:

classify the following as a chemical change or physical change:

1. crushing ice:
2. food spoiling:
3. burning paper:

classify the following as chemical or physical property

1. flammability
2. melting point
3. corrosive

fill in: use word bank at bottom to answer 11 - 17 questions

1. the scattering of light by particles in a mixture
2. a homogeneous mixture that remains uniform
3. matter in which all atoms are alike
4. mixture of air and water droplets
5. heterogeneous mixture that does not separate
6. made from atoms of 2 or more elements
7. a type of mixture in which all substances are uniformly spread out.
8. substances can be split into two parts, what are they?

word bank
element homogeneous mixture colloid
tyndall effect solution fog
compound heterogeneous mixture coagulation
suspension law of conservation.

Explanation:

• Question 18: Substances can be split into pure substances and mixtures. Pure substances are either elements (like gold, where all atoms are alike as in question 13) or compounds (like NaCl, made from atoms of 2 or more elements as in question 16). Mixtures can be homogeneous (like a solution, a type of mixture in which all substances are uniformly spread out as in question 17) or heterogeneous (like salad, salt - water, or a suspension which is a heterogeneous mixture that does not separate as in question 15).

Answer:

Pure substances and mixtures.